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FTC Dismisses Complaint Against Rambus

swordboy writes "A federal judge just threw out the FTC lawsuit against Rambus. This has been discussed at length here before but this changes the landscape yet again. An interesting, possibly coincidental item is that Intel just today announced a new and very powerful DRAM interface that bypasses Rambus IP altogether."

45 of 175 comments (clear)

  1. Woo by Anonymous Coward · · Score: 5, Insightful

    Now, the question is, does this offer the same price-point as DDR?

    I mean, DDR-II has a significant price-premium over current DDR, but if it doesn't....

    Woo. It might be worth going Intel for once :)

  2. Time is of the essence by Rosco+P.+Coltrane · · Score: 5, Insightful

    Intel just today announced a new and very powerful DRAM interface that bypasses Rambus IP altogether.

    Unfortunately, most court disputes between hi-tech companies finish long after the technologies in question are dead. Just look at Lineo/Canopy : when they won the DRDOS settlement against Microsoft, Windows 95 and DOS were already just a painful reminder of the past.

    So yes, perhaps it has something to do with the fact that Intel can do without the Rambus IP. However, I doubt it's the real reason, because even when the disputed technologies are obsolete when the court reaches its verdict (or the parties settle), the money from damages or settlement is very real.

    --
    "A door is what a dog is perpetually on the wrong side of" - Ogden Nash
    1. Re:Time is of the essence by Jeff+DeMaagd · · Score: 4, Insightful

      Unfortunately, law and technology are completely different realms. The law realm tries its damndest to be exacting which costs expedience, and the technology realm tries its damndest to be fast.

    2. Re:Time is of the essence by sevensharpnine · · Score: 2, Funny

      The law realm tries its damndest to be exacting which costs expedience[...]

      I think that could be more accurately phrased: The law realm tries its damndest to cost, which happens to be exacting.

      --
      "God is a comedian playing to an audience too afraid to laugh." -Voltaire
  3. Quality... by Eric_Cartman_South_P · · Score: 4, Funny
    My R0mbu0 RAM works f1aw1ess01. I wi10 the go01vernment would lay 0ff Ramb0us. THey m1ight have been a bit pa01tent mad ear101ly on, but it was not because they failed to make a good product. The00101110ir RAM works very, v10ery fast and I love it100110. I on0ly use Ram1001bus RAM in my b0010x.

    1. Re:Quality... by chunkwhite86 · · Score: 3, Funny

      My R0mbu0 RAM works f1aw1ess01. I wi10 the go01vernment would lay 0ff Ramb0us. THey m1ight have been a bit pa01tent mad ear101ly on, but it was not because they failed to make a good product. The00101110ir RAM works very, v10ery fast and I love it100110. I on0ly use Ram1001bus RAM in my b0010x.

      Yeah, right. Whatever you say pal. Everyone knows that overclocked CAS2 DDR400 is the most stable kind of me

      [NO CARRIER]

      --
      I'd rather be a conservative nutjob than a liberal with no nuts and no job.
  4. Thank you! by SuperBanana · · Score: 3, Funny
    Entire long copy of Yahoo article snipped

    Dear Sir,

    Thank you for mirroring our content, as we are a global search engine with thousands of webservers across the world and could not possibly handle the load from Slashdot. Whew, you saved us! We owe ya a cold one next time you're in CA.

    The Yahoo Sysadmin Team

  5. Cheap by ThisNukes4u · · Score: 3, Funny

    Does this mean that RDRAM will become affordable now?

    --
    thisnukes4u.net
    1. Re:Cheap by filtersweep · · Score: 4, Interesting

      I fried a mobo on my Rambus system a few weeks ago and quickly found out how rare these mobos still are- and how little the price of memory has dropped over the last two years.

      Memory is like disk space. The general population demands quantity over speed or quality. Rambus was a technology that never really trickled down to the average desktop.

      --


      Those that suggest you "dance like no one is watching" really want to see you make a complete fool of yourself.
  6. Rambus is a proof of what SCO can do by Anonymous Coward · · Score: 4, Insightful

    Rambus story shows that, in US, anything is possible in courts, even if you screw people, even if you do nasty things, outrageously lie, etc... at the end you may get awarded in court.

    That's why making fun of SCO doesn't make me laugh much, because there is a possibility that they can get what they want in the courts.

  7. Re:This is an important decision by Rosco+P.+Coltrane · · Score: 2, Funny

    Within 5 years, I predict that most machines will use RAM memory for all system storage

    Tally-ho then, time to get Duracell stocks I guess.

    --
    "A door is what a dog is perpetually on the wrong side of" - Ogden Nash
  8. Re:This is an important decision by El · · Score: 4, Insightful

    Hard drives fail and are slow as hell. And are several orders of magnitude less expensive per byte stored. Unless something happens to drastically alter the relative price of hard disks vs. RAM, I predict that you're blowing smoke.

    --

    "Freedom means freedom for everybody" -- Dick Cheney

  9. RAMBUS is so dead by lingqi · · Score: 4, Informative

    Actually it's more like RAMBUS has *been* dead ever since DDR / DDR2 became competitive in terms of prices.

    Not just regurgitating history, though - I wonder if Intel will learn a lesson from RAMBUS's demise in regard to the new fangled transmission scheme*. RAMBUS died because it was 1) not open and 2) charged royalties. DRAM is such a low margin product that royalties will kill any possibility of your product hitting mass market (in RAMBUS's case, even with intel's backing - because none of memory manufactures liked it, so despite playing along they were really thinking of JEDEC and how to get DDR to be more popular / competitive). Intel, though, is probably doing this in a choke move for AMD, so it puts Intel at a tough decision point again: open standard = AMD can use it too, or RAMBUS version 2. That said, Intel isn't stupid, I am guessing their upcoming processors will be designed around a high memory bandwidth architecture to take advantage of it better than what competitors can. The low turnaround time (i.e. no bus turnaround!) is so sexy in a geeky way. circuit board designers are going to get soooo much headache over this though...

    * the concept is indeed pretty cool, though you'll need some tough lil drivers that can handle incoming voltage swings while it's driving. The power dissipation on these I/O buffers are key, but in reality these things already exist, of course - just a bit pricy.

    --

    My life in the land of the rising sun.

    1. Re:RAMBUS is so dead by Best+ID+Ever! · · Score: 5, Insightful

      Actually it's more like RAMBUS has *been* dead ever since DDR / DDR2 became competitive in terms of prices.

      I think you mean RDRAM is dead. RAMBUS, the company, is still very much alive thanks to this ruling, which allows them to extort royalties for SDRAM.

    2. Re:RAMBUS is so dead by FuzzyBad-Mofo · · Score: 2, Interesting

      That's right, it was a collaboration of RAMBUS(T) and INTEL to monopolize the memory market. Too bad, so sad, they lost. Anybody remember IBM and their MCA plans?

    3. Re:RAMBUS is so dead by Trejkaz · · Score: 2, Interesting

      I thought SDRAM was dead too.

      --
      Karma: It's all a bunch of tree-huggin' hippy crap!
    4. Re:RAMBUS is so dead by rsmith-mac · · Score: 3, Informative

      More importantly, DDR is short for DDRSDRAM, as DDR is a SDRAM variant. Now they can start charging for DDR RAM too.

  10. RamBus by Anonymous Coward · · Score: 2, Funny

    I did that once, didn't get caught either. The driver was freaked though.

  11. Re:Both news items are exciting by dameron · · Score: 4, Insightful
    Rambus, long an innovator in memory designs has been virtually sued to death by JEDEC members over their IP rights to the RDRAM designs.

    I can't possibly imagine how you could have followed this case and come to that conclusion unless you've had blinders on and are deep into Rambus stock. Rambus deserves the title "Litigous Bastards" almost as much as SCO.


    -dameron

  12. Business plan by SuperBanana · · Score: 3, Funny

    1.Steal technology from other companies at trade industry conference, and patent it
    2.Sue other companies before its barely in use and make sure nobody uses said technology
    3.Get tied up in legal battles until patent is useless
    4.???
    5.Profit!

  13. RAMBUS is now another SCO by phamNewan · · Score: 4, Interesting

    RAMBUS is another company that is dedicated to making its money now through lawyers. Intel thought that they could take more control of PC design my picking a patented memory structure, and RAMBUS was the perfect lackey ito accomplish this. Their contract with RAMBUS would have had RAMBUS paying Intel back once RDRAM sales exceeded a certain amount. It was a win-win for those two companies, and lose-lose for everyone else due to higher long term prices for all users, and manufacturers.

    The reason for this is the RDRAM design. It takes more space on a wafer to produce, and that is why it costs more ( commission to to RAMBUS is another part, but the size difference is the key cost difference ). So memory prices would have been much higher, and Intel would have been able to squeeze AMD more due to the patented bus that RDRAM uses.

    If you go back in time, it was exactly as Intel was about to force RDRAM down everyones throats, that AMD released the Athlon. Suddenly there was an alternative to Intel in performance, and by not using RDRAM, the price difference was extreme. This is the point that AMD surged ahead in market share, and while the inroads they made were overall not significant, they were enough to show that not everyone would be pushed around.

    RAMBUS did come up with some interesting design innovations, but as soon as the writing on the wall was that RDRAM was dead due to lower prices with DDR, they turned into SCO by suing everyone that was making DDR, by use of info they had taken from JEDEC and adding it after the fact to pending patents from RDRAM. Another stellar example of USPTO excellence. RAMBUS is dead, but someone wants to make money from the rotting corpse. Just compare how similar the lawyers fees are for RAMBUS and SCO.

  14. Re:Both news items are exciting by CaptBubba · · Score: 5, Insightful
    I don't think the companies would be so hostile if they had know ahead of time that they would be paying Rambus royalties. I think the issue was more that Rambus slipped their patented process into the design and then, when it was too late to remove it, they told everyone to pay up. I think the manufacturers were rightfully pissed off. This is with SDRAM (and by extension DDR) tech, not RDRAM, which everyone expects Rambus to charge for.

    That said I think it is unsuprizing that Intel and the manufacturers would look somewhere else for the next generation of RAM technologies. They'd be foolish to deal with a companay that had tricked them before.

  15. Re:This is an important decision by gnuman99 · · Score: 3, Informative
    RAM will never replace disk storage - my prediction. How are you suppose to upgrade the system with power on? Just let the sparks fly? :)

    What about if you want to move your data to another box? Even if you think if Flash or whatever, these are slow and die much faster than a HD.

    I have no idea how the parent is "Insightful". Moderation hint for parent: Funny + 5

  16. Re:Both news items are exciting by qtp · · Score: 5, Informative

    Rambus, long an innovator in memory designs has been virtually sued to death by JEDEC members over their IP rights to the RDRAM designs.

    Nice, if it were true. The reason the JEDEC members were sueing was that Rambus was writing down the other companies ideas that were brought up at the JEDEC meetings and having their patent lawyers apply for patents on those ideas the next day. The other companies were not patenting those proposals that they were putting forth at JEDEC while establishing the SDRAM standards, due to a agreement between all members that the SDRAM standard would contain no patent-encumbered technology. When other JEDEC members caught wind of this and complained, RAMBUS left JEDEC, but their patent applications on SDRAM technology continued to change to cover new aspects of the SDRAM spec after each JEDEC meeting! They had a spy (codename: Secret Squirrel) in the meetings who was forwarding the tech to them while the spec was still being determined, and when the spec was published, most of the SDRAM spec was subject to Rambus patents on tech developed by the other members.

    Rambus ripped off the JEDEC members and the courts are saying that this is OK. WTF? All is fair in love, war, and business (I guess).

    --
    Read, L
  17. Shouldn't the subject read... by lauterm · · Score: 4, Insightful

    Shouldn't the subject read "FTC Complaint Against Rambus Dismmissed" instead of "FTC Dismisses Complaint Against Rambus". The title as it currently reads almost made me think the FTC wasn't all that bad. Then I read the body. Oh well, back to hating the FTC.

  18. Conspiracy, conspiracy by Anonymous Coward · · Score: 2, Interesting

    It would have been impossible for Rambus to have gained those patents in time for presentation at the JEDEC conferences. They had to have had those designs in hand with the patent process already underway to have been able to produce the patents at the conference. The only thing that Rambus did which was wrong was agree through a gentleman's handshake that they would not encumber the SDRAM design with patent issues. Mind you, it's not a legal agreement to simply agree to something like that, and at the first time they were confronted with their violation of the agreement, they took one of the two recourses afforded to them: leave the committee. The other would have been to dump their patents which would have been a dumb move seeing as how they are a pure IP company making their money off of patents.

    The JEDEC members continue to rip off Rambus every day that they produce SDRAM based on Rambus designs and refuse to pay them for it.

    1. Re:Conspiracy, conspiracy by qtp · · Score: 5, Informative

      decide for yourself.

      The point is that you may ammend a patent application after it has been applied for and before the decision has been made. They originally filed applications on a rather generic implementation and adjusted it to fit the spec while JEDEC was still in the process of writing it.

      At least that's what the other members of JEDEC alleged, and RAMBUS, rather than deny it outright, admitted that it was receiving emails (from someone calling themselves "Secret Squirrel") advising them on how to ammend their technology (and their patent applications), but that they did not know who they were from, and did not know that the information was the same as was being discussed at JEDEC.

      --
      Read, L
    2. Re:Conspiracy, conspiracy by VelvetHelmet · · Score: 2, Interesting

      This is actually correct. I think that if the Slashdot crowd would look at ALL the facts regarding this situation, they would see that Rambus IS a victim here. Rambus made a lot of mistakes with their behavior that can not be excused, but the evidence indicates that Rambus was invited to be part of JEDEC so that their technology could be taken.

    3. Re:Conspiracy, conspiracy by Dun+Malg · · Score: 3, Insightful
      This is actually correct. I think that if the Slashdot crowd would look at ALL the facts regarding this situation, they would see that Rambus IS a victim here. Rambus made a lot of mistakes with their behavior that can not be excused, but the evidence indicates that Rambus was invited to be part of JEDEC so that their technology could be taken.

      What? Everyone who's invited to participate in JEDEC is there so their technology can be "taken". Taken, that is, and put into an industry wide standard for all to use! If you're suggesting that RAMBUS reps at JEDEC didn't know that they were developing a standard at the meetings and were "tricked" into letting their as-yet-unapproved patent for memory into the standard, then you're an idiot.

      --
      If a job's not worth doing, it's not worth doing right.
    4. Re:Conspiracy, conspiracy by VelvetHelmet · · Score: 2, Interesting

      What? Everyone who's invited to participate in JEDEC is there so their technology can be "taken". Taken, that is, and put into an industry wide standard for all to use! If you're suggesting that RAMBUS reps at JEDEC didn't know that they were developing a standard at the meetings and were "tricked" into letting their as-yet-unapproved patent for memory into the standard, then you're an idiot.

      I'm saying that a number of the JEDEC members had prior non-disclosure agreements with Rambus regarding technology created by and patented by Rambus. Those JEDEC members knew quite well that the technologies they were pushing into the standard were already patented by Rambus. They knew this prior to inviting Rambus.

      Furthermore, while at JEDEC Rambus did not influence what was put into the standard, or even propose technologies for inclusion. They were basically observers. It is interesting to note that they did vote 4 times, all against inclusion of technology that appeared to come from their IP.

      Rambus was invited to join JEDEC as a way to get their IP put into the standard so that the memory makers would not need to license the technology. Perhaps Rambus could have behaved better and argued against using IP-violating technologies, but saying that Rambus is the ultimate bad guy in this is wrong. At the time, they were a small company that was essentially targeted for their invention.

    5. Re:Conspiracy, conspiracy by Dun+Malg · · Score: 2, Interesting
      I'm saying that a number of the JEDEC members had prior non-disclosure agreements with Rambus regarding technology created by and patented by Rambus. Those JEDEC members knew quite well that the technologies they were pushing into the standard were already patented by Rambus. They knew this prior to inviting Rambus.

      Can you provide perhaps a link to a reputable source for this? I've never heard that version of events and it doesn't jibe with the facts as I've seen them so far. How about a patent number for this NDA exposed IP that Rambus supposedly had involuntarily included? Don't say "patent 5,243,703", because that one, though applied for in 1990, was amended numerous times over 6 years to make it apply to SDRAM.

      Furthermore, while at JEDEC Rambus did not influence what was put into the standard, or even propose technologies for inclusion. They were basically observers. It is interesting to note that they did vote 4 times, all against inclusion of technology that appeared to come from their IP... Perhaps Rambus could have behaved better and argued against using IP-violating technologies

      Voting against inclusion isn't good enough. The appropriate way to protect one's IP is to say "doing it that way might collide with some of our patents". Saying "Rambus could have bahaved better" is soft-pedaling the issue. Rambus could have ethically and pointed out the IP (this assuming they actually had any patents yet).

      Rambus was invited to join JEDEC as a way to get their IP put into the standard so that the memory makers would not need to license the technology.

      That's not how it works. Just because something is included in a standard doesn't mean it becomes public domain. The problem with your take on it is that Rambus didn't really have any IP that applied to SDRAM until after it started attending JEDEC meetings. What it had was a fairly generic RAM patent filed in 1990 that they began amending in 1992, the year they joined JEDEC. They continued to amend it, making it conform ever-closer to aspects of the SDRAM standard, even after leaving JEDEC in 1995. The post-1995 amendments were made using information emailed to them anonymously. This doesn't sound suspicious? This is the way a small, honest company behaves? Pfff...

      --
      If a job's not worth doing, it's not worth doing right.
  19. Re:Both news items are exciting by Anonymous Coward · · Score: 5, Informative

    Actually, I think you might not be aware of the manner of Rambus' actions. First of all, they're not seeking licensing for the RDRAM designs, but for patents that are infringed upon by the DDR RAM implementation.

    The reason other members of the hardware community are so upset, and the reason that Rambus has been the target of so many lawsuits, is that they were on the design commitee which decided upon the spec. for DDR in the first place, and they presented their technology to the standards working group conveniently without mentioning the fact that they owned patents on the implementation.

    That's why they deserve the title of 'litigious bastards'-- because that's pretty 'bastardly' behavior.

  20. Re:This is an important decision by ImpTech · · Score: 3, Insightful

    Oh come on! Thats just silly. Lets take all our data and put it in *volatile* storage! You said it yourself, "a backup power system will be required". What are you gonna do, put solar panels on everybody's monitor? Battery backups for all? What happens when the battery needs to be replaced? For all the failures of harddrives, you've never seen a dataloss apocalypse like what you're proposing.

    Oh, and as far as bottlenecks go, when my internet pipe can bog down my harddrive, then I'll be concerned.

  21. Re:This is an important decision by Anonymous Coward · · Score: 5, Informative

    Depends on what you mean by "RAM". FRAM and MRAM are rewriteable, random access memory technologies that are also non-volatile. Densities and price points today don't make replacing your current RAM cost effective, but give 'em a chance.

    Hard drives will still be around for bulk storage. Dollars-per-bit counts, too.

  22. Nothing special in the drivers. by Ungrounded+Lightning · · Score: 4, Interesting

    the concept is indeed pretty cool, though you'll need some tough lil drivers that can handle incoming voltage swings while it's driving.

    No you don't. You already need to drive a line that's got a charge on it from the stuff you previously drove onto it. This doesn't change that. The local end just sees the far end as being terminated by a resistor to a voltage that is either low or high, rather than being terminated by a resistor to a constant voltage.

    Driving both ways simultaneously, though, is very cute.

    The downside is the need to daisy-chain. That means you're driving multiple lines at 3.6 Gbps on EVERY chip, ALL THE TIME. That's a LOT of power. Even if you interrupt the daisy chain at the selected chip (and arrange things so that the quiescent states of the transmitters at both ends of an idle line match) it's still a lot of power unless you localize most of your memory access to the closest chip.

    --
    Bantam Dominique roosters crow a four-note song. Once you've heard it as "Happy BIRTHday" you can't NOT hear it that way
    1. Re:Nothing special in the drivers. by lingqi · · Score: 2, Interesting

      interesting on the syncing quiescent states; because this is perfect for memory - you expect everything that you are about to receive; memory never interrupts the controllers; and all timing parameters are pre-determined. shy maybe maybe DQS and refresh, but not really so much.

      this thing would be more painful to work on chip to chip communications since you don't know if the other chip is Z or the logic state you are receiving simply corresponded with your current driving logic state. (I suppose one can always send a enable / disable signal similar to DQS along with a dataline to indicated if it's active)

      brilliant for use for memory though. (and i can see why it's a necessity for all connections to be point-to-point, no way this can be on any kind of bus.

      as for needing special drivers, i would say that if the termination is term'd at vref=(Vh-Vh)/2, it helps the driver half way. That said, with the increasing usage of 50ohm / output impedance adjustable drivers on chips, maybe i am making it a bigger concern than it really is. Ahh we are no longer in the age of TTL that's for sure. =)

      --

      My life in the land of the rising sun.

    2. Re:Nothing special in the drivers. by timeOday · · Score: 2, Insightful

      I for one will pay a small premium to get 1 larger stick instead of 2 smaller ones. That way I can upgrade without chucking my original ram.

  23. Re:This is an important decision by chunkwhite86 · · Score: 2, Insightful

    Within 5 years, I predict that most machines will use RAM memory for all system storage. A backup power system will be required, but system speeds will go through the roof due to faster data access times.

    Not a chance in hell. The only acceptable solid-state data storage medium is non-volatile memory i.e. "flash" memory. No one anywhere will risk all their data to any storage medium that a dead battery would wipe out. Flash storage is waaaay too slow for primary storage. Even a modern IDE hard disk is much faster. modern SCSI even faster than that, and the latest 2 Gb/s fibre-channel disk drives even faster. DEC tried selling solid state hard disks in the mid 90's. I believe they had a 512MB, 1GB and 2GB models. They were very expensive and very slow. The same is true today.

    Hard drives fail and are slow as hell. They are the bottlenecks in 99% of today's systems. That will change soon, thanks in part to Intel and AMD.

    Not always true. First of all, some applications are CPU bound and some are I/O bound. Folding@home is CPU bound. it doesn't give a crap what your hard disk is. 'tar' and 'dd' are i/o bound, they work better on faster disks. Some applications are equally cpu and i/o bound like video editing.

    This will NOT change any time soon, nor will the disk I/O speeds of personal computers drastically change in the next five years. Yes, I am willing to bet on it.

    --
    I'd rather be a conservative nutjob than a liberal with no nuts and no job.
  24. Precendence? by Supp0rtLinux · · Score: 2, Interesting

    So does this mean the recent Pentium suits will be thrown out too???

    The only thing necessary for Micro$oft to triumph is for a few good programmers to do nothing". North County Computers

  25. Re:This is an important decision by Sivar · · Score: 3, Interesting

    1) Memory hotplugging exists today. It's hardly an insurmountable problem.

    2) Even if it were (and didn't already exist) MRAM (Magnetic RAM) is non-volatile.

    Still, I have to admit that hard drives have been "scheduled" to be replaced or obsoleted 3 or 4 times now, and every time, they have survived. They are just cheap and versatile and "fast enough", and for applications that want a high sustained transfer rate (STR), they are really quite fast. Fujitsu's latest SCSI drive can handle nearly 80MB/sec sustained for more than half of its capacity. Yo would need a hell of an expensive FLASH controller to outpace that, and FLASH technology is still hampered by a "limited number" of write operations before it dies.

    --
    Computer Science is no more about computers than astronomy is about telescopes. --E. W. Dijkstra
  26. Re:Legal history impact by Wesley+Felter · · Score: 2, Informative

    I wonder if Rambus is being kept afloat by the PlayStation 2. It isn't used in more than a handful of PC motherboards and I imagine there aren't too many Alpha EV7 and Cray X1 systems being sold.

  27. Not the end by nezroy · · Score: 3, Insightful

    Something glossed over by the article (and Rambus), but very important, is that this isn't anything even remotely like the end of the FTC investigation into this.

    "Today's ruling came after a three-month evidentiary hearing and is subject to potential further review by the full Commission and review by a United States Court of Appeal."

    and

    "The Judge's initial decision is subject to review by the full Commission, either on its own motion or at the request of either party."

    Basically one judge threw out the preliminary suit brought by a small commitee of the FTC. The case will now almost certainly go before the full FTC and, unlike an appeals process, this will involve a complete reexamination of the body of evidence. Essentially there will be a second, independent judgement by the FTC again on this matter, with potentially (and hopefully) differing results.

  28. are you implying RAMBUS was high quality? by Anonymous Coward · · Score: 4, Informative

    It wasn't. It had a high latency and it's bandwidth only exceeded the bandwidth of SDRAM a bit at first. Then, as DDR ramped up to speed, DDR blew it away in bandwidth and latency.

    Rambus was never a great idea. It was very difficult to design a mobo with it. It is rumored that no company ever designed one without the help of Rambus the company.

    To be honest, the only reason Rambus went anywhere is because Intel signed an agreement to force bundle it with P4. And this act itself launched Athlon and AMD, because Rambus was unaffordable and didn't provide levels of performance that were unreachable with regular RAM.

    If Intel had applied the same level of effort to their SDRAM or DDR motherboards, they would have produced higher performance than Rambus at lower cost. But Intel didn't, they had signed an agreement not to. And they threatened to sue VIA if they brought a (presumably high performance) SDRAM chipset to market for the P4. Only once Intel shipped their own SDRAM-based P4 chipset (the 8200?) did Intel drop this threat against VIA.

    RDRAM was mostly marketing. It's performance was never really all it was cracked up to be.

  29. No Zs here. by Ungrounded+Lightning · · Score: 3, Informative

    this thing would be more painful to work on chip to chip communications since you don't know if the other chip is Z or the logic state you are receiving simply corresponded with your current driving logic state. (I suppose one can always send a enable / disable signal similar to DQS along with a dataline to indicated if it's active)

    You have two misconceptions about the scheme in question:

    1) There is no "Z" state. Both sides are ALWAYS driving.

    2) You don't have to stop driving the line to receive what the other side is driving toward you.

    This is essentially the same hack that lets a telephone send energy at the same band of frequencies in both directions simultaneously, on a single pair of wires:

    - You terminate the line at, or near, its characteristic impedence, and so does the device at the far end.
    - You inject a current into the line/terminator junction (or, equivalently, shift the voltage at the "cold" end of the terminating resistor) to send.
    - You compare the voltage on the pin (or current through the pin, or current through the terminating resistor) to what you expected to see if the far end was at a no-current-injected (or terminator "cold" end at ground) state. The difference is the signal being injected at the far end.

    The wire is being driven at both ends at all times (no Zs). You can always tell what the far end is sending, regardless of what you're sending.

    If you chose to send by injecting a voltage at the "cold" end of the terminator, you dissipate no power when both ends are sending the same value. You dissipate a significant amount when both ends are sending opposite signals. But you also dissipate the same amount if the transmitting ends of two separate wires are switched - for the time it takes the signal to propagate and the reflection to come back. If the separation between the transmitter and receiver is more than half the length of a bit time, the quiescent state has both sides driving the same value, and the two ends drive opposite about as often as same, it's a wash.

    --
    Bantam Dominique roosters crow a four-note song. Once you've heard it as "Happy BIRTHday" you can't NOT hear it that way
  30. Open Standards by salesgeek · · Score: 2, Informative

    Having been in the business since 1988,I've seen all kinds of ideas like Rambus come and go. Generally, the idea is:

    * Create an "essential" technology that is implemented in several large manufacturer's products.
    * License the technology to everyone for big $

    Most often what happens is that for a year or two, the "essential technology" may actually be very successful. Sometimes it even sticks around for the long haul, but the price becomes a lot lower. Then someone else comes out with "The Next Big Thing" or an open standard with simmilar functionality comes into existence. Some examples that are easy to remember:

    * IBM's Microchannel Archetecture (was very cool for about two years, displaced by eisa, bus mastering ISA, then PCI)
    * Adobe Postscript, Type 1 Fonts
    * Zip drives

    Rambus isn't essential any more... but they'll be aroud as much as I don't like them.

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    -- $G