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Athlon 64 In-depth Overclocking Guide

jmke writes "Everything you ever wanted to know about Athlon 64 overclocking, and then some. If you are confused about HTT, LDT, memory dividers and relationship between these settings, then read on. This in-depth overclocking guide will show you how to get the maximum from your brand new Athlon 64 system"

32 of 193 comments (clear)

  1. OMG. What kind of.... by Creepy+Crawler · · Score: 3, Insightful

    Idiot would do that to this sort of NEW, EXPENSIVE hardware?

    Would you overclock a Z-Series IBM server? Would you overclock a 20 4-way xeons in a cluster?

    Give it a while. Its not like the MOST OF US will need that speed...

    Hell, I use a 1 GHz machine and develop on a 500 MHz machine. Yeah, 500 MHz because many users are still stuck on 300's and 450's.

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    1. Re:OMG. What kind of.... by Anonymous Coward · · Score: 3, Funny

      What kind of person is up in the middle of the night reading Slashdot? ... hmm. Self-defeating argument. I rest my case.

    2. Re:OMG. What kind of.... by J_Omega · · Score: 5, Insightful

      Is $150 for a lower end Athlon 64 really THAT EXPENSIVE?

      No, of course most wouldn't try to overclock an IBM server or clustered 20 4-way xeons. Why? Most people DO NOT OWN THOSE. That's corporate equipment. People can afford to play with $150 chips at home, and will.

    3. Re:OMG. What kind of.... by Segway+Ninja · · Score: 2, Funny

      Athlon 64 hardware is comparable in price to Pentium 4 hardware.

      Based on your argument, what kind of idiot would overclock a Pentium 4?

    4. Re:OMG. What kind of.... by blackicye · · Score: 4, Insightful

      The kind of "idiot" as you so delicately put it, that refuses to pay $249.00 - $359.00 for a $169.00 Processor.

      $482 Athlon 64 4000+ 90nm Rev
      $478 Athlon 64 4000
      $359 Athlon 64 3800
      $369 Athlon 64 3800 512K 90nm Rev E
      $334 Athlon 64 3700+ 90nm Rev
      $282 Athlon 64 3700
      $249 Athlon 64 3500
      $249 Athlon 64 3500 939pin
      $250 Athlon 64 3500 90nm 939pin
      $272 Athlon 64 3500 512K 90nm Rev E
      $174 Athlon 64 3400
      $152 Athlon 64 3200
      $169 Athlon 64 3200 939pin
      $169 Athlon 64 3200 90nm 939pin

      (Prices from pricewatch.com)

    5. Re:OMG. What kind of.... by boron+boy · · Score: 5, Insightful
      Until you have actually tried overclocking, I don't believe you can criticize overclockers.

      The likelyhood of frying parts is not very high. Before that happens you will get restarts, BSODs etc, telling you that you've messed up the settings. If you do it properly, and test your systems stability with Memtest86, Prime95 and the like, then there is no harm.

      I have my Athlon 64 3000+ running at 2.2 gHz up from the stock of 1.8. That's the speed of a 3500+ which at the time of purchase cost $170AU more. Do I need that extra speed? No. Is it handy? Yes. Games run smoother. Compilation is quicker. More research for folding@home is acheived.

      Give it a go. It's plain old geeky fun.

    6. Re:OMG. What kind of.... by jack1323 · · Score: 2, Insightful

      Although I agree with you, you can't overlook the fact that you need more expensive system parts to successfully overclock (e.g. motherboard, RAM).

      Those more expensive costs eat into your processor savings.

    7. Re:OMG. What kind of.... by Alsee · · Score: 3, Informative

      I think they know better than you what clock speeds their chips optimally run at. If your 1.8GHz Athlon wasn't likely to fail at 2.2GHz under normal conditions, they would have sold it as a 2.2GHz and made more profit on no more work.

      Actually you're wrong.

      Generally all of the chips in a single speed series come right off of the exact same assembly line, and each one is then tested for individual speed tolerances. This produces an erratic supply of lower speed tolerance chips. As the manufacturing process on a particular line ages it also tends to work out all of the bugs and the supply of low quality chips falls off. The market still demands a variety of price points to attract the maximum of low end buyers *and* to maximize profits from high end buyers. Therefore they ROUNTINELY grab "higher speed" chips to fill orders at the cheaper price points.

      The longer a line has been out the more likely a mid or low end labeled chip is fully capable of handling the top rated speed, or even above.

      Also they use fairly generous safety margins. Their CPUs get included in countless different mother boards with unpredictable variations and quirks. The voltage may be a little high or low, timings may vary, signal quality may vary, and most importantly different temperatures and cooling capabilites. Also they are supplying probably a hundred billion CPU-hours, they don't want to get a bad rep if even an insanely rare multiple-failure happens to hit a critical customer on a critical system. They use pretty generous safety margins.

      Now if you're tuning a specific set of hardware with particular voltages and particular timings, and especially if you have a better than typical cooling system, then you can exactly tune the speed of the CPU. You don't need a huge saftey margin to cover huge uncertainties because there are no uncertainties. You can push the speed and maybe even the voltage a touch if you keep the CPU comfortably cool.

      Also an overclocker is probably willing to accept actually running into a once-in-1000-hours system reset if it means he can get that much more speed out of it. That's not something you want to have happen on a mission critical business server, but it is an excellent tradeoff if it gets you 1000 hours of smoother gameplay.

      Disclaimer: I have never actually overclocked myself (I've only tweeked BIOS timings), but I am about to buy a new computer and I am probably going to get a motherboard with enhanced overclocking capabilites. For just a few extra dollars and with a bit of serious geek-knowledge and and some (enjoyable) tuning and testing my system I can probably get a decent speed boost.

      Not a bad tradeoff at all. Few 'hobby' activities provide such a direct tangible benefit. Even hardcore automotive 'horsepower overclockers' only see a benefit in rare race-type conditions and no benefit at all in day-to-day driving.

      -

      --
      - - You can't take something off the Internet! That's like trying to take pee out of a swimming pool.
  2. and i'll bet 10 bucks... by hyperstation · · Score: 2, Funny

    yet another liquid cooling story is on the way!

  3. Seriously though by the_mutha · · Score: 4, Insightful

    Hardly anyone doing professional work on a machine will overclock it. Generally it just makes your system unstable and prone to crashing and making murphey's law become a reality on your precious data. Overclocking IMHO is more for gamers that want to take out as much juice as possible from their processors, and even so, it won't make that much of a difference. Generally its just for bragging rights.

    1. Re:Seriously though by Satertek · · Score: 4, Informative

      Wrong. If done right, you can have a perfectly stable machine. It does take considerable time to get it just right, and there is always some risk, which is why "professials" do not overclock as commonly.

    2. Re:Seriously though by btarval · · Score: 2, Informative
      Oh, please, spare me. I can show you a number of so-called "professional" boxes which will break under a load that I can throw at it.

      The really funny thing is that people doing "professional work" are doing so with pure blind trust in the manufacturer. Very, very few "professionals" bother with the most basic of QA. They just open the box, plug it in, and run, based on pure blind faith.

      I've worked with various computer companies, being involved with the bring-up of a wide variety of hardware, from workstations, servers, storage arrays, and what have you. The practices in this industry are generally quite sloppy. The engineering is typically rushed, the QA is rushed (and usually done by people who really don't know what real QA is). It's all about getting the systems out the door quickly, with as low cost as possible.

      Unless you've run memtest86 on your system for a while, you really don't know if the RAM you're using has some bad spots, do you? If it does, well, that means your calculations are now suspect as well.

      But no, it's easier to stick your head in the sand, and ignore that possibility.

      If you really are depending on the results from your box, you should start with the basics, at the least. Memtest86 ought to be run on every new box you get. And you should go through a burn-in cycle. Plus put a load on your system for a while, just to make certain that the thermal cooling in the case, and the room, are indeed adequate. This is just the basics, IMO. You'd be surprised at how many bad systems I catch with just that; including systems that are in a production environment.

      I can guarantee you that I can put together an overclocked system which is more solid than most (if not all) machines put out by OEMs. But that's because I know how to spec the parts, and QA them before I put them into production. Yes, it's extra work. But I've noticed that I have a lot fewer problems with my systems than other people do, and this saves me time over the long run.

      So please spare me the snobbery; it's just a mask for ignorance.

      --
      The best way to predict the future is to create it. - Peter Drucker.
  4. Already done it. by Seumas · · Score: 5, Funny

    I've already overclocked my 64 to a 96. W00T!

  5. Re: What kind of.... by zokrath · · Score: 4, Funny

    Overclocking is not something that is generally done professionally; it is a hobby, simply to show off and make one feel important. The same is true of 'tricking out' a motor vehicle, or modding a PC case, or the entire industry of do-it-yourself interior decoration.

    When rendering, and presumably other activities that might theoretically benefit from increased performance from overclocking such as data analysis and science simulations, your are often leaving the computers working overnight or over the weekend, and the last things that you want are crashes or visual errors due to unstable hardware. Sometimes I even underclock my rendering system, for it is far better for a render to take a few extra hours or days than to have the whole render wasted because somethign went wrong with your elite hacked overclocking with ten percent enhanced performance.

    Overclocking also reduces the life of the components, noticeably when they are rendering at full capacity nearly 24/7 for most of the year.

    There are certainly professionals that overclock, but they have either carefully weighed the cost benefit ratios and decided on the most logical course of action, or have had a series major setbacks and mistakes and are desperate to finish before the deadline next monday; the boss will not be happy when he finds out that another project is late because of your bumbling incompetency, Jones, so you had better move right in to your cubical for the next week, or you will find yourself moving right out, permanently. You can have that little wife of yours bring you meals; I certainly would not mind having her around the office. Maybe she will finally see reason and bail out on that train wreck of a career that you are conducting, and set her sights up closer to where her standards should be. And if not, she will still be something nice to look at. Tell her to wear something that will cheer you up...Man, this is going to be a Hell of a week. Now get back to work, Jones.

  6. If it ain't broke... by Francis85 · · Score: 4, Funny

    If it ain't broke... overclock it?

  7. Actually Overclockers... by Anonymous Coward · · Score: 5, Funny

    keep on because of a rumor that after the 4GHz barrier you can create a tear in the time-space continium... :)

  8. Increase usable life of your box by Deliveranc3 · · Score: 3, Interesting

    Gives you another few months, you start thinking about that shiney new GPU CPU and stuff and salivating, but you know it's going to drop to .3 of the price in 2 months.

    So you overclock. If you bought the low end last generation you can keep going WAY LONGER!.

    I had a 9000 pro and was able to overclock to survive DOOM 3 and CS source... didn't need a 9600 pro or XT and wasn't tempted until the 600gt showed up... now I'm good for a few more generations unless it's another really awsome one (like the 9700 pro).

  9. Not just for gamers... by John+Nowak · · Score: 5, Insightful

    As someone who does real-time generative audio/video processing, I have to say that oftentimes what a 2GHz machine cannot run comfortably, a 2.5GHz machine can do satisfactorily. 12FPS may not be good enough, but 15FPS may be passible. People often dismiss overclocking as something just for gamers, but in reality, it can be useful to anyone doing processor-intensive, real-time processing. I feel that some of the anti-overclocking opinions here are a bit unjustified, and more of a knee-jerk response to a loosely correlated l33t culture. The only games I play are Clan Lord and Civilization III... hardly a reason to overclock. However, for video processing, I need all the power I can get despite my modest budget.

  10. More is never enough. by Futurepower(R) · · Score: 2, Insightful


    LOL.

    The kind of person who, 10 years from now, when he gets his amazing new 200,000 GHz 512 bit processor with a terabyte of RAM, will say, "How do I overclock it?"

  11. Overclock AMD on HP by apache+guevara · · Score: 3, Interesting

    Overclocking on the Pentium I was fun. CPU speeds were still far far away from the GHz levels and in school, it had amazing brag value. Never matter that the recursion programs we wrote in TurboC (it was way back ... I was a kid) never seemed to compile any faster.

    Overclocked my HP Athlon 2.2GHz upto 2.5 Ghz. Noteable difference? Well, super pi http://www.computerbase.de/downloads/software/benc hmarks/super_pi/did calculate PI to 512K decimals in 49 seconds (It was 52 seconds earlier). Didnt make much of a difference to anything else that I use. (Am an MBA now ... what i use is powerpoint and outlook ... I sold out!!)

    The fact remains that overclocking is not a performance enhancement ... the results are just incremental, but they do give the kicks. Very zen!

    Remember the "Turbo" button on the machines those days?

  12. Overclocking...pffff by Spactonic · · Score: 5, Funny

    I was just happy that I could plonk a NEC V20 in my IBM XT - going from a 4.77 MHz 8088 to a whopping 8 MHz!

  13. Re:Dumb, but at blazing speed! by dr.badass · · Score: 3, Interesting

    Question: If you frigging overclockers are so frigging smart, why don't you design faster chips?
    Answer: It's bleeding hard work.


    What the hell does this have to do with anything?

    Most chips are just higher-clocked versions of earlier bretheren. There are occasionally different cores, but the difference between Chip A @ 2.5GHz and Chip A @ 2.8GHz generally has nothing to do with differences in the design, and everything to do with pricing.

    Of course the real laugher is what the overclockers do with their "extra" cycles. Nothing useful, let me assure you.

    Are you going to assure me that when, many years ago, I overclocked a 300MHz chip to 450MHz, the >50% improvement in compile times wasn't "useful"? How about the fact that I saved about $300 overclocking a cheap chip instead of buying a faster-labeled one? Did that not actually happen? I remember it so clearly, too.

    --
    Don't become a regular here -- you will become retarded.
  14. Re:Dumb, but at blazing speed! by mejesster · · Score: 5, Interesting

    I don't see why this is so fantastically irritating to you. Does it bother you when someone has a ferrari that they just drive to work or an SUV that they just drive to soccer practice? You know, it really bothers me that you have a kitchen and don't bother to cook up gourmet 5 star meals.

    --
    MacroHard - Boning you in a big way! (TM)
  15. Re:OMG. What kind of....Money does it take? by Westacular · · Score: 2, Informative

    You're about two years out-of-date. Socket 939 and 754 processors with the same performance rating are now more or less the same price. (If you ignore the non-64-bit Sempron line)

    Motherboards for both come at a range of prices, but tend to be in the standard $80-120 range. 754 ones may tend to be slightly less, but not significantly.

    Opteron processors and early Athlon 64 FX processors (which were basically rebranded Opterons) run on Socket 940 and require ECC RAM; this is natural as they're targetted at the server market. No other Athlon 64 processors carry this requirement.

    Basically, if you're looking to get a half-way decent AMD computer nowadays, there's no real reason not to get a Socket 939 processor with a PCIe motherboard; it's faster, more future-proof, and doesn't really cost any more.

  16. How do you make a AMD64 cpu go like hell? by SPY_jmr1 · · Score: 2, Interesting

    Turn the power supply on.

    Honestly, every one i've seen is so insanly overpowered, it isn't even funny...

    On top of that, people will try to overclock a cpu when the problem lies elsewhere... RAM, drives, etc.

    An 4Ghz 64-bit cpu is nearly worthless if you mate it with 64 megs of ram and a 3600 RPM laptop drive...

  17. Re:People still do that? by blackicye · · Score: 2, Interesting

    Well yeah, AMD's new "Cool and Quiet" feature, much like Intel's speedstep will lower your CPU frequency and voltage, thus lowering temperatures, and allow lowering the speed of the CPU heatsink fan.

    But the benefits of this technology are not to extend processor life, or primarily to decrease power consumption.

    Its to make your PC run quieter, most overclockers running air cooled CPU heatsinks don't really care about the noise though, and the ones that do, splurge on watercooling systems.

    I've heard (and owned) many a system which sounded like aircraft taking off when they were running (which was all the time.) Small price to pay for "free speed" :D

    One of the first things you're supposed to do when attempting an overclock on an Athlon 64 CPU is to disable "Cool and Quiet" which by default (at least for my Asus A8V Deluxe Rev.2) off.

  18. Re:Dumb, but at blazing speed! by SpinyManiac · · Score: 2, Funny

    Why would anyone need a car that travels at greater than 60 MPH?

    Because the speed limit is 70 MPH?

    --
    It's never too late to have a happy childhood.
  19. To be honest by BlightThePower · · Score: 2, Interesting

    I'm beginning to wonder if the pendulum has swung to making underclocking the smarter move. Certainly I've never had as stable, cold and quiet a machine as when "Cool 'n' Quiet" (on my MSI NForce 4) is kicking in (dynamically lowering the multiplier). You might say I should have bought a slower cheaper machine in the first place but just sometimes (DAW stuff, those VSTis can be hungry beasts) I need the grunt, but not all the time.

    --
    Plays violent online games as: Nerfherder76
  20. Re:Overclocking by gl4ss · · Score: 4, Insightful

    lifetime?? the average lifetime is well beyond the time the chip is worth anything.

    *Few people get lucky because they need to mark some chips at lower speed than they are truly capable and they keep certain margins on the chip timings to ensure it works.* quite a lot of people "get lucky" as you put it. on a64's you often see 300-400mhz overclocks, that's not much unless you look into the cpu prices and how they hike up at those 300-400mhz. and those run whatever test you want for 24/7.. i got a k6-2 300 that has run at 450mhz for something like 6 years or whatever year they were introduced.

    overclocking is not worth it usually when you buy the machine.. but ironically.. INCREASES THE LIFETIME as you can use the chip some time longer to play games etc, comfortably.

    --
    world was created 5 seconds before this post as it is.
  21. Re:It's not working for me yet... by adamh · · Score: 2, Funny

    I think you've just described underclocking.

    Try putting the clocks on top of the case.

  22. Re:Dumb, but at blazing speed! by Tore+S+B · · Score: 3, Insightful

    Does it bother you when someone has a ferrari that they just drive to work or an SUV that they just drive to soccer practice?

    Yes, it fucking well does - that's environmentally irresponsible.
    Yes, it would hugely annoy me and I would most definately make a point of it.

    Really bad analogy :P

    --
    toresbe
  23. Re:So many peope talking out of their ***... by KenBot_314 · · Score: 2, Insightful

    Your time is worth money, too.
    That is something I never understood. Why would I want to waste a day making my computer work just as good as something i could have bought for $200 more?