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Ultimate Cooling System
OCGeek writes "This should be interesting for the overclockers as
VR-Zone has an article up on building a
cascade cooling system that
cools chips down to -110C. The guide shows you the components that are required
for the cascade cooling system such as the compressors, condensers,
refrigerants, evaporators, heat exchangers, oil separators etc. and the tools
you would need. It allows hot chip like Prescott to reach over 5.1Ghz and ATi
Radeon 9800 XT card to reach over 660Mhz core."
1. Because it's possible
2. It's kinda cool (literally0
3. It keeps overclockers off the streets
4. It gives us something to do
5. It's just interesting
6. Performance!
In a controlled situation, you wouldn't have any problems with condensation. I imagine when they turn the coolers off, they would want to bring the temperature back up to room temperature via a controlled sequence. You will get condensation if you go from that cold to warm rather quickly.
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This seems a little complex and extreme for the home builder. Maybe a specialty co-lo opportunity, though? "Icebox netbox"? No good for gamers, of course. But for others who need MIPS for problems that can't be parallelized...
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For the ATI radeon overclock, no. For raw CPU power, probably, but a video card (generally speaking) needs to be fast on its own. I don't think you CAN piggyback a whole bunch of video cards to gain such speed improvements. Hell, I bet with a 660mhz core, that card could run Doom3 at 3 fps! That's INSANE.
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http://www.google.com/search?q=cache:M3MveYmm8lQJ: www.vr-zone.com/%3Fi%3D618%26p%3D1++site:www.vr-zo ne.com+cascade&hl=de&ie=UTF-8
Zero degrees isnt enough. The lower the temprature, the easier electrons move and the faster gates switch. If you were to try to get a prescott to run at 5.5ghz normaly, it would result in errors as the gates wouldnt switch fast enough to keep up with the clock. With this level of cooling, it's no longer about heat concerns, but the speed of the logic gates.
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Sluggy Freelance.
Sounds suspiciously like they stole the technology from Michael's computers...
The bottleneck is usually not the network card, it's the internet connection, or the rate at which you're going to utilize data (say when streaming.)
The only time overclocking helps is when you've identified a processing-time-related bottleneck.
Incidentally usually a 10baseT network maxes out at about 8Mbps with no collisions. Many of the older 10baseT devices were only capable of pushing a megabit or so. So, just getting a more efficient network card and somehow prioritizing up network traffic will already provide you more bandwidth.
"You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
Woohoo, that's hilarious. Awesome post my friend.
"...and I got my harddrives up to 21.2K rpms. You should hear her boot up, man... It's like something out of a freakin' movie... and I uped the voltage on the monitor, too. I gotta wear welder's glasses to freakin' check email, d00d... It's the best," said the greasy yongster between mouthfuls of pizza.
"Hey, did you up your typematic rate on the keyboard yet?" his friend asked excitedly. "One guy on the forums got his up to 1200 csp. That's uber as shit..." His words trailed off as the nubile 17 year-old waitress passed the geeks' table.
"..." remarked Pete, the greaser.
How do you overclock the user?
My hyperlinks aren't worth the paper they're printed on.
These techniques seem like brute force schemes to deal with the thermal resistance of chip packages -- you have to cool the heatsink to -110C in order to keep the "intel inside" at less than +60C). Why not use backside thinning. to bring the hot circuits of the processor within microns of a high coolant flux chamber. Backside thinning could get the coolant to within 10 microns of the junctions. If the CCD people can thin a massive 2k x 2k CCDs (the die is bigger than 1" square), I'm sure an enterprising overclocker could thin a Pentium.
Two wrongs don't make a right, but three lefts do.
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Won't work in the summer, but you'll be too busy trying to scrape mosquitos out of your cooling fan to care.
>How do you overclock the user?
I believe they attempt this in Florida and Texas a lot it involves something called "old sparky.
To date all overclocked users end up dead though.
Now this is the ultimate cooling system... =)
The last part of the video (the flower thing) is even scary!
While I don't work at a microprocessor company, I do work on the physical implementation of mixed-signal ASICs and I'm surprised these CPUs can work at -110C. As I recall even military limits only go down to -50C (at the maximum allowable voltage, usually no more than +10% of nominal) for design timing closure; beyond this (higher voltage and/or lower temperatures) the flip-flop to flip-flop paths may get fast enough to result in a "hold-time violation" . This is when the signal from one flip-flop reaches a downstream flip-flop so quickly that it is registered one clock-cycle early (basically, it is captured on the same clock edge as it was launched). This is most critical on timing paths with no combinational logic (occurs often in shift registers and cross-clock domain synchronizers) and is further complicated by clock distribution networks that take advantage of "useful skew" to borrow time from one timing path for use on another. I'd be surprised if even CPUs were designed with enough hold-time margin built-in to handle -110C.
The other variable is the fabrication process corner, so assuming the CPU isn't on the edge of being "fast" there could be some hold-time margin on a given chip to allow this kind of cooling to result in a working processor. Still, I'm kinda surprised it works at that temperature with any reliability.
- Leo
You don't use science to show that you're right, you use science to become right.
your eye has 2 parts, rods and cones.
cones are the colour receptors (iirc) and do have a "refresh rate" of about 30fps.
rods, on the other hand, are the b&w receptors. the rods "refresh" at closer to 60 fps.
this is why most people can see a flicker with a 60hz monitor but not with 75hz and up. its also why people can see the flicker from flourescent lights.
your eye has a higher density of cones near the center of your vision, but a higher density of rods near the peripheral. this makes your peripheral vision more sensitive to flicker (one of my old bosses cant see 60hz flicker if he is looking at it, but can if he is looking beside it).
honestly i would say that if you could do 75hz refresh on the monitor with a video card capable of doing a consistent 75 fps throughout the game (which currently is not the case) then you would have about as perfect of a look at the game as you can get.
i can see a big difference between 30 fps and 60 fps, but beyond the 60fps i cant hardly tell anything different at all (even with 120hz refresh)
60 feels ALOT smoother than 30 (was tested using a game where keeping 60fps was not an issue given the hardware that was being used) but both are playable.
a bigger issue is probably the fact that on a modern game if you peak at 30 you hit lows of 5, so peaking at 150 would give you a low of higher than 30.
I was a sysop for a BBS back in the dark ages before Internet, and one of users once asked me if it was possible to overclock a modem to get higher speeds. I promptly answered: "Do you have an external modem? Good, just replace your current transformer with something that gives you more volts for your modem." He thanked for advice and logged off.
He never called back.
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