Author: Aaron Gordon
Date: 21:32:27 03/04/02
Well, I finished the project. Had to get some sleep, the insulation for the CPU & the chipset was taking much longer than planned. Anyway after replacing the standard heatsink/fan on the chipset with a 172(24v) watt peltier running at 129(17v) watts & a custom 2x2x2" aluminium (wish I had a copper one) heatsink with a 7k rpm delta fan and replacing the water in my liquid cooler unit with flourinert I was almost ready to go. After dropping in the dry ice into the reservior of flourinert I watched the digital sensor drop lower and lower (it have an external sensor on the side of the CPU core with a digital readout in the front of the case)... once past -40C it just read LLL. I let it circulate for a bit more (while keeping the peltier on to bring the chipsets temp down). Since I had all of the PCI devices removed I wasn't expecting too many problems (except maybe from the onboard HD controller) with high fsb's. I did disable DMA on the hard drives to be safe. Also had to set the ram timings from CAS-2 to CAS-2.5. This memory is suppose to do up to 170 or so at CAS-2 so I figured it should be able to do a little over 170 at CAS-2.5. I also had a 47k ohm 1/4 watt resistor on the Vfb ic leg of the voltage controller to help provide more voltage (2.11v) to the CPU. The maximum speed I was able to attain was 12x multiplier, 176.79 fsb(353.58DDR). This is 2121.46MHz. Unfortunately it would just plain not run in Windows XP. This is the main OS I use since it's a bit faster than Win98se. I do have Win98se dual booting with WinXP so I managed to use that. It wasn't 100% stable but it was more stable than WinXP was at the time. The end result was 1667 Fritz7marks at 1172kN/s. I have a screenshot here.. ftp://speedycpu.dyndns.org/pub/chess/xp-fritz7.jpg Old FritzMark on this setup is 1378 at 1985kN/s. Screenshot @.. ftp://speedycpu.dyndns.org/pub/chess/xp-fritzold.jpg All in all this was pretty fun. I wasn't able to get pictures this time unfortunately but I have a slew of pictures at ftp://speedycpu.dyndns.org/pub/overclockstuff/pics/ (and in the pics/athlonxp/ dir). There will be future projects and more pictures to come (for anyone that cares). When I try something like this again it will be when I get a better CPU and motherboard. I'll get more dry ice to be able to run more tests. I was only able to get the system up and running stable then to run the Fritz6gui(Fritz5.32Mark) mark and the Fritz7mark before the dry ice melted. To the person that posted the message.. there probably won't be anything out for quite some time that can get 1600-1700 Fritz7Marks so hold your cash for now.. Try not to be tempted with dry ice either, it's a (very) temporary cooling solution. I'm going to tough it out until AMD SledgeHammer arrives.
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