Author: Slater Wold
Date: 23:36:43 03/04/02
Go up one level in this thread
On March 05, 2002 at 00:32:27, Aaron Gordon wrote: >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. Just in case someone forgot to tell you, you're nuts. :) 1490k/ns is as fast as my 1.6Ghz will go (Fritz 5.32 Fritzmark). 520Mhz will get you about 500 more nps. Or 90k nps in 3 minutes.
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