Author: Mr j smith
Date: 12:40:39 07/08/03
Go up one level in this thread
On July 08, 2003 at 15:30:26, Aaron Gordon wrote: >On July 08, 2003 at 09:48:26, Rajen Gupta wrote: > >>i have noticed on all 3 of my overclocked computers that certain chess engines >>don't run well, in particular junior 8/ hiarcs8 & shredder 7/704. >> >>on a single overclocked comp if any of the above engines are running; the >>computer will either reboot/ freeze/ crash or give an error meesage, after >>playing only for a few hrs.this happens each time i have tried to play eng vs >>eng matches using any of the above engines. >> >>these comps have been stable for all other programmes, inculding chess >>programmes; i have been able to play the following engines-the king engines >>(both 3.12d and 3.23); fritz8/7 df7/ the tigers for weeks on end in eng vs eng >>matches without the above problem; >> >>initially i thought that the problem was with the software but after setting the >>hardware to default settings; junior8 vs f8 are running smoothly for well over a >>week. >> >>i am particularly interested with AMD overclocked systems as i plan to buy an >>overclocked modified dual (XP modified to MP guaranteed to run at 2400 mhz) > >Just sounds like you're overclocking too much. Could be you need more voltage to >the cpu, you need better cooling, the chipset/ram can't handle the FSB you're >trying to do, your PCI/AGP could be too far out of spec, etc. Could be a number >of things. > >If I were you I'd grab CpuBurn @ http://users.ev1.net/~redelm/cpuburn4.zip >Also get Prime95, available at ftp://mersenne.org/gimps/p95v2212.exe > >Run each of these for 24 hours at the speed you believe is unstable. Also, test >your memory at... http://www.memtest86.com > >If you're pushing the chip higher via FSB you could be keeping your ram timings >too tight and while the ram may be able to do the speed you're running, the >timings may just be too low. Try testing with Memtest86. If you get errors relax >the memory timings and retest. If you still get errors drop the fsb or up the >voltage to your memory (if you have that option). Don't go above 2.9v for 2.5v >DDR. People have run 3.0-3.5v.. but 2.9v is the maximum 'safe' voltage for >extended operation (years & years). > >Also if you want to get accurate temperature readings get one of these: >http://www.bestbyte.net/Product.cfm?ProductID=525&CategoryID=8&Keyword=nurse > >Motherboard sensors are more often than not very wrong. I have 11 operational >computers in my house that tell CPU/board temp.. and not a single one is >accurate (not even within 5C). The one with the most difference is the Asus >A7V266-E, which shows 21C too high.. followed by two Abit KT7a boards that are >both 15C too high. Just slide the comp-u-nurse sensor between the PGA of the CPU >and the heatsink up against the side of the cpu core. This will give you a very >accurate reading. > >Basically, just play with your hardware (not like that) and see what can do what >speeds. When I first build a computer I like to see what the CPU can do, the >ram, chipset, etc. Once you figure out the limits you can then figure out the >best multiplier/fsb combination to get maximum performance. If you want to keep >it simple just run BurnK7 and Prime95 (not at the same time of course) and if >you get errors, lockups, reboots, etc.. keep backing off until you can get it >stable for 24 hours. > >If you want to put your hand (or a book or something) over the fan to >artificially increase the temperature of your CPU that would work as well. If it >runs seemingly stable at 65C (even 10 minutes of Burnk7/prime95) it'll >definitely be rock solid at 40C. Just make sure you keep the heatsink free of >dust and etc, or you'll be visiting 60-70C again. :) The only thing I would add is that playing with a chessprogram stresses a cpu more than Prime95 or any of the other stress utilities. If your computer can play an 80 move game of at least an hour to an hour and a half with any of the commercial engines and not reboot, then you have proper cooling and the system is stable.
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