Author: Aaron Gordon
Date: 12:30:26 07/08/03
Go up one level in this thread
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. :)
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.