Author: Vincent Diepeveen
Date: 04:14:28 01/07/02
Go up one level in this thread
On January 07, 2002 at 01:11:39, Aaron Gordon wrote: At single cpu systems for hobby computers definitely overclocking is something one could try (if you have watercooling or other liquid cooling), but how do you plan to overclock a dual system? I have Tyan S2462 and 2 cpu's 1.2Ghz. That's 2.4Ghz whatever you say. MP processors are incredible expensive in netherlands. the 1.6Ghz one is like $400 here a piece (and still you have to wait a month for it to get delivered). But 2x1.2Ghz is in Ghz always more than 1x1.2Ghz overclocked of course. I looked into watercooling but it's not so cheap and easy as some say it is. I need a 12 centimeters fan for example. A big radiator, 2 real expensive socket-A copper things. pipes, space, watertanks (2 of them or a real big one). And i need to be real good in installing it too. All together to overclock with watercooling $1000 perhaps? >Instead of spending tons of money just do a little research in overclocking. If >you know what to look for you can find the right CPU that will do much more than >it's rated AND have it last for quite some time. My past overclocking >experiences included a Celeron 300a @ 644mhz, Celeron 366 @ 735mhz, Celeron-2 >566 @ 1202MHz, Thunderbird 1Ghz at 1.7Ghz and this Athlon XP 1900+ 1.6Ghz @ >1.81GHz (will get more out of this 1900+ soon). > >When I say look for the right stuff I'm mainly talking about cpu steppings or >some type of marking on the CPU itself. Currently for Thunderbirds the best >stepping is "AYHJA". The second best is "AXIA". With a few tools you can take an >ordinary 1Ghz Tbird and have it beat a stock 1900+. AYHJA's are superb as they >run 20% cooler mhz for mhz than any of the other Thunderbird cpu's. All 1.4Ghz >Thunderbirds are AYHJA's. It's just a hit/miss between AXIA/AYHJA now days on >the 1Ghz, 1.2, & 1.33Ghz (all C models). Here is a good way to get started. Take >an Epox 8KHA+ for $100, a 1Ghz AXIA or AYHJA Thunderbird for $70, 256mb stick of >PC2100 DDR for $50, $30 for a Thermalright SK6 (0.14c/w) with a 40cfm 60mm fan >and 50 cents for a pack of 220k ohm 1/4 watt resistors. > >Stock the system may not look like much.. but both the AXIA & AYHJA pack some >power. The AXIA normally does 1.5GHz at default voltage, 1.6-1.65ghz w/ the >voltage mod. AYHJA does 1.6Ghz w/ default voltage, 1.7-1.75Ghz w/ a voltage mod. >For $429.50 you can build a good overclocking 'base'. With what I have mentioned >you could run 1.7GHz after the voltage modification (with pomona clips you don't >even need to solder!). Later on when the various Athlon XP chips get cheaper >guess what? Slap in a 2000+ or whatnot and push it up towards 1.9GHz w/ the volt >mod. Beats spending $3000 for a top of the line system but having a motherboard >that can't overclock for crap and thus wastes your cpu's potential. > >If you're wondering about dangers to the chip itself.. don't. If you're using >good heatsink compound (Arctic silver, Arctic Silver 2, Arctic Alumina, & the >Metal tube (not plastic) Radio shack compound) with the SK6 (or similar, 0.14c/w >or lower) you won't have problems with CPU failure. The damage is due to >electromigration.. and that is accelerated by heat. If you keep your CPU cool >even overclocked beyond belief it will last a long, long while. An Intel >engineer told me once that for every 10C a cpu is dropped the lifespan is >doubled. I had the formula but unfortunately I forgot it. Perhaps one of you >guys in here knows it.. Anyway. Even if you run a 1Ghz AYHJA which basically has >a 1.6Ghz core (just marked as 1.0, 1.2, 1.33, 1.4, whatever) at 1.75Ghz, 2.2v at >35-40C full load it should last longer than someone with some cramped pre-built >company computer with a subpar heatsink/fan that lets the CPU run idle at 60C. > >If anyone has any questions/comments reguarding this post feel free to email me >(as I'm sure it will lead to non-chess related stuff). I updated my email >address to a working one.. so anyone in the past thats tried to email me feel >free to do so (as I will finally see it:).
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