Author: Aaron Gordon
Date: 11:15:50 01/07/02
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You don't have to use liquid cooling.. but for me liquid cooling wasn't that expensive. As far as overclocking a dual system.. well.. that is a bit difficult if you want to push it hard. :) You'd need a PLL mod and a board that you can change the voltages of the cpu's (unless you can voltage mod the IC). This is a bit too much for most people. Modifying a dual box in the way I just mentioned is only for the brave. :) You could read up on the various upcoming dual Socket-A boards and look into their overclocking features. As far as liquid cooling being expensive... it's not really. You can go to www.dangerden.com and pick up a Maze-1, Cube radiator, pump, etc for not nearly as much as you think (around $150 max). Also you wouldn't need a water tank & etc, if you use an inline pump you can just run the water directly through the pump instead of having the pump in a reservior of water. Also it really wouldn't be cost effective for you to try to liquid cool that dual system. Your best bet would be to get two Thermalright SK6's with the 60mm YS Tech 40cfm 7k rpm fan. This combo is rated at 0.14C/W. At 0.14c/w any cpu will be cooled very well.. even overclocked beyond 100 watts (AthlonXP 1900+ is only 68 watts max). To give you some idea how well an SK6 does with various cpu's using simple math I can figure it out for you. Lets say you have an Athlon XP 1900+ @ 68 watts and your ambient case temp is 24C/75F. At 0.14C/W the CPU's maximum temp would be 31.52C/88.74F. Lets say you decided to crank the chip as hard as you could... to 2.1 volts & 1.9GHz. Well, that puts the 1900+ at 116.28 watts. SK6 would keep the 116.28 watt CPU at 40.3C/104.5F. If you'd like to compare that to your average 0.40c/w heatsink fan (tons of people have these) that overclocked Athlon XP would be over 70C/158F. On January 07, 2002 at 07:14:28, Vincent Diepeveen wrote: >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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