Author: Ed Panek
Date: 07:48:39 07/19/02
Go up one level in this thread
On July 19, 2002 at 07:42:15, Aaron Gordon wrote: >On July 19, 2002 at 03:55:00, John Smith wrote: > >>epox 8k3a. Can't be beat for price and performance. Www.newegg.com has em for >>$ 89 plus $10 shipping fed exp. >> >>Has voltage settings in bios up to 2.20 so you can crank up the amd processor >>till it can't take it no more and begs for mercy. > >Need to be pretty careful with the voltage on the 0.13 micron AthlonXP's. I >wouldn't go above 2.05v or so. Would create too much heat in a small area. You'd >need one of the Thermalright heatsinks (or perhaps the Alpha 8045 or MC462). >Thermalright SLK-800 would be best though. Should be available in perhaps a week >or two. > >As I was saying about the heat output in a small area. The current Palomino core >is 128mm². Thoroughbred core is 80mm². The AthlonXP (Palomino, 1.75v, 0.18um) >2100+ is 72 watts where as the AthlonXP (Thoroughbred, 1.65v, 0.13um) 2100+ is >67.9 watts. Now according to this everything looks fine.. just slap it in and >it'll run cooler. Unfortunately not. Some of you may know where I am going with >this.. > >This would mean the Palomino has a power dissipation of 0.5625 watts/mm². The >Thoroughbred would be 0.84875 watts/mm². While it appears at first (due to a >lower wattage) it'd run cooler in all actuality you'd need one heck of a copper >heatsink. I'd like to see some sort of silver heat spreader put on those chips >or perhaps even silver bottomed heatsinks however those would be rather >expensive.. :) Best bet would be to make some small silver heat spreaders.. >perhaps have them sealed to the core via Arctic Silver 3 & epoxy.. lap it >totally flat. Should work great. > >Anyway, be careful if you overclock. Make sure you use silver based compound & >remove ALL thermal pads from the heatsinks. It comes off best I've found w/ >lighter fluid. Just make sure you wipe the heatsink down before installing it :) >Also remember.. don't push the 0.13's more than 2.05v, the older 0.18's can do >2.2v easily though. Expect things to get only worse.....The smaller the chip the more wattage per mm needs to disapate..so its worse as chips get smaller. Maybe soon we will see 2 chips per die...A multiprocessor PC with one socket! Ed
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