----- Original Message ----- From: <[EMAIL PROTECTED]>
To: "G-List" <[email protected]>
Sent: Saturday, February 05, 2005 4:07 PM
Subject: thermal grease, heat transfer tape...
Id like to see my beige (350MHz G3) running at 400MHz, but when I tested
it it froze during some heavy duty photoshop. I have a fan installed and it
seems to be running very nicely on 83MHz bus, and 375MHz. Im using no thermal
grease or heat transfer tape. Anyway, Id like to know which of those 2 are
better, as no matter what computer I have, it will be as overclocked as I can
stably and affordably get it.
Thanks
Chris
It all depends on the surfaces you're trying to match.
Thermal pads/tape transfer better than an air gap, and can fill 'large' gaps and still be effective. They are a pain to remove/clean, and require the disipline to 'stick it and forget it' unless you have lots of spare tape.
Thermal compound transfers heat better, but doesn't deal with large gaps as well.
Ideally, you want the cpu core surface to be a flat plane, and the heatsink surface to match. If I recall, Apple usually does not buy CPUs with intergrated heatspreaders on the cores, leaving you with an epoxy bubble to mash your heatsinnk onto. For this application, a thermal pad is going to be your best option, if you don't want to put any effort in...
You CAN lap down the epoxy to provide better contact between the core and heatsink, but it requires patience and an understanding that you may wreck the core doing so. The key is to not go too deep. : ) If you're up for it you can get awesome heat transfer with just a drop of thermal compound.
Oh, and thats the other tidbit, absolute best is when the heatsink and heat source have perfect contact. Thermal tape and compound are for times this doesn't occur. The key is to use the bare minimum to mate the two surfaces. You're not doing stucco designs, think minimalist. The more material you stuff between the cpu and heatsink, the hotter that core will run.
Joshua Coombs
-- G-List is sponsored by <http://lowendmac.com/> and...
Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- We have Apple Refurbished Monitors in stock! | & CDRWs on Sale! |
Support Low End Mac <http://lowendmac.com/lists/support.html>
G-List list info: <http://lowendmac.com/lists/g-list.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[email protected]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/g-list%40mail.maclaunch.com/>
iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
