Quote:
Originally posted by kai
What about , if you buy a brand new say pure copper heatsink test it , to see if its flat when you first get it . Use it in a say 1.4ghz tbird the hottest you can find. To see if the constant heat and pressure from the clip and chip warp the heatsink. Ive always wondered this .
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The softness of copper isn't dramatically affected by increasing the temperature to ~90°C, which is higher than you could get the copper without crashing the PC. Along these lines, however, I've seen the AMD die engraving quite clearly in the base of heat sinks after a few weeks of running. This leads me to believe that there is a threshold beyond which additional "zero stress state" flatness yields no benefit. I don't bother with P4s and AMD doesn't yet use an IHS, so I'll not comment on the relative flatness or lack thereof on IHS plates.