arctic cooling freezer 7 pro - lapping question

[rookiE6400]

hello everyone,

i noticed my E4300's IHS is VERY U-shaped (like extreme sport's half pipe! ok... not that extreme...)

how i found out is, when i re-mount, i cleaned off the MX-1 (very good BTW, keep it) and applied a very very thin layer of AS5 on the freezer 7 pro, and within seconds, BIOS shutted power due to overheating. i took off the freezer 7 pro and saw only 2 edges of IHS has AS5.

so i am planning on lapping the IHS, but while i am at it, i also want to lap the freezer 7 pro as well

so, has anybody successfully lapped a freezer 7 pro?

please advise, thanks!

 

[tool_462]

You may want to think about RMAing the CPU if it is as bad as you say it is. I have an Arctic Cooling Freezer 7 Pro sitting around somewhere and the base was perfectly flat, not mirror reflection by any means but as flat as you will get with lapping.

 

[Mondoman]

You may want to think about RMAing the CPU if it is as bad as you say it is. ...

Yes, lapping is great for smoothing the surface, but getting rid of a noticeable curve in the surface is difficult, and may damage the heat spreader.

 

[woodchuk]

If the surface that contacts the CPU is visibly warped, it's junk. The only cure for a very slight(.001 or less) uneven surface is to lay it on a sheet of 1500 or so wet and dry sandpaper that sits on a perfectly flat place and burnish it down until the center square inch or so will contact the CPU 100 percent.

 

[tool_462]

If the surface that contacts the CPU is visibly warped, it's junk. The only cure for a very slight(.001 or less) uneven surface is to lay it on a sheet of 1500 or so wet and dry sandpaper that sits on a perfectly flat place and burnish it down until the center square inch or so will contact the CPU 100 percent.

The definition of lapping...