Originally Posted by INCREDIBLEHULK
any of you fellows lapped your chip after delidding?
curious if you saw an additional decrease of a few or of many degrees and if it was hard to do with just the ihs, also how hard is it to clean the clu off the IHS/.DYE ?
first times for somethings are really not fun especially when could be a costly mistake
Cleaning CLU or CLP is very easy off the die. Just takes some isopropyl alcohol.
Tjj226 gave you excellent info about lapping. I have lapped my IHS after delidding because they were particularly warped, but only one really needed to be done. I don’t think I got any better temps with the other.
I believe all modern coolers are slightly convex to fit better with your IHS because almost all of them are slightly concave. You can confirm this with a straight edge (like a razor blade) and a flashlight. The problem is that the force of clamping your chip down to the mobo actually changes the shape of your IHS.
Therefore, even after lapping your IHS it will not be perfectly flat once you clamp it into the mobo. Also, as already mentioned, lapping the IHS does nothing for your cooler which is most likely slightly convex.
I only recommend lapping if your IHS is particularly warped, extremely convex, or concave – which is unlikely. You can lap your cooler too, but that usually voids the warranty. Basically there is no reason to lap your IHS unless you have confirmed with multiple tests that your IHS to cooler contact is particularly bad and would benefit from lapping.