Smoken Joe Posted January 25, 2007 Posted January 25, 2007 The new Conroe integrated heat shield is not very flat I was getting very bad temps even on water. Here are some Pics What I did make sure you place the sandpaper on glass or some other flat surfaceand rub the cpu on the paper. Doing it the other way around can make it less flat than it is originally. The surface is smooth enough as it is polishing past 600 grit is only for show. I started with 220 Grit sandpaper for about 5 min with lots of breaks. 320 Grit again for about 5 min. 400 for about 3 min 800 for about 2 min Mothers Metal polish for about 1 min. Clean up 5 min with 91% alcohol or better with Q tips. Do it right the first time or you could be in for a big disappointment. 12C off my reported temps both under load and at Idle before letting the TIM. Original note margin: 220 grit note edges 320 Grit 400 Grit After Mothers Share this post Link to post Share on other sites More sharing options...
Gipse Posted January 25, 2007 Posted January 25, 2007 Nice work I tried to lap my notebook cooler yesterday and gained nothing... Gipse Share this post Link to post Share on other sites More sharing options...
Smoken Joe Posted January 25, 2007 Posted January 25, 2007 Thanks. The Intel stock heatsink is round and in the middle of the IHS. It looks like they made it uneven by design. Lapping an AMD wont help anywhere this much. Even removing the IHS did not help as much on the Ultra D. Share this post Link to post Share on other sites More sharing options...
Thasp Posted January 25, 2007 Posted January 25, 2007 I've read a lot about this. Is this for all the new Intel CPUs(including kentsfield and allendale), or just conroes? I'm mainly interested in allendale. Share this post Link to post Share on other sites More sharing options...
Chump Posted January 25, 2007 Posted January 25, 2007 Nice job I had heard the IHS was poor on the C2D but I didn’t realise they were 12oC worth of poor that’s a mega difference. Share this post Link to post Share on other sites More sharing options...
fmc_boss Posted January 25, 2007 Posted January 25, 2007 Wow - i thought my IHS was bad to begin with... that one of yours is very 'square in it's concavity', where my older e6400 was round in this respect. Share this post Link to post Share on other sites More sharing options...
radodrill Posted January 25, 2007 Posted January 25, 2007 Does anyone know if the P4 5xx CPUs are this bad as well; if they are I'd consider lapping mine. p.s. great lap job Share this post Link to post Share on other sites More sharing options...
Smoken Joe Posted January 26, 2007 Posted January 26, 2007 The old P4's were flat or close enough that it did not make much of a diffrence. It was pretty obvious looking at the TIM after removing the sink you can also gently rub it agenst some fine sandpaper it will make just enough of a mark to see the pressure points if there are any. I spent way more time than I need to I just dont like doing it twice. Share this post Link to post Share on other sites More sharing options...
centy Posted January 26, 2007 Posted January 26, 2007 Nice job, looks smooooth in that last image. Share this post Link to post Share on other sites More sharing options...
p0tter Posted January 26, 2007 Posted January 26, 2007 Nice work, the C2D are a little easier since they have no pins to worry about. Share this post Link to post Share on other sites More sharing options...
zarathrustra Posted January 26, 2007 Posted January 26, 2007 I see all the IHS's that are lapped seem to be slightly concaved stock. Is this just poor design, or is it to compensate for heat expansion in the center of the IHS, directly above the core? Surely the center of the IHS but get hotter than the outside of it. Although with that kind of temp drop, it's obviously a poorly designed expansion tolerance, or just bad manufacturing. Share this post Link to post Share on other sites More sharing options...
Retrospekt Posted January 26, 2007 Posted January 26, 2007 To the people asking about P4's. You should always get a considerable difference when you lap your processor. They are always somewhat concave. Share this post Link to post Share on other sites More sharing options...
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