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  #1  
Old 02-06-10, 11:03 PM
siravarice siravarice is offline
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Thermal paste to lapping? Don't be silly...

So I finally got my arse in gear the other day to sort out the thermal paste and reseat the CPU cooler. When I took it off this was what I was greeted with:



One of the pipes not really covered that well and generally there wasn't great coverage on the CPU either.

So after taking the CPU out and cleaning it, I thought, well I've got 240 grit Wet/Dry in the cupboard, why not lap it? So it all went downhill from there really....

My first session with the 240 grit stuff



This is where I notice just how NOT flat processors are. Silly Intel. After lots of rubbing I realised I didn't have a higher grit value sandpaper. So off to Halfords it was.



With all that sorted it was time to get cracking. Luckily I was watching the Grand Prix and mindlessly rubbing in circles, so it seemed like no time at all. The end product after about two hours of total sanding and rubbing, cleaning and sanding again, is this:



Notice there are still silver parts, still not flat! This picture didn't really do the finish justice, so I took it out for another one without the flash....



Temps dropped 13 degrees afterwards, and I used much better thermal paste this time. The stuff actually glitters silver.



What do people think?

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Old 03-06-10, 06:22 AM
Steve-O- Steve-O- is offline
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Your a brave man. Very brave indeed. :P Good stuff.
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Old 03-06-10, 08:01 AM
siravarice siravarice is offline
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Yeah it helps!
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Old 03-06-10, 10:35 AM
alexhull24 alexhull24 is offline
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Well done, you got a really impressive temperature reduction. I was surprised how far from flat that IHS is. I've had the same thing with all my Core2 chips so far actually, lapping is probably a good idea with Intel at least, if you're not worried about resale value of course.

I also use AS5, it's a really good TIM, though if buying new I'd go for MX-3 now. Better performance and easier to apply imo. AS5 can be a bit stiff at times.
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Old 03-06-10, 10:59 AM
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tinytomlogan tinytomlogan is offline
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You need to get ALL the lines out of the cpu fella. go over with the 1500 LOADS more, you can get the IHS to look like a mirror

AS5 is old school now though, MX3 is way better. Ive actually started to use the Noctua stuff of late and its as good as MX3 if not better .... BUT its much easier to use
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Old 03-06-10, 01:36 PM
siravarice siravarice is offline
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I was going over it with 1500 for about 30 minutes Tom. I need lubrication paper, not just more rubbing with the same grit sandpaper!
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Old 03-06-10, 02:23 PM
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tinytomlogan tinytomlogan is offline
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Trust me fella those lines are not from the 1500

You deffo need to do the 1500 more then move on to 2000 grit. It feels like normal paper but it does work. making the cpu a bit damp helps too.

When I was a mechanic I use to polish motor bike frames and car parts in my spare time, so metal polishing si something Ive done ALOT of
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Old 03-06-10, 02:34 PM
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FragTek FragTek is offline
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Let me see if I can find my lapping post from back in the day.... I mirror shined an A64 back in the day for my watercooled rig and it made a huge difference.

Can you removed the IHS on these new Intels? That's really the way to go....
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Old 03-06-10, 02:43 PM
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FragTek FragTek is offline
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This is what it should look like when it's done.....





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Old 03-06-10, 03:05 PM
pazman4 pazman4 is offline
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Wow, thats some dam shiny metal, good job.
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