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I would like to know if there is a way to restore the "perfect flat" surface of a heatsink(the part that actually comes in contact with the CPU). Like if it had small grooves in it or something, how could I fix that?
 

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How could you fix small grooves? Do you mean, like the grooves are actually cut out, or it is just bent, and you need to bend it back?
 

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Small grooves prolly do not matter... 1-2 cm long any direction a hair or 2 deep wont make any different... AS5 fills in the gaps... if these grooves are deap your going to have to do some sanding and possibly some mounting modding
 

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Oh, I see what you mean. OK, well yeah filing (file+ing) them down is good for kinda big grooves. But for the big ones, I would either get a new heatsink, or cut it off, and file it down to a smooth flat surface.
 

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use this lapping kit, it is sanding the surface perfectly flat and polishing the surface mirror smooth,it can drop your temps about 2-3 c too...... check this site for a good lapping kit...http://www.easypckits.com/
 

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Lapping is taking a very fine piece of sandpaper and making the surface super flat and shiny It will also transfer heat better, But you cannot lap the heatsink to much for really deep grooves or it might fit loose, but under normal lapping conditions it will not be loose. You can get lapping kits on frozencpu.com website.
 

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Quote:


Originally Posted by gcraw5100

Lapping is taking a very fine piece of sandpaper and making the surface super flat and shiny It will also transfer heat better, But you cannot lap the heatsink to much for really deep grooves or it might fit loose, but under normal lapping conditions it will not be loose. You can get lapping kits on frozencpu.com website.

Not JUST a fine grit sandpaper, but multiple grits.

From 400 to 2000 (I think), there's about 5 variations between 400 to 2000 that you should get to lap it, and you take a marker, and make an x on the surface, make a figure 8 motion on a sandpaper that is fixed to the desk so it won't move.
 

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Quote:


Originally Posted by lightsource

Not JUST a fine grit sandpaper, but multiple grits.

From 400 to 2000 (I think), there's about 5 variations between 400 to 2000 that you should get to lap it, and you take a marker, and make an x on the surface, make a figure 8 motion on a sandpaper that is fixed to the desk so it won't move.

ya pretty much, but you dont want to do it on a desk... you want to do it on a piece of glass to insure that it is super flat...
 

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ya u usaully wanna buy a premade kit cuz it is cheap and works well, but if your like me and have tons of leftover sandpaper.... you can just use that... u wanna start with 400,then 600,800,1000,1500,2000 than if you really want it like a mirror and to be perfect, use some polishing compound w/ a polishing wheel... bling bling!!!
 

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Quote:


Originally Posted by pbasil1

ya u usaully wanna buy a premade kit cuz it is cheap and works well, but if your like me and have tons of leftover sandpaper.... you can just use that... u wanna start with 400,then 600,800,1000,1500,2000 than if you really want it like a mirror and to be perfect, use some polishing compound w/ a polishing wheel... bling bling!!!

kit shmit!! go to an autobody paint and supply store. I bought five 7x10 sheet of sandpaper of each grit, 400, 800, 1000, 1500, and 2500. Hit it with some metal polish and bam! $4 for that much sandpaper, im working on my gpu coolers now.
 

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ya either way works....but you just need to have a piece of glass to do it on....or super flat surface
 

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Quote:


Originally Posted by xchrisposix

I would like to know if there is a way to restore the "perfect flat" surface of a heatsink(the part that actually comes in contact with the CPU). Like if it had small grooves in it or something, how could I fix that?

Do you have a pic of how bad the groove is?
 

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what was the final grit you used? 2500? or polishing compound? and if compound what kind?
 

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Quote:


Originally Posted by pbasil1

what was the final grit you used? 2500? or polishing compound? and if compound what kind?

Final grit was 2500 yes. I did rub the shine into it with a diamond micron metal buffing compound. Just finished installing the GPU dropped 2c at idle!!
 
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