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Before I lap it..

post #1 of 53
Thread Starter 
My old Hyper 212+(push and pull) with the same thermal compound gave me 33~34C idle with the same ambients on my 955 @ 3.3GHz , gave my bro 24C (***) on his 945 @ 3.7GHz idle (his in not a BE so idles at 1GHz, while mine does 800MHz with CnQ on...)

Still a 10 DEGREE DIFFERENCE IS ASTOUNDING ...
I did the mounting both times.. It's the same cooler .. I just gave it to him..

Now I've bough myself a V6GT with a mirror finish base!!
Leads me to believe that I have a seriously uneven processor..
SO I'll be lapping it before I set up my V6GT ..

1.What pattern should I be lapping the processor in ?? Something tells me that only straight lines and rotation by 90 degress will make things round

2.Polishing agents after 1800Grit not recommended??

3. A fully polished surface = no gripping surface for the thermal grease ?? I use a slightly viscous grease so should it even be a problem >?

From what I gather .. thermal grease fills up air pockets..
Air pockets are reduced when the surfaces are lapped.
Mirror finishing = maximum metal contact... so less grease required .. isn't this ideal ??

Thanks folks!

EDIT ::

UPDATE!!

DONE !!!
OC : 3.5GHz @ 1.375Vcore ( thats just for the sake of it )

New idle temps: 32C
Load temps : 49C

WOhOOo
Whats sad is that my BRO's hyper 212+ gives him 45C at the same OC :/
well well.. maybe his sensor's off..
Lapped and all ... pics attached!!

These are with my phone :/ My camers was out of juice .. thus it's in the pic.




What I've learned --

IF you have crappy sandpaper , don't fear .. press darned hard. The pins can take it .. your hand probably wont ( I have burn marks on the side of my hand )

No pattern -- figure of 8 and all required till you hit 600/800 grit..
400 grit ?? Better off doing whatever levels the surface , in any pattern, with force, in any direction!

There is no need to take off all the nickel -- If it's flat , its flat

It was worth it .. 4GHz , here I come

The V6GT is a good cooler, but is stupid stupid stupid to install.. make sure the CPU IS IN BEFORE you get to mounting the assembly and all..

Polishing the IHS would have been sweet ( using some agent..). But thats what fools do . /thread.


Edited by 0razor1 - 7/25/11 at 12:18pm
post #2 of 53

Well

I've lapped mine, I followed this pretty much


and no, you use the same amount of thermal paste, the thermal paste is the transfer material. If it's quite viscous like my stuff (IC diamond) then use a small peice of stiff plastic to spread it over the surface of the CPU.

Comps
post #3 of 53
Thread Starter 
Figure of 8 then ??


Thanks for the link Just wondering with the quad cores and all it shldn't make any difference at all ?? Right ??
post #4 of 53
Won't make any difference at all, it's the same for all processors.

Comps
post #5 of 53
So what happens if you lap this thing into 0.1mm thickness?
    
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post #6 of 53
Quote:
Originally Posted by 0razor1 View Post
Figure of 8 then ??


Thanks for the link Just wondering with the quad cores and all it shldn't make any difference at all ?? Right ??
Definitely figure 8. The same process is used in high precision metal working. Using any movement other than a figure 8 is much more likely to take off more material in a localized area instead of an even amount over the entire surface.

If you just went back and forth you'd likely end up with an angled surface instead of a planar surface.
post #7 of 53
Quote:
Originally Posted by jeffdamann View Post
So what happens if you lap this thing into 0.1mm thickness?
It'd be very hard to do, but once you get a mirror finish that's all you really need.

The top of the processor is convex so when you push the stock heatsink onto it, it basically pushes the metal cover down. When you lap it, you remove the convex and you give it 100% contact.
post #8 of 53
is that sandpaper??? omg wth lol
    
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post #9 of 53
Yep, sandpaper, start off at around 600 grit and move up to 2400 grit.

Worked a treat on mine

C
post #10 of 53
does that ruin the cpu? i dont understand what lapping does lol
    
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