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Before I lap it.. - Page 5

post #41 of 53
Quote:
Originally Posted by 0razor1 View Post
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!
I really hate to ask such a basic question, but I see you talking about idle temps. Have you compared your load temps with your brother's load temps?

I could explain, but suffice to say that idle temps are useless. I'm skimmed this whole thread and I have not seen you mention load temps. Did I miss something?
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post #42 of 53
yeah load temps is what matters the most !

Need some info on that before I take the next step in cooling and do this to the CPU and Heatsink aswell, but from the tests on youtube this is promising.
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post #43 of 53
Thread Starter 
LoL , load temps were 54C for me and 45C for him


Well ,
Am lapping now !!
Got 3x400 , 1x600 and 2x1000 Grit wet sandpaper ( silicon carbide) sheets
WISH ME LUCK!!

If I don;t post back in a couple of hours ... :*( you know that things went south ... have an athlon 2 x2 lying around here somewhere though !!

Letting the V6GT's surface be... it's flat .. so what if it isn't a mirror finish!!

Will post back pics of before and after ..
Sorry , will not be able to compare temps ... but can compare temps of my CPU with the OLD HYPER 212+ and NEW V6GT ( and lapped proccy of course)..

Will post back soon xD
post #44 of 53
Quote:
Originally Posted by Phantom_Dave View Post
I doubt you will see any improvement by lapping the cooler base. You may even make it worse. All of the coolers I have ever used were perfectly flat. The mirror finish doesn't mean a great deal. Flatness does. Even my Noctua doesn't have a smooth looking mirror finish and they are the highest rated air coolers available.
To make the most surface area there is no point doing one and not the other.\\

Surface one is the cpu heat spreader which is made Concave so to address this Heatsink makers made the base of coolers Convex to mate the surfaces.

So if you lap the CPU you loose the Concave surface for a flat one and the cooler still has a Convex base, so you effectively reduce the mating area, hence why it's best to do both.
post #45 of 53
Thread Starter 
Done it !!! Refer to the first post >> editing now!!!
post #46 of 53
Good job.
 
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post #47 of 53
Quote:
Originally Posted by smash_mouth01 View Post
To make the most surface area there is no point doing one and not the other.\\

Surface one is the cpu heat spreader which is made Concave so to address this Heatsink makers made the base of coolers Convex to mate the surfaces.

So if you lap the CPU you loose the Concave surface for a flat one and the cooler still has a Convex base, so you effectively reduce the mating area, hence why it's best to do both.
That's a nice theory, but I can assure you that my C14 is perfectly flat. But my heatsink is not.

GJ on the lapping!
post #48 of 53
Thread Starter 
Thanks folks, you've been helpful indeed ,, though I think I've caused quite a stir

Lapping needs to be done by the SKU guys :/ If they're marketing an enthusiast chip ( BE) then they need to level the darn surface to begin with.

Good lord my arm aches.. there was a point where I was watching TV and eating chips with one hand while the other was busy polishing this thing ..

I avoided the ultra slick finish cause from what I've heard , polishing agents = FAIL.
post #49 of 53
Thread Starter 
Thanks crashdummy Oh btw lol sig
post #50 of 53
Well smashmouth01 is correct: which is why Prolimatech stated loud and clear that the Mega should NOT be lapped. The base is made to mate with the not-flat surface of the cpu's ihs (or whatever it's called).

But, lapping can remove the extra material between the cpu and the base of the cooler lowering the temps anyway.

Either way. His temps went down a few degrees and he's going to crank the juice--that's all that matters.

Trial and error...it's how alot of us learn here.
 
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