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Metal to Metal !!!

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cozmo_d

Member
Joined
Dec 21, 2000
Location
Planet X
Well I never realy thought about this but metal to metal is better than using compounds to mount heatsinks, since any compound in some way acts as an insulator

with that in mind I wonder if I laped my globalwin HS & my chip

untill they were a mirrored finish & remounted them with NO paste of anykind if this would prove effective.

1. HAS ANYONE DONE THIS? BEFORE I WASTE MY TIME.

a. WOULD THE CHIP MELT DOWN ?

b. WOULD THE TEMP GO DOWN ?

c. WOULD THE TEMP GO UP ?

d. DONT DO IT, YOUR OUT OF YOUR MIND !!!

e. GO FOR IT

f. WHY DOSENT THE MFG SHIP THESE PARTS WITH A FLAT & SMOOTH SURFACE I KNOW IT CAN BE DONE I WORK IN A MACHINE SHOP
 

lazerin

Member
Joined
Jul 13, 2002
Location
Australia
HIGHLY NOT RECOMMENDED. No matter how smooth you think you have lapped it, there are still microscopic bumps and rdiges on the surface which WILL trap air in there when pressed up against the chip. These air bubbles will heat up to a very high temperature and severly disrupt heat transfer from the chip onto the heatsink thereby causing a significant temp increase.

So if you care about your chip.....for heaven's sake, put some thermal compound on it! :D :D
 

Stedeman

The Half Asleep Member
Joined
Aug 29, 2002
Location
Lewiston Maine
Yes/No…Think about ringing a set of gauge blocks together // if you could ring a heat sink to the CPU like you can with gauge blocks it would work but if not you would still have air between them and then (to some point) AS3 paste would work better
PS the razor trick helps get the paste as uniform as possible for the best contact
 
OP
cozmo_d

cozmo_d

Member
Joined
Dec 21, 2000
Location
Planet X
Okdokie

gona re-apply & smooth with R-blade

to bad about thoes microscopic airpockets

I did not consider them in the equation
 

Lt. Max

Member
Joined
Jan 28, 2002
Location
Seattle, but im Estonian
well if its super mirror flat then put verrrry lil as 3 cause u dont neeed a lot for the microscopic holes, the extra as3 actually will slide over the edge of the cpu i think.
 

Toysrme

Member
Joined
Nov 12, 2001
Don' t do it. I ahd the same thought this time last year. My temps went down tho! Alias onnly because I had used WAY to much ASII. At the time I was putting it on too thick and it was insulating.
-Toys
 
OP
cozmo_d

cozmo_d

Member
Joined
Dec 21, 2000
Location
Planet X
yep

from everything ive read only a superthin layer of paste is needed

I use a plastic bag to cover my finger as well while applying thermal paste

because the oils of your finger can cause problems with heat transfer from the die to the hs

realy I was very poised to do the polishing/laping metal on metal

but as someone above pointed out there would still be microscopic airpockets that would trap hotair & thus be a problem
 

hellrazrblade

Member
Joined
May 29, 2002
Location
H town or Tulsa
it wont work unless you've got them shiny enough to cold weld them... which takes two mirror finished surfaces and pretty much seemlessly joins them.
 

jlin453

Member
Joined
Sep 18, 2002
Location
Austin, Texas
I had a volcano 7+ on my XP2000+ with no compound for about a week. On the lowest speed setting, I was at 44C idle. Now that I have the artic silver 3 on there, temps dropped about 6 degrees.

And I only left it bare b/c the AS3 was in the mail :p :D



btw, My case temp is/was 30C, which might've helped.
 

Stedeman

The Half Asleep Member
Joined
Aug 29, 2002
Location
Lewiston Maine
A mirror finished surface doesn’t mean that the surface is flat, just that the finish is high (think fun house mirror). The point of all the pastes is only to fill the voids in the face of the CPU and the heat sink only
 

hellrazrblade

Member
Joined
May 29, 2002
Location
H town or Tulsa
Stedeman said:
A mirror finished surface doesn’t mean that the surface is flat, just that the finish is high (think fun house mirror). The point of all the pastes is only to fill the voids in the face of the CPU and the heat sink only

well aware of it, but if you get a mirror finish while using a flat surface (glass) to lap on, you get a smooth flat surface which would be the whole point of lapping. and note i said mirror finish which to me means flat because most mirrors we see are flat (i know, parabolic mirrors, blah blah..)