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Guide for lapping the actuall processor IHS?
- Thread starter treepop
- Start date
- Joined
- Jun 16, 2003
- Location
- Cranberry Twp. PA
It's the same thing.
OP
- Joined
- Mar 4, 2003
- Thread Starter
- #3
pwnt by pat said:
cool...hehe I went ahead and did it like I have with my old heatsink....a lot less water obviously.....I got it down to the copper core.....I used only 400grit paper....I had to go to my girlfriends house for dinner and will follow up with 600grit.....I doubt it will make a huge difference...but thus far I have gone from 53-54 idle in bios.....to 47-48 idle in bios.......lapped the ihs extensivly while the heatsink not so much....and changed from ceramique to arctic silver 5
- Joined
- May 29, 2005
- Location
- Etters , PA
I would keep going..
If you are doing the actual IHS (the integrated heat speader on the CPU) then I would keep going with finer grit paper right up to 2000 grit. You may need to go to a good paint store or auto parts place to find it.
I did my 939 pin Winnie because it was cupped-out like a soupbowl. You can have a really well lapped HSF, but if the IHS isn't making good contact you will have heat issues.
If you are doing the actual IHS (the integrated heat speader on the CPU) then I would keep going with finer grit paper right up to 2000 grit. You may need to go to a good paint store or auto parts place to find it.
I did my 939 pin Winnie because it was cupped-out like a soupbowl. You can have a really well lapped HSF, but if the IHS isn't making good contact you will have heat issues.
OP
- Joined
- Mar 4, 2003
- Thread Starter
- #5
Bhugarov said:
Well I wanted to see real quick before I went to my Girlfriends house....whether this was the issue.....and it seems to be somewhat the issue...I mean I have already reduced my temps by 6celcius....so thats promising........do you really think there is a difference in temps from 400grit to 2000grit....I mean there will be much more of a shine........but on a melecular level of contact....I dunno if it will be huge.....but it wont hurt to try.....I am gunna do 800grit as soon as I get home.......
*EDIT*
ps your pic under your name reminds me of Donnie Darko...your freeken me out maaaan
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- Dec 31, 2004
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- Osan AB, South Korea
yes, there is a pretty good difference. 2000 is 5 times finer than 400 grit, so the bottom will be 5 times more flat. Good for another couple of Cs, probably. They say after 1200 or so is where you start to get diminishing returns, but in this hobby, returns are returns, right? 
OP
- Joined
- Mar 4, 2003
- Thread Starter
- #8
skou said:
while flat is the goal....I think that having a smoother surface may be an added benefit....flat is to acheive the cooling systems potential; while smooth is in an effort to exeed it....I am thinking that if you minimize the peeks and valleys of each peice of metal you will achieve maybe more contact between the IHS and heatsink...I plan on heading to 800grit for sure.....and if the temps are not increased at all then probably stopping.....but if I see an increase I will keep going to finer paper, untill I see no increase.
The problem I am running into is my heatsink.....I am going to start a thread about how the heck you sand a freezer 64...this thing is a beast....the top is wide while the base is small causing a teeter tooter effect.....making it raise in the center....and I think probably worsening my temps in the long run. Any thoughts?
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Here is what 2000 grit will do for you..
- Joined
- May 28, 2002
If you look carefully, in the first picture, the reflection of the bottom of the CPU is not a straight line. (either is the left side reflection.) You have a nice polished rounded surface.
I'd rather have a flat dull surface, than a rounded shiny surface.
steve
I'd rather have a flat dull surface, than a rounded shiny surface.
steve
- Joined
- Dec 26, 2004
BioVader said:Here is what 2000 grit will do for you..
Why so concave?
My sink:
.JPG)
not 'flat'? Eat this:
Either way, 400grit is HORRIBLE to finish lapping with. you need at LEAST 600grit, and that's still way too low for my liking.
- Joined
- Feb 26, 2003
hot deum! you guys make me want to do my CPu and heatsink - too bad in about 4 diff stores i have looked in the most they have is 300grit paper! man costa rica sucks sometimes.
- Joined
- Dec 26, 2004
Mr.Guvernment said:
No auto body shops/
btw, just ask Dave from easypckits... he's a nice guy, he'll ship some paper to you
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- Oct 4, 2004
- Location
- Warren, PA
Well I was using mulitple lights so I don't know what to tell you... I know the contact surface where the HS contacts the CPU is flat. I don't care if an edge may be a little round. Makes no difference to me. And the temp drop shows it.
- Joined
- Dec 26, 2004
skou said:
hehe, my bad, i knew the difference. Concave just rolls off the tongue
I see where your logic is coming from (smooth + flat = best), I have the same thing in my head. I mean, once it's flat, wouldn't you want it to be smooth so there are less microscopic valleys and even more contact area?
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- Feb 26, 2003
SolidxSnake said:No auto body shops/
btw, just ask Dave from easypckits... he's a nice guy, he'll ship some paper to you
Might just have to, i have hit 3 paitn store - 2 hardware stores and one multi purpose - all "auto" shops i see around me are crap and have nothing in them
it is scary they are still in buisness - the sad thing about costa rica it seems is they dont sell items that go with the main things they sell
You can go to the Sony store - buy a TV - but they dont have stands - or they dont have AV cables - things like that
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- May 1, 2003
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- Seattle
This is what my FX-55 looked like after lapping.
Start with 400
Ended with 1000 or finer
Start with 400
Ended with 1000 or finer
- Joined
- Dec 31, 2004
- Location
- Osan AB, South Korea
well, if this is going to turn into a thread to show off IHS pics...
Sorry about the quality, all I have is the <1MP still camera on my camcorder
Graph paper. NOTE: The paper is not 100% flat becuase it is slightly wet! If it doesn't look completely straight in the pic, its cause the paper itself isnt! but you get the idea.
I love this pic soooooo much
both are 2000 grit. Full thread with more IHS and HSF pics is here .
as for smooth vs flat...
_/\_/\_/\_/\_/\_/\_/\_/\_/\_/\_/\_/\_/\_/\_ This is "flat" .
--------____________________---------- This is "smooth" (imagine its curved toward the edges) .
____________________________________ This is "smooth and flat".
Which would you have? Depending on the circumstances (grit used, amount of curvature, etc), "smooth" may actually have more contact area than "flat". Don't forget the heat is only comming from the very center of the IHS, so if the edges are curved up slightly its not as big as a deal as if the center isn't smooth.
Sorry about the quality, all I have is the <1MP still camera on my camcorder
Graph paper. NOTE: The paper is not 100% flat becuase it is slightly wet! If it doesn't look completely straight in the pic, its cause the paper itself isnt! but you get the idea.
I love this pic soooooo much
both are 2000 grit. Full thread with more IHS and HSF pics is here .
as for smooth vs flat...
_/\_/\_/\_/\_/\_/\_/\_/\_/\_/\_/\_/\_/\_/\_ This is "flat" .
--------____________________---------- This is "smooth" (imagine its curved toward the edges) .
____________________________________ This is "smooth and flat".
Which would you have? Depending on the circumstances (grit used, amount of curvature, etc), "smooth" may actually have more contact area than "flat". Don't forget the heat is only comming from the very center of the IHS, so if the edges are curved up slightly its not as big as a deal as if the center isn't smooth.
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