It appears you have not yet registered with our community. To register please click here...

 
Go Back [M] > Madshrimps > Articles & Howto's
Lapping a P4 IHS: any good? Lapping a P4 IHS: any good?
FAQ Members List Calendar Search Today's Posts Mark Forums Read


Lapping a P4 IHS: any good?
Reply
 
Thread Tools
Old 22nd June 2004, 00:48   #41
Madshrimp
 
jmke's Avatar
 
Join Date: May 2002
Location: 7090/Belgium
Posts: 79,021
jmke has disabled reputation
Default

nice photoshopping
__________________
jmke is offline   Reply With Quote
Old 22nd June 2004, 00:57   #42
Member
 
Join Date: May 2002
Posts: 1,343
TerAngreal Freshly Registered
Default

the originals are high resolution scans of the IHS - shows about every detail you want

and to set the record straight:
picture number 12, bottom right corner, shows the P4 in the same state as it was in the reflection-pic, post 2 on this page
TerAngreal is offline   Reply With Quote
Old 22nd June 2004, 21:53   #43
kristos
 
Posts: n/a
Default

odd, it doesn't look quite as polisched from top view
  Reply With Quote
Old 22nd June 2004, 22:06   #44
Madshrimp
 
jmke's Avatar
 
Join Date: May 2002
Location: 7090/Belgium
Posts: 79,021
jmke has disabled reputation
Default

high resolution scanners reveil even the smallest scratches on most perfect lapped surfaces






people had comments afterwards also about the roughness of the surface, while IRL it's really flat
http://www.madshrimps.be/forums/show...2753#post42753
__________________
jmke is offline   Reply With Quote
Old 22nd June 2004, 22:37   #45
wutske
 
Posts: n/a
Default

I don't need a scanner to see that my SLK947U's base sucks, it realy need to be lapped . And a mirror doesn't mean a good contact.
I have here an old Duron Alu heatsink wich I tried to lap (didn't realy worked ). If u look from the top, it's blurry, scratched and has different colours. At a very sharp angle, it's like a mirror, but it is concave :grum: -> bad CPU contact.
  Reply With Quote
Old 2nd July 2004, 02:44   #46
Madshrimp
 
jmke's Avatar
 
Join Date: May 2002
Location: 7090/Belgium
Posts: 79,021
jmke has disabled reputation
Default

How are those temp readings TerA?

here's something I found @ XS's forum

Quote:
Originally posted by Axle Gear
Recently, I bought a lapping kit from Easy PC Kits to lap at the heels of my heatsinks.

I got the coarse, and premium kits, as well as the polishing gel, all for just $16.25. I've seen premium kits sell for $30+.

The premium kit includes grits of 400, 600, 800, and 1k. And also 40, 25, 20, 15, and 10 micron pads. Also included is a square glass peice, to give you a nice flat surface to work on.
The gel is 10k grit, and resembles watery cocaine. Extra points for that one.
The coarse kit includes 180, 220, 280, 320, and 400 grain. Looking at my heatsinks, I figured i'd need it!

For this test, the victim will be the
DC1206BM-L/610-P-CU Copper Core Dense Textured Microfin
Since I have a few laying around. I've found them to be notoriously poorly lapped, and furthermore have this thermal pad-like goo on them, which is a pain to remove without scratching the heatsink. It will be applied with Arctic Silver Ceramique (which EasyPCKits threw in lovingly extra, along with some zip ties, for no charge!)


Temperature readings will be taken at a stable 70F after the thermal compound has had at least 48 hours of cycling to set in.



The heatsinks are notoriously badly lapped. You can make an audible scrubbing noise by running your finger over them, and the mill lines look to be about hair-width. In other words:
It looks like they cut it out with a fork.


I'll take readings of idle and high loads before, and after the lapping, and keep y'all updated on the results.
If the results show well, i'll repeat with a copper-core TR2-M2, which is a much better heatsink, but also a victim of not-so-great lapping.

follow up @ http://www.xtremesystems.org/forums/...threadid=38064
__________________
jmke is offline   Reply With Quote
Old 2nd July 2004, 04:31   #47
Member
 
Sidney's Avatar
 
Join Date: Mar 2004
Posts: 15,738
Sidney Freshly Registered
Default

I lapped every heatsink I use after testing was done.

Another point from industry experience in metal and paraffin wax; any transformation from liquid to solid will creates craddle during cooling process which can be left at ambient temp to cool or accelerate cooling process by blowing air across; or going thru refrigerated tunnel. Whichever method you take the surface of the metal would become convex. This could be corrected today using highly accurate temp control measurement to melt metal to just a few degrees above it's melting point. Cutting generates heat also; unless expansive equipment is used. (I don't believe the factories in China is using no heat cutting equipment).

The secondary machining to make the surface flat and smooth is very costly. Don't expect to pay $10 to $30 and get a perfectly flat and smooth heatsink. Vibratory finish will get better result; again cost more.

Lapping your heatsink will almost always yield better result if done correctly.
__________________
lazyman

Opteron 165 (2) @2.85 1.42 vcore AMD Stock HSF + Chill Vent II
Sidney is offline   Reply With Quote
Old 4th October 2004, 23:09   #48
Madshrimp
 
jmke's Avatar
 
Join Date: May 2002
Location: 7090/Belgium
Posts: 79,021
jmke has disabled reputation
Default

Well we are back with some non conclusive results for the lapping kit our friend insulglass send us. TerAngreal lapped his P4 as you can see in the pics above; after a couple of weeks of temp monitoring before/after no real difference was seen.

but as insulglass mentioned, the biggest impact will be on medium/poorly lapped heatsinks; I have the kit now and will do some lapdancing soon with some of heatsinks I have lying around.
__________________
jmke is offline   Reply With Quote
Old 20th November 2004, 23:21   #49
Member
 
jort's Avatar
 
Join Date: Jun 2004
Location: mechelen(belgium)
Posts: 2,037
jort Freshly Registered
Default



my procc has a sweet babyass too now

i used => grid 180,240,400,600,1000

didn't find 1200 or more on a saterday
__________________
watercooling, chilled water,direct phase change, cascade, custom modding
jort is offline   Reply With Quote
Old 21st November 2004, 00:49   #50
kristos
 
Posts: n/a
Default

what did you use to get it so nice and shiny? cuz I've read articles where they go up too 2500 grid (I think, not sure about the number but it was more then 1200 grid) and then they use some pollish and a linnen cloth but never did I see one that had such a mirror finish before.
  Reply With Quote
Reply


Similar Threads
Thread Thread Starter Forum Replies Last Post
A short little guide on Lapping the CPU IHS jmke WebNews 3 1st October 2009 02:32
Tutorial: Lapping your CPU jmke WebNews 2 15th January 2009 16:18
Fancy images prove HSF Lapping Drops CPU Temperature jmke WebNews 0 25th June 2008 16:12
Good design, good overclock, good pipe-The MSI P35 Neo2-FR overview windwithme Hardware Overclocking and Case Modding 2 9th October 2007 06:29
Good Work Systems Fragpedal Elite jmke WebNews 0 28th May 2007 23:28
IHS Temps - P4 CPU Simulator Sidney WebNews 1 28th January 2006 21:15
This memory any good...? eskellie8 General Madness - System Building Advice 31 12th December 2004 23:36
What is a good, reliable, Power Supply? jmke WebNews 0 24th October 2004 19:46
n00b lookin for a good kit rahvin708 Hardware Overclocking and Case Modding 4 17th July 2004 23:05
Lapping a P4 IHS: any good? jmke WebNews 0 13th May 2004 00:28

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


All times are GMT +1. The time now is 08:42.


Powered by vBulletin® - Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO