Does your 920D have a complete flat IHS ?

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04-29-2006, 04:45 PM
JimboJoe43

Quote:

Originally Posted by wa77ss

Sent, is that a XP-90c ? I have one and am getting a 930D soon, but I didnt know they worked with LGA775. I guess they do ?

LGA 775 mounting kit for the XP-90: $4.99

http://www.jab-tech.com/Thermalright...t-pr-2570.html

Getting one myself..

(no I don't work for that company)
04-30-2006, 01:15 PM
gone_fishin

I'm thinking of a quick and dirty way to fix mine.

I think I will put the chip under an endmill on and shave the edges of the IHS right off. 1mm depth is all that is needed then the complete center will make contact.
04-30-2006, 02:10 PM
Sneaky

Quote:

Originally Posted by gone_fishin

I'm thinking of a quick and dirty way to fix mine.

I think I will put the chip under an endmill on and shave the edges of the IHS right off. 1mm depth is all that is needed then the complete center will make contact.

it would be much easier, and especially safer to just lap your IHS by hand... not to mention that this will give you a surefire flat surface and make it smoother at the same time - this will get you the best temps possible

just my .02 on the matter
-JR
04-30-2006, 02:34 PM
gone_fishin

OK I lapped it. It was fast and easy enough. Started out with 150grit went up to 1000. Took the edges off quickly then the higher grits smoothed it all out. 50% of the neckel plating was even left in the center.

I used Acrtic Silver5 and the initial temps after putting back together are 3C idle better and 5C load better. It may improve as the pea sized nugget of goop spreads out better over time with the heat and presure.
04-30-2006, 06:14 PM
Sneaky

pea sized? it should be about half that size...

you should lap it all the way down until the entire processor is bare copper if you truly want to take advantage of lapping your IHS
04-30-2006, 07:24 PM
gone_fishin

Quote:

Originally Posted by Sneaky

pea sized? it should be about half that size...

you should lap it all the way down until the entire processor is bare copper if you truly want to take advantage of lapping your IHS

figure of speach on the pea sized, small round glob.
Flat is all I was looking for and flat I now have. This AS5 is real sticky stuff, can't spread it like the old AS3 so the glob method seems better.

With lapping I went from 50C idle stock vcore at 3.73Ghz to 47C idle. I then directed an 80mm fan up against the northbridge sink and got further down to 42C idle, 56C @ 50% load. Lots of heat there with the northbridge and heat coming off of the backside of the vid card so with the lapping and the extra fan it made a nice improvement. Still using the stock intel HSF.

I am thinking of hooking my waterblock up to it for a while next.

edited aboove load temp to show it was at 50% load.

http://img.photobucket.com/albums/v1...eresttemps.jpg
05-01-2006, 12:02 AM
jVIDIA

gone_fishin, what cpu have you and are you WC ?
05-01-2006, 12:07 AM
gone_fishin

Quote:

Originally Posted by jVIDIA

gone_fishin, what cpu have you and are you WC ?

I have a D920 and it is on stock Intel heatsink fan with Arctic Silver 5. I lapped the IHS flat (it had raised edges and a sagged middle).

Edit:, I must say that my reported load temp above was only at 50% load, full 100% load is 61C. I am using cpu burn-in and forgot to run two instances of it.
05-01-2006, 12:10 AM
Raiden Zero

Quote:

Originally Posted by jVIDIA

Folks,
I've tried 2 diferent 920D cpu's with 3 diferent WC blocks (Cuplex XT, Storm and Apogee) and they all have the same problem : the IHS is not flat in the center !!

This is a problem because the contact between IHS and WC block is not made correctly in the middle of the cpu IHS!

Anyone has/had this problem ?!

same here 2...

i always had problems with my temps... especially while running dual-prime or rosetta.

after is lapped the ihs tempr droped by around 12°C (load).

with my new sonictower+as5+lapped ihs i got around 52°C dualprime (4.5ghz 1.43v)....

raiden
05-05-2006, 08:57 AM
[XC]Atomicpineapple

1 Attachment(s)

Just got an Intel 805, IHS on that was POS too, stock temps were bout 60 degrees full load on high end water (120.3 rad, Aqua Extreme MP-05 Pro LE, DD D5) after a quick lapping job shown below full load temps are now about 45.
05-05-2006, 11:53 AM
Sneaky

*sigh* i don't mean to yell at you, but if you're going to lap your IHS in the first place, atleast do it right - lap it all the way down so that the IHS is 100% bare copper, and 100% flat

example with my old 3.0E prescott:

http://www.ocforums.com/attachment.p...chmentid=39295
http://www.ocforums.com/attachment.p...chmentid=39296
http://www.ocforums.com/attachment.p...chmentid=39297
http://www.ocforums.com/attachment.p...chmentid=42178
05-05-2006, 12:08 PM
Byron

http://img252.echo.cx/img252/4391/msmiley18xh.gif

with what grid paper you finished it off Sneaky?
also, is that a manual job or you used any professional lapping tools?
05-05-2006, 12:19 PM
Sneaky

thats a hand lap job up to 2500 grit then finished off on a sheet of printer paper

i've seen three other people pull off a finish that nice in addition to me: Cathar, nikhsub1, and Joe Camel

takes a hell of alot of practice to get it done that well, and alot of spare time, and a hand that won't cramp up on you for about 3 hours or so

edit: here's the mating finish to the CPU on my XP-120 when i still had it

http://www.ocforums.com/attachment.p...chmentid=40584

edit2: and my Storm G5's baseplate

http://www.ocforums.com/attachment.p...chmentid=45076
05-05-2006, 12:30 PM
[XC]Atomicpineapple

Fair enough Sneaky, its the 1st time I'd attempted anything like it. Hence I was half expecting to break the CPU so I took just enough off to level it out (roughly) cos it was in a terrible state. Will have to try and ge tcloser to your results sometime, altrhough right now I'm happy with a 15-18 degree drop in temps.
05-05-2006, 12:36 PM
Sneaky

with that water setup you have, you can easily drop it to low 40's load by lapping the CPU fully
05-06-2006, 09:43 AM
Joe Camel

Quote:

Originally Posted by Sneaky

thats a hand lap job up to 2500 grit then finished off on a sheet of printer paper

i've seen three other people pull off a finish that nice in addition to me: Cathar, nikhsub1, and Joe Camel

im all embarrassed ... thanks for the :up:

just a few recent lap jobs....(held up to the monitor)

http://img80.imageshack.us/img80/853...04801cu.th.jpg

http://img230.imageshack.us/img230/1...04787nn.th.jpg

some "OLD" stuff:

TR XP-90

http://img54.imageshack.us/img54/619...00880lp.th.jpg

some AMD IHS....

http://img263.imageshack.us/img263/4...02474iq.th.jpg

the first convex HS ive ever run into (TR Big Typhoon)
(Yonah footprint)

http://img83.imageshack.us/img83/194...05067zp.th.jpg
05-06-2006, 02:38 PM
Byron

Quote:

Originally Posted by Sneaky

thats a hand lap job up to 2500 grit then finished off on a sheet of printer paper

sheet of printer paper?... what kind of technique is that ?
just lap it on a sheet of paper you mean?

btw, do you use a few water drops during the lapping procedure on the working area of the paper?

Top jobs both of ya http://img140.imageshack.us/img140/4986/worship2lq.gif
05-06-2006, 04:21 PM
Sneaky

i used a peice of printer paper as the sandpaper to finish the surface with - equivilant to maybe a 10,000 grit paper or so

but i do dry lapping myself (works best with the type of paper that i use)
05-10-2006, 04:46 AM
nicepun

Quote:

Originally Posted by Sneaky

*sigh* i don't mean to yell at you, but if you're going to lap your IHS in the first place, atleast do it right - lap it all the way down so that the IHS is 100% bare copper, and 100% flat

It may not be as good as yours Sneaky but I did try to do my best. In order to verify if the surface was in fact flat, a put a couple of drops of water then placed a glass from a picture frame on top of the processor to see how the water would spread. Just something to think about.

http://img154.imageshack.us/img154/7...ture3587vn.jpg

http://img154.imageshack.us/img154/9...ture3594yl.jpg
05-10-2006, 05:40 AM
viper650

where are you guys finding the high grit sand paper? home depots around me only carry up to 1000 grit, if im lucky.

and my temps on stock 930 ihs are only 38c full load at 4.0ghz?

my brother gets temps of 44c idle and 52c load on big typhoon
05-10-2006, 05:43 AM
Byron

local hardware store stocks 2500grid ones.

the temp difference could be by an uncalibrated and inaccurate temp sensor.
05-10-2006, 01:10 PM
XS Janus

Sneaky, great lap-job dude. I mean just look at the reflection of that grid pattern.:woot:
Good job thinking of the printer paper, I thought I was the only one who was thinking it was a good idea.
Great info on this thread about 9xx series thanks to all:toast:
________
ZX14 VS HAYABUSA
05-10-2006, 04:43 PM
viper650

Quote:

Originally Posted by Byron

local hardware store stocks 2500grid ones.

the temp difference could be by an uncalibrated and inaccurate temp sensor.

i have a DMM with temp probe on it :)
05-10-2006, 04:46 PM
Byron

DMM = what?

if you have a temp probe touching the IHS side then you won't get an accurate cpu die reading.
05-11-2006, 05:03 AM
viper650

Quote:

Originally Posted by Byron

DMM = what?

if you have a temp probe touching the IHS side then you won't get an accurate cpu die reading.

digital multi meter. and its not between the ihs and waterblock :stick:

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