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difference in base of p4 heatsinks

Racer7201

Senior member
Lets see if I can explain this. I have a retail h/s fan on my P4 and decided to put a better unit on it. Removed the old one, installed new one, fired it up, shut down. Found the h/s assembly moving around and when i removed it the contact pattern was only half imprinted. Reinstalled retail and returned the other h/s. I then ordered one on line and it just came in and its the same way. I got to looking and the retail h/s is notched on each side and the others aren't, so it doesn't sit all the way down on the cpu. The base corners of the h/s are resting on the adapter on the m/b that it latches to. I find this odd, because I put the same kind on h/s fan on my other system with no problems. Hopefully i explained it well enough. What are some good options? The m/b is a Asus P4S533. The other m/b is a P4B266 that works ok. Maybe its time for the grinder!! Or use the holes and bolt a h/s on.
JF
Also, is the adapter on the m/b suppose move around slightly with no heatsink attached. I don't feel like tearing the P4B266 apart to find out.

P4S533
1.8a @ 2.5
256m Mushkin pc3200
Matrox G400
Maxtor 80g ata133
 
can you supply some pictures?
if it is a real intel p4 478 hsf...it should fit right in without any uncontact spots...
my volcano 7+ has a part of it slightly higher than the contacting surface with the CPU...but the entire CPU's heatspreader gets contact...
btw...your hsf should not be move around at all...it should be pretty tight in the socket clams...
 
My POS thermaltake volcano cpu had uneven contact pattern as well...My original base retail hsf and AVC hsf fit well...I got and Alpha which requires removal of the universal mounting device and bolts to the board and has tension springs to insure good contact and it had a perfect contact pattern...

My advice get the Alpha 8942 and get an 80mm panaflo or ystech fan...
 
I just took some pictures, so i'll download them and put them on my website when done. I really don't like the idea of the Alpha, since removing the m/b to install is a pia. But then again, i probably wouldn't be messing with this P4 like i do the AMD system.
JF
Ok, I uploaded a picture to my web page.
Picture of heatsinks

LMK if it doesn't work, because I've been having problems with it updating the pages.
 
If that heatsink to the right on the top picture is the one you are trying to use I have to ask why. The stock heatsink looks better.
 
It may not look like it, but the heatsink is larger than the retail, plus it had a higher output fan. Because the fan assembly is still on the retail it appears bigger.
JF
 
The key with ocing a p4 is:

1) copper embedded core...alpha has one of the largest contact areas of heatsinks I have seen...

2)80mm high cfm fans...alpha takes 80mm fans...most orther heatsinks only take 70mm fans which to get 45-50cfm like I am running will be xtreme rpm and noise!!! My 80mm 48cfm fan makes less noise then my avc hsf with 70mm fan yet cools it much better.
 
if you want to go one step further w/ the alpha:
hone the copper to a true mirror finish.a small amt. of Thermal compound will now act like a drop of water between two peices of glass.I can pick up my mobo w/ just the alpha heat sink. if you do this BE CARFUL WHEN REMOVING THE ALPHA. it will pull the cpu right out of the socket(done it a few times).
you must gently rock it off.
 
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