Hot Q9550 - Zalman 9700NT

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Joined
21 Jun 2009
Posts
1,668
Location
Chester/Loughborough
My old system -
Q6600 (stock) energy efficient 95W SLACR version
4x1GB DDR2 COrsair Dominator
MSI P7N SLI Platinum
CM-690

DSC00966.jpg

DSC00968.jpg


(with very little in the way of cable management)

used to idle around 17/18C (and drop as low as 11C when i had my windows open) and 32C full load IBT.

The motherboard then got fried (thanks to an inconsiderate neighbour who didnt understand kettles+heaters were banned because of the low Ampage of our rooms and continued to short out our power) and I removed + reinstalled the heatsink about 3 times:
off+on to test CPU in friends PC
off+on for first RMA
off+on for second RMA (bent socket pins).

I then noticed the temps had raised to 25C idle and did an IBT test getting 40C (still acceptable as far as I was concerned) but out of curiosity I uninstalled, cleaned and reinstalled the cooler but temps didnt really change noticeably (I did also completely clean out my case and filters).

I then upgraded my system to -

Q9550 yorkfield
EVGA 750i F T W SLI (why do they censor F T W ?)
Silverstone RV01B-W

which included uninstalling and reinstalling the cooler.
I also took some time on the cable management and thought it looked pretty decent.

DSC01493.jpg

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I have since noticed a rather large temp increase to (idle) -
#0 42
#1 35
#2 42
#3 42

So ran a Prime95 heat torture test and peaked at -
#0 85
#1 77
#2 81
#3 80

At first I put it down to the new CPU being hotter, the summer heatwave, the new case not being as cool as the CM-690 . . .
But im starting to think maybe in all the removing + reinstalling the Zalman the cross strut thats used to press the contact plate against the CPU has been bent out so the contact isnt as good as it was, and maybe the thermal compound (used the stock zalman stuff all the way through so probly 9 months old now) has began to decay or something . . .

Any ideas ?

Im thinking of
trying the stock cooler to see what temps I hit there.
buying some arctic silver 5.
finding a new/spare cross strut.
buying a Prolimatech Megahalems.

cheers :D

(all temperatures taken using CoreTemp)
 
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Anyone got any thoughts ?
Im going to take it to pieces and try the stock fan out now, anything I should be looking out for ?

EDIT: Ive got a stable room temp of 27C, currently idling at -
#0 44
#1 37
#2 43
#3 43

Left case side off for 10 minutes, temps dropped to -
#0 40
#1 33
#2 40
#3 40

A little extra case cooling might help, but not that much . . . and i dont see how I could do it in my case anyway.
 
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Its E0.

Heres a comparison of the zalman next to the stock Q9550 cooler and a stock Q6600 cooler.
Comparison.png


The Q9550's is tiny, thats what got me thinking 85C is waaay to high for my Zalman at stock.

Anyone got a similar 775 mount they could compare to this ?
DSC01510.jpg


not sute if it is losing its bend or not.

After I took the cooler off i noticed something was amiss; I had forgotten I tried the rice-blob and razer blade method of installation. When I saw the compound on the CPU I remembered I was trying it differently - oops.

Pasteb4.png


And heres the contact marks on the heatsink
DSC01513.jpg


definitely not enough compound on there, im lucky the temps stayed as low as they did. Cant believe I didnt check the contact when I did the build - caught up in the excitment i guess lol.

Reinstalled and checked the contact -
DSC01514.jpg


Temps are now down to -
Idle
#0 36
#1 29
#2 37
#3 37

Full load
#0 53
#1 45
#2 51
#3 51

Much nicer =]
Thats my lesson learned lol

Anyone got any ideas why #1 is always lower than other cores ?
Or why #2 + #3 are always the same ?

Cheers.
 
I've a 9550 and my temps are idle at 45-50 - usually cores 1 and 3 are hottest with 1 being the hottest out of all the 4 cores. I've got that **** stock cooler though that you have in one of your pics :(

investing into new gear next month though :)
 
I hadnt when I wrote this thread, I was getting the temps sorted out first. Ive now messed about with overclocking a little bit and its going 3.2GHz stable without any voltage changes, I dont feel the need to go any further just yet.
 
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