Hotter i7 920 C0 in a different environment

R

Rossi~

2[H]4U
Joined
Dec 8, 2008
Messages
3,479
I've moved over from an Antec 900 to an NZXT H2 and i've got an Asus GTX580 Matrix Platinum. It looks as though the heat from the Matrix Platinum is causing a bigger increase in case temperatures than i first thought, leading to higher CPU temperatures..

i7 920 C0 19x206 3.92Ghz 1.325v
Coolermaster V6GT

CPU Temps Antec 900 + GTX470
Idle 38-45c Load 82-88c

CPU Temps NZXT H2 + GTX580 Matrix Platinum
Idle 46-52c Load 88-95c

The NZXT has the following fans
1200rpm+ 120mm fan in the rear (exhaust)
900rpm+ 140mm fan in the top (exhaust)
2x1200rpm+ 120mm fans in the front (intake)
1x1200rpm+ 120mm fan in the bottom (intake)

My i7 920 has always been quite hot, just not a very good chip.
What do you guys think, keep it as it is or back off the overclock back to 3.8 or so? Any other ideas?
 
Your best bet is to use the rear fan as an intake and build a duct to the CPU heatsink blocking any hot video card air from entering the airway and put a fan on top as an exhaust pulling the hot air flow out of the top of the case. That will solve this problem for you.
 
I'm not familiar with the V6 is it a step below the V8? I know the V8 wasn't the best choice for an overclocked 920 so maybe a better cpu cooler could help. Something like a Megahalems or AIO water cooler like Corsair and Antec make.
 
first off great case love the h2, but for the heat only way you can help is exhuast out the bottom and front and intake from top and rear. this will blow all the hot air alway from the cpu and let the cpu get air from outside instead of the other way around.

the matrix cools great but the hot air it takes off the gpu is dumped into the case.
 
dioxholster said:
1.325v is a bit high right? can it get lower?
Click to expand...

Nope, that's what's needed for 10 runs of IBT, a step less and it'll fail sometimes.

Harry1969 said:
I'm not familiar with the V6 is it a step below the V8? I know the V8 wasn't the best choice for an overclocked 920 so maybe a better cpu cooler could help. Something like a Megahalems or AIO water cooler like Corsair and Antec make.
Click to expand...

In a lot of review the V6GT is better than the V8. It's a good cooler. It has 2 120mm fans push/pull up to 2100rpm.

gotendbz1 said:
first off great case love the h2, but for the heat only way you can help is exhuast out the bottom and front and intake from top and rear. this will blow all the hot air alway from the cpu and let the cpu get air from outside instead of the other way around.

the matrix cools great but the hot air it takes off the gpu is dumped into the case.
Click to expand...

While this sounds like it may work, it wont exactly be efficient, going against the natural flow of air and all. Especially with the case having a door and the bottom fan wouldn't shift the hot air away from the case.

Overall thanks for your input guys (and girls?) i think i'll re-seat my HSF and alos look into getting a better top exhaust and maybe a PCI bracket exhaust?
 
Why don't you try what I said. You'll have lower temps than ever before.... If you have a top exhaust that is all that is needed for the whole case.

The cooler the air is that is running through the heatsink, the cooler your CPU temps will be.
 
rive22 said:
Why don't you try what I said. You'll have lower temps than ever before.... If you have a top exhaust that is all that is needed for the whole case.

The cooler the air is that is running through the heatsink, the cooler your CPU temps will be.
Click to expand...

I'd have to reverse the fans on the heatsink as well, which is a bit of a pain but i guess i'll give it a try.
 
Ok so here's the deal.

Tried switching the fans around as rive22 suggested, temperatures went up 2-3c

I have an extra fan intake in the top 3 5.25" bays making the whole front of the case 3x120mm intake. Ive replaced the top 140mm with a much better one, running at 1200rpm/1500rpm/2000rpm depending on what setting i flick it to, i keep it on 1500rpm as 2000rpm is way too loud.
All in all this has helped the temperatures by about 3-5c roughly and on idle it's back to normal almost, hanging around the low 40s

Installed my old heatsink (Akasa Nero with 2x1900rpm 120mm slipstream fans), temperatures went up, had to quite Prime96 as they went past 95c after a little while..

Re-seated the CM V6GT (twice) this dropped the temperatures by a few degrees off of the original temperatures maybe but just because this is the first time i've reseated it in over a year..
I used blob (rice grain) method for the thermal paste the first time and currently running on the line method. There has been pretty much no difference in temperature between the two.

Ran Prime95 and temperatures where between 84c and 90c still.. which is quite high taking into consideration the HSF, voltage at 1.325v and being under 4Ghz.
I'm beginning to think that actually, i know my 920 C0 was hot to begin with but this case change has really shown how rubbish it is.

I don't really want to back off the overclock that much but it looks as though i might have too :(
 
You gotta put a duct from the intake to the heatsink otherwise there is still hot video card air entering the airway.

Even cutting out pieces of cardboard (completely wrapped in electrical tape for safety) can get the job done until getting better ducting. :)
 
Screw everything that's been said so far.

I have found the problem!
Basically the heatsink isn't sitting properly on the processor. This is how i know:

1. Re-seated the V6GT again, and noticed that the thermal paste hadn't spread across the processor IHS as much as i would have thought.
2. The V6GT can move easily once installed. You can grab the top and twist it easily with your weaker hand only.
3. The extra fan in the front and the better exhaust fan barely helped the temperatures
4. Taking the side of the case dropped the load temperatures by only 1c in prime 95.
5. Despite having a 9600GT and an overclocked Asus GTX580 Matrix Platinum pumping warm air into the case, it's rather cool in there still and the graphics cards are idling very low indeed.
6. The V6GT is barely warm to touch under load when running IBT with temperatures upto 90-92c..

What do you think?
Should i get on to Coolermaster about this and see if they can supply me with the V8 mounting bracket? Which is much better and should fit.
Or shall i look into getting something like the Corsair H60? Or just something better with a proper mount, preferably bolt through.
 
the H60 isnt gonna give you better temps i think. I have the same CPU/batch as you but since i havent overclocked i cant compare. what temps did you get without OCing? Im using antec cooler and it maxes on 65c but again no OC. if i were you Id try to get that mounting bracket if thats really the problem.
 
dioxholster said:
the H60 isnt gonna give you better temps i think. I have the same CPU/batch as you but since i havent overclocked i cant compare. what temps did you get without OCing? Im using antec cooler and it maxes on 65c but again no OC. if i were you Id try to get that mounting bracket if thats really the problem.
Click to expand...

Didn't try sticking it back to stock, i didn't bother since i found the problem with the heatsink. I emailed Cooler Master this morning and i am amazed by their response, top support from them! I'll see how that changes things before moving to a different HSF.

Dear Mr./Ms,

Thank you for your inquiry.
We will make a exception for you and send you the LGA 1366 brackets.

Can you give us your address?

Best regards,

M***** B**
Cooler Master Service Department

PSU calculator - http://www.coolermaster.outervision.com/advance.jsp
Product registration - http://erma.coolermaster.com/member/
CM Parts Shop - www.coolermaster.nl/shop


ALWAYS INCLUDE THE ORIGINAL MESSAGE!



--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
This email message is for the sole use of the intended recipient(s) and may contain confidential information.
Any unauthorized review, use, disclosure or distribution is prohibited.
If you are not the intended recipient, please contact the sender by reply email and destroy all copies of original message.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

From: Ross W***** [mailto:Ross.W*****@*******.com]
Sent: vrijdag 9 september 2011 9:42
To: [email protected]
Subject: V8 LGA1366 mount

Good morning,
I was wondering if I could get the LGA 1366 mount/retention bracket for the Cooler Master V8. I currently have a Cooler Master V6GT but it’s very loose with the standard LGA 1366 mount/retention bar, I can twist it and my temperatures are very high because the contact with the CPU IHS isn’t very strong.

This is how I know:

1. Re-seated the V6GT again and again, and noticed that the thermal paste hadn't spread across the processor IHS as much as i would have thought.
2. The V6GT can move easily once installed. You can grab the top and twist it easily with your weaker hand only.
3. The extra fan in the front of my case and the better exhaust fan barely helped the temperatures
4. Taking the side of the case dropped the load temperatures by only 1c in prime 95.
5. Despite having a 9600GT and an overclocked Asus GTX580 Matrix Platinum pumping warm air into the case, it's rather cool in there still and the graphics cards are idling very low indeed.
6. The V6GT is barely warm to touch under load when running IBT with temperatures upto 90-92c..

After reading about a couple of people having this problem they have resolved it by using the Cooler Master V8 mounts that screw into the bottom of the heatsink, they fit the V6GT perfectly fine.

If there is any way you can send just the V8 LGA1366 mounting kit that’d be great, or point me in the right direction to purchase one.

Much appreciated.

Ross
Click to expand...
 
You must log in or register to reply here.
Back
Top