Temperature issue with Phenom 965 BE 125w and M3A78-EM

H

hsingh00

New Member
Ok..I have some weird thing going on that I hope somebody can explain to mean. So I'm built a HTPC using a Antec Black M FusionRemote 350 case. It a pretty small case and I'm running the Phenom 965 BE in it so when its at 100% usage it its quite warm in there. If you take a look at the first picture that I uploaded at imageshack, you'll see that there are 2 exhaust fans to the right of the CPU. On the bottom left there is one intake fan. With this setup, my idle temps are about 28-30°C and with Prime95 running I get to about 60-62°C. AMD's website says 62°C is the hottest it should get so that scared that me a bit so I started researching on the Stock Cooler that comes with it AND the CPU cooler sounds like a jet engine at 6,300 RPM!! Its actually a pretty good cooler for this CPU so I didn't understand why it was getting so hot. So I thought maybe the airflow inside the case. Physics dictates that cool air should be forced inside the case which causes a high pressure area and "pushes" the hot air outside the case through the vents and the help of a exhaust fan. So I rotated the 2 fans to the right of the CPU and now I have 3 intake fans. I also MacGyvered a 4th fan (2nd picture) to be a exhaust. I now idle at like 25-28°C and 58-62°C while running Prime95 still!! BUT my CPU Cooler was at 3,300 RPM...so at this point I'm WTFing. Enter Q-Fan and AMD Cool 'n' Quiet. AMD Cool 'n' Quiet just affected my idle temps so that cool. Disabling Q-Fan on the other hand runs my CPU Cooler at 3,300 RPM and keeps it there. There therein lies my question. Why doesn't the CPU sound like a jet engine and why isn't it going at 6,300+ RPM when Q-Fan is Disabled? The way my set up is now, the temps shouldn't even approach 60°C so I don't get it. So then I popped the top off and stuck a piece of cardboard between the 2 fans and CPU...the CPU Cooler all the sudden started to speed up! I stopped at 4,300 RPM...so it can go faster...why doesn't it after I disabled Q-Fan.

http://yfrog.com/b6img0140rjx

Thanks....sorry for the long explanation :-)
 
Prime 95 pushes your CPU to it's max limits - and it's something you'll probably never do in your use. I got my core i7 920 to 80 degrees with the OEM fan on Prime 95.

I wouldn't worry about the temps you're reporting at 62 - if you want to overclock you can upgrade to an aftermarket cooler that'll cool better than the stock fan that came with your CPU.

My Cooler master V8 Directs the air to the back fan - rather than spinning it around inside the case.
 
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