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AMD FX 8350 High temps. Some advice needed

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May 5, 2013 10:11:43 AM

So I just bought and put together a new system.
But I am having some problems with the CPU temps, or at least I think I am.

The setup is an AMD FX 8350 (@Stock speed) with Cooler Master GeminII M4 cooler, and MSI 990FXA-GD80 motherboard. Corsair Graphite 600TM case and 3 120mm Exhaust fans, and 1 240mm intake.

So my idle temp is about 20-23c which is decent, but when I run prime95 Blend test it spikes hard, usually reaching 62c+ in under 2 min. I Have done nothing in the BIOS other then disabling Turbo core. I have tried to set the Vcore to 1.3v manually, but then the pc just freezes as soon as I start Prime95.

Reseated the fan several times, and reapplied thermal compound, at no avail.

Isn't these temps high? What Can I try to lower them?
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May 5, 2013 10:15:08 AM

Is the thermal compound spreader correctly? By that I mean is there not too much of it on the CPU.
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May 5, 2013 10:32:00 AM

Looked up your aftermarket cooler and it looks like it will handle less heat than the stock cooler for that processor. Frankly, the top model FX processors are very hot, especially under full load. Cooler Master's website does not seem to list the wattage your cooler is rated up to, which leads me to believe it's not that much.

My 8150 usually tops out in the 50's with the stock cooler under load and 20's under load with water cooling. It will idle near 10 on air and room temperature on water.

If you're using a low profile cooler because your computer chassis is small or cramped, that will adversely effect performance.

Your temperatures look normal to me.

To fix this, I would use a more effective cooling solution. Even the stock cooler should improve your numbers, if you still have it.
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May 5, 2013 11:19:10 AM

Thanks, wierd that a 80mm stock would beat the 120mm. Have a Thermaltake Big Thypoon from my old rig, think that would work better or should I just go with the stock cooler?

Gonna get the Cooler Master Seidon 240M then, 40% off too at my prefered Online store ^^
If that doesn't lower my temps, I'm giving up.
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May 5, 2013 11:25:55 AM

Well, the stock cooler wasn't that bad on the high end FX line, unless you wanted to overclock or run "full-throttle" all day long. The cooler you have currently installed was designed for space limited applications such as an HTPC case. Also, it looks like it is meant to run fairly quietly, and as such the fan tops out at 1600 RPMs and 58.4 CFM of air:

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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May 5, 2013 11:33:08 AM

Ok, thanks again! I'm gonna refit the stock fan, and return the GeminII M4 and get the Seidon 240M instead. No point in mounting the Big typhoon then since it has almost identical specs as the GeminII
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May 5, 2013 11:44:32 AM

Well, if you notice, the GeminiII has a slim 120 mm fan on it. If you otherwise like the cooler, just changing to a standard 120 would likely improve performance, provided you pick one with better air flow. I would test the stock cooler as a sort of control, before dropping money on another cooler, to verify that's the culprit. I would also put the voltage back to stock in the BIOS. You shouldn't have to worry about those things, provided you're just running the chip stock.
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May 5, 2013 11:46:27 AM

P.S. Don't forget to do a good cleaning an reapplication of thermal interface material when you do the heat sink / fan swap. Following Tom's instructions was a good call. :-)
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May 5, 2013 11:58:50 AM

Good idea trying to swap the fan, got 3x Artic F12 74 CFM / 125.7 m3/h just shelved, ill try that and report back. Always use Isopropol alcohol to remove paste, keep it clean! :) 

btw: Would 2x of the fans stacked on top of each other perform better than 1?
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May 5, 2013 12:41:24 PM

Yes. 2 would move more air, just use your best judgment about vibration if it seems excessive. Most I've shoehorned together were 3 80 mm fans, but they sure worked well. Noise was a bit much and they were nothing to look at.
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May 5, 2013 1:29:29 PM

Can even run the fans at 25%, completely silent and 48c max on prime. Should patent and sell this thing :p 
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May 5, 2013 2:11:21 PM

I have my 8350 clocked at stock speeds and I'm running an antec h2o 920, when I run prime95 small FFTs I'm sitting at 37 degrees.
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May 5, 2013 2:43:12 PM

Got myself a decent air cooler then for sure ^^
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May 5, 2013 5:11:19 PM

I love it! :-) And those are some good numbers now!
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May 5, 2013 7:21:53 PM

bigpinkdragon286 said:
I love it! :-) And those are some good numbers now!


His or mine lol ? :no: 
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May 5, 2013 8:10:22 PM

I was referring to the OP's temperatures, and his home made attachments. I like creative solutions. Although under 40 with 8 cores under load seem decent too. :-)
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