I can't stop my new FX8350 Black edition CPU reaching 70 oC on load. I'm out of ideas. please help.

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scott1000

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Nov 9, 2013
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10,510
Hi

I've just purchased an FX8350 and I've read that it's not safe to go above 70 oC so I'm alarmed that mine is reaching that temperature gradually after heavy load despite using a Corsair H60 liquid cooler. What's most frustrating is that games with my 970 GPU are running really smooth and I would like to overclock, but even on stock settings the thermal margins gradually are reduced to 0 and the CPU alarm kicks in briefly to alert me that it has reached that temp. Yes I push it with heavily modded games and CPU intensive ones like Total War but I still don't know why it's getting that hot, especially when it is idling at about 10-20 degrees? The good news is it seems to cool once it reaches 70 but I fear this may affect performance if the CPU throttles? I've just tried new good quality thermal paste. It seemed to work at first but after an hour the temperatures again reached the limit. I even cleaner out the fan and tried reseating the cooler several times, to no avail.

Any suggestions? With a liquid cooler already in place I don't really know what is causing the problem or where else to turn?

Thank you
 
Solution
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So right now you've got the fan that's there pulling air out of the case, sitting behind your radiator mounted to the back of the case right? So what you would want to do, take a long screw out of say the top left corner and bottom right corner where the current fan is mounted. 2 screws I would think should be able to hold it. Take your spare fan, use the 2 screws, and use those to bolt the fan into the corners you took them out of, but this time your new fan is mounted inside and is pushing air into the radiator, while the fan that came with it is pulling air out of the radiator and out the back of your case. Don't know how much if any the temps will drop but worth a shot...
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scott1000

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Nov 9, 2013
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For the most part it tends to run at about 52 to 62 in games (about 10 to 20 in idle) but on heavy loads it can reach 70 then cool down a bit when the action is most intense. The fan is running at just over 2000 rpm under load which is the max speed. I have not seen any performance hits so far, so this heat problem still remains a mystery to me. Mind you I can't remember many times in the past I haven't had overheating problems with my CPU.

I was wondering if there could be a problem with the setup. I have the fan attached to the heatsink (radiator) on the back of my case. The fan is connected to the CPU fan connector on the mb, and the liquid pump covering the CPU is connected to the only connector I can find that fits, the system fan connector on the mb. I was wondering if this should be connected directly to the PSU in some way instead?
 
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scott1000

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Nov 9, 2013
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You're right, although I don't think 70 will kill it (I've read some posts where people say it is ok, however 70 is reaching the max thermal margin so I'm not happy or I wouldn't have posted, so I think I will upgrade to a better liquid cooler, especially as at the moment overclocking is out of the question. Thanks for your help.
 
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scott1000

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Nov 9, 2013
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I have not seen those options in BIOS? Any suggestions? The fan does reach max speed under load.

Like I said earlier, it's really strange because the temp of the CPU is fine for a length of time and then it just randomly hits 70. At the moment I keep alt-tabbing to check the temp in games. I play Attila Total War a lot, I have no problem in the campaign map, remains in the 50s, but when it goes into battle it climbs and climbs, sometimes reaching 70.
 
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scott1000

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Nov 9, 2013
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I'm not sure what all this means, but I noticed in the BIOS that my fan was set on auto, so I changed it to PWM mode, and then changed my Slope PWM {I guess this allows the mb to control the fan speed} from default 0.75 to max 2.75 (maybe a little high I don't know??) and I am hoping this will let my fan run faster. At least that's what I'm assuming it does? lol Anyway I'll go away and see if this helps. Please let me know ASAP if I'm doing something wrong please?
 
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ohiou_grad_2006

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Dec 3, 2011
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You probably have a different board than I do, but on my board, I can basically tell my board to not control cpu fan speed at all which makes the fan run full speed all the time, that's how I keep mine set.

On the h60 as well, you might be able to mod it. I think on the h60 there are 4 screws that hold the back fan on, and hold the radiator as well. You could potentially try grabbing a 120 mm case fan if you have one spare, take 2 screws out from opposite corners on the radiator, and use them to mount a fan pushing into the radiator, keep the one on the back pulling out, so basically have a push pull config, maybe that would drop thing a little? Worth a shot anyhow.
 
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ohiou_grad_2006

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Dec 3, 2011
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So right now you've got the fan that's there pulling air out of the case, sitting behind your radiator mounted to the back of the case right? So what you would want to do, take a long screw out of say the top left corner and bottom right corner where the current fan is mounted. 2 screws I would think should be able to hold it. Take your spare fan, use the 2 screws, and use those to bolt the fan into the corners you took them out of, but this time your new fan is mounted inside and is pushing air into the radiator, while the fan that came with it is pulling air out of the radiator and out the back of your case. Don't know how much if any the temps will drop but worth a shot

http://www.tomshardware.com/answers/id-1749900/h60-push-pull-fans.html

 
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scott1000

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Nov 9, 2013
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What a complete prat I am. I had the radiator fan the wrong way round all the time! LOL it must have been sucking air into the computer rather than the other way round? Anyway I attached the second fan as well (sucking air into the radiator like you suggested) and have been getting temperatures mainly in the high 30s and 40s and occasionally hitting 50. I haven't tested it for a long period yet, but it's quite clear things have improved. An added bonus in that it's much quieter too :-}

Thanks for all your help. I can think about overclocking now. Once I'm certain everything works fine I'll declare my problem fixed.

I think I should have studied physics more at school? lol
 
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scott1000

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Nov 9, 2013
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Yes will do. I've read that stress testing does actually push the heat up more than normal. Is this true? Or should it still get nowhere near 70? I don't normally do a major overclock anyway (way too complicated, all those voltages and things? Gives me a headache trying to understand}. I normally just increase the multiplier by 1 or 2. Up from current 20 to say 21 or 22. Gives me half a gig or so extra.
 
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