Which PSU should I get to prevent my pc from shutting down because of overheat?

Glith · Aug 11, 2015

Hi there! I'm quite new to these forums but I expect the rules to be more or less the same as other forums and I hope I posted in the correct forum and the title it's good enough.
So getting to the problem, I've got the Cooler Master Thunder 700W PSU and whenever I play any kind of game(Let's say CS GO, BF4 etc...) it just shuts down, and you just have to wait a couple of mins until you can power the PC once again(Which I heard somewhere that this kind of problem is related to the PSU){Also, I checked my GPU and CPU temps and they stay around 60-67ºC while playing}[If it's worth anything, this only happens during summer, when temps are about 38ºC]. So I've checked your PSU Tier list and I can't find mine there, but I've seen some like the Antec HCG 620 and the Seasonig G-550 and I'm not sure if that would be enough for my computer and if it would stop my pc from shutting down.
Thanks in advance.
My specs:
CPU = FX 6350~4.0 Ghz
GPU = HD 7970 3X GHz Edition(The one from Gigabyte, not the XFX one)
RAM = 2x4 GB Hyper X Fury Blue 1600 Mhz
Motherboard = Asus M5A97 LE R2.0
Windows 10(Does this really matter? I had this problems with W7 too)
PS: I don't plan on overclocking nor doing CrossFire.
PS2: Oh an the motherboard temps are more or less the same as the CPU temps.

GhislainG · Aug 11, 2015

Start by checking the thermal margins at full load (running Prime95 Small FFTs) with AMD Overdrive. Make sure they are 10°C or higher; the CPU speed shouldn't drop to 1.4 GHz while Prime95 is running. If the system shuts down only when the ambient temperature reaches 38°C, then investing in an air conditioner would be a solution.

Glith · Aug 11, 2015

So I just downlaod Prime95, run that test you told me about and the CPU speed doesn't drop to 1.4GHz(It stays a 3.9 more or less). I'm not sure what you ment with "Make sure they are 10ºC or higher" but when running that test all the cores get more than 10ºC(From 47 to 62-67).
And yes, the system only shuts down when the ambient temperature it's about 38ºC, whenever it's around 30ºC it's pretty much okay(And to be honest, wouldn't like to have to use the air conditioner just to use it in summer, mostly because the kw/hour in Spain it's quite overpriced, but I guess if that's the only solution I'll have to use it then)

GhislainG · Aug 11, 2015

The thermal margin on all six cores at full load is 47°C or more at a 30°C ambient temperature? May I have some doubts? Could you post a picture?

The issue could be your PSU, but since it provides 660W on the 12V rail, it doesn't work very hard. Did you run Furmark Burn-in test to check your GPU when it's 38°C in your room? It could also cause a system shutdown.

Glith · Aug 11, 2015

Shit sorry, clicked on there when it's not really solved and I don't know how to undo that XD.
All six cores at full load it's 55ºC when the ambient temperature it's 30ºC, so it doesn't change that much.
So, just tested Furmark Burn-in test at the 1080P preset)without antialiasing) and the minimum temperature it's 65º and the maximun 87ºC(Holy...)[And right now, the ambient temperature it's 30ºC].
Also, I don't know if it will be of any help, but I've got an Hyper TX3 Evo cooler on the CPU, and i've got another one in the case(just a normal one, not specific branch)
Edit: Right now, while playing CS GO, the GPU temp it's about 60ºC and the CPU it's about 45ºC
Edit 2: After a full round(About 30 mins ingame) the CPU temp goes up to 65 and the GPU up to 70

GhislainG · Aug 11, 2015

Run Furmark again when it's hot enough to cause a system shutdown.

Glith · Aug 12, 2015

I just run it(36ºC ambient temp, this will have to do, because this entire week we're supossed to have 30ºC at max), and yes indeed it did shutdown. After turning it on, my mobo told me the CPU temp was 83ºC : D, so I let it cool for a while and turned it on again, checked the CPU temp to see it was just 27ºC(And it stayed around 32ºC all the time I spent without playing).
Is it normal that there is almost no air coming out from the PSU(Also the small amount of air that comes out from there it's pretty hot, worse than the ambient temp)? I mean, the fan seems to be working, but it doesn't seems to take out that much air.
Also I checked how much time it required for the CPU to get up to 80ºC while playing, and it's just a matter of 10 mins, although the GPU stays at 72ºC most of the time.

GhislainG · Aug 12, 2015

If it did shut down while running Furmark, then either the GPU or the PSU causes the issue. The PSU is designed to work at 40°C and since it isn't working that hard, the fan doesn't need to spin very fast. The GPU draws 20A at most; therefore your PSU isn't working at more than 50% of its capacity (55A) during the Furmark test. The Cooler Master Thunder 700W obviously is not very high quality, but I'm not yet convinced it's the issue. Could you borrow another PSU (a quality 550W PSU is enough)? It really is up to you, but I'd rather make sure the PSU is not at fault (unless you already had plans to get a high quality PSU).

Glith · Aug 12, 2015

I see, thanks for your answer(as I have learned something new and you're helping me a lot!), I can't borrow a 550W PSU, the only one I can borrow it's a Corsair CX600 from someone I know, so I guess I could try that(Also, would it be ok if I just tested the HD 7970 on his computer? He has an FX 8350 and the same cooler, so his computer it's pretty much the same as mine).
Guess that I could also take my computer to a place that I know and they could really see what the real problem is.

GhislainG · Aug 12, 2015

The Corsair CX600 more than meets the requirements. Does he also have the same GPU or one with the same drivers? If not, then you'll have to install the drivers and run the test at your place. You can take your computer to a shop, but they'll have to test it in a room that's 38°C or more; that certainly might be challenging to find in most countries. I'd refuse to work in such an environment.

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