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Old 16th Dec 2012, 09:59   #1
HuckleberryWill
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Safe temperatures for AMD FX 8350

I just ran Prime95 and I was getting around 59*C , I am using the stock cooler.



What are safe temperatures for an AMD FX 8350 to run at? I have no idea if 59* is hot for a CPU.

EDIT:

Idles at about 32*C
Last edited by HuckleberryWill; 16th Dec 2012 at 10:24.
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Old 16th Dec 2012, 10:15   #2
zakblood
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can't say either, but why a stock cooler? fit a better one and it will be loads better,

i have a i7 2700K 3.50GHz @ 4.20GHz DDR3 with a Zero Infinity Phantom CPU Cooler, and its running 24/7 at 31c with 20% load, only gets to 41c at 70% and not got any higher as nothing i use pushes it more atm

Advice is only an opinion, and is also like leafs off a tree, the wind blows and it goes in all directions
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Old 16th Dec 2012, 10:17   #3
HuckleberryWill
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Originally Posted by zakblood View Post
can't say either, but why a stock cooler? fit a better one and it will be loads better,

i have a i7 2700K 3.50GHz @ 4.20GHz DDR3 with a Zero Infinity Phantom CPU Cooler, and its running 24/7 at 31c with 20% load, only gets to 41c at 70% and not got any higher as nothing i use pushes it more atm
I am going to get a different cooler ASAP, but can't afford one just yet. I built my PC yesterday and just want to make sure nothings gonna melt if I play Crysis.
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Old 16th Dec 2012, 11:46   #4
IceWind
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Your best to keep the new FX cpus under 65oC

Prime 95 is a worst case scenario benchmark.... so worst case scenario your cpu will hit 59oc ( ambient tempreature dependent )

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Old 16th Dec 2012, 12:41   #5
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yeah Prime really gets these FX chips heated right up, mine gets rather hot in Prime even though its water cooled.

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Old 16th Dec 2012, 12:45   #6
zakblood
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i started to get worried when i saw others posting temps, mine seemed far lower and did wonder if it was right, but keep checking it and very happy with cooler and case, followed guides on here and dl'ed the stuff and ran them, still cool so still very happy, give it time and something to push it and away from winter the temps might rise more.

Advice is only an opinion, and is also like leafs off a tree, the wind blows and it goes in all directions
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Old 16th Dec 2012, 12:51   #7
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to be fair, rather than clock the whole CPU as a whole, tends to be better off clocking it a bit and then using a bunch of very aggressive Overdrive profiles for different situations, where you can maximise the strengths and try to minimise the weaknesses of the processors.

Bulldozer FX-8120 4.6GHZ // [COLOR=DarkOrangeGigabyte 990FXA-UD3[/color] // 16Gb Kingston HyperX DDR3 // MSI HD7850 // Samsung Spinpoint 750Gb x 2 // OCZ Z-Series PSU // Custom Watercooling Setup //
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Old 16th Dec 2012, 13:21   #8
HuckleberryWill
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Quote:
Originally Posted by IceWind View Post
Your best to keep the new FX cpus under 65oC

Prime 95 is a worst case scenario benchmark.... so worst case scenario your cpu will hit 59oc ( ambient tempreature dependent )
Thank you! Playing Cryis's is safe.
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Old 16th Dec 2012, 14:17   #9
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If you take Prime95 stability seriously Piledriver will drive you mad even with a high end cooler/watercooling, you'll struggle to get any sort of overclock whilst keeping temps in check under stress testing.

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Old 16th Dec 2012, 14:36   #10
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Originally Posted by mmj_uk View Post
If you take Prime95 stability seriously Piledriver will drive you mad even with a high end cooler/watercooling, you'll struggle to get any sort of overclock whilst keeping temps in check under stress testing.
What temp does it shutdown/throttle at?
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Old 16th Dec 2012, 14:37   #11
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Left the window open (its cold outside) got back and the CPU was idling at 29*!
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Old 16th Dec 2012, 15:35   #12
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Quote:
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What temp does it shutdown/throttle at?
I've not witnessed a shutdown yet but I've seen throttling occur at just 4.6ghz and that was under water, there doesn't seem to be a way to cool the socket temp which skyrockets out of control under Prime95 testing. I have just been running it at stock since.

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Old 16th Dec 2012, 15:37   #13
HuckleberryWill
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Originally Posted by mmj_uk View Post
I've not witnessed a shutdown yet but I've seen throttling occur at just 4.6ghz and that was under water, there doesn't seem to be a way to cool the socket temp which skyrockets out of control under Prime95 testing. I have just been running it at stock since.
Ok, thanks!
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Old 16th Dec 2012, 17:11   #14
~Dockie
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Shutdown occurs at ~90c for my 6200. i would think yours would be similar

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Old 16th Dec 2012, 17:46   #15
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Shutdown occurs at ~90c for my 6200. i would think yours would be similar
Thank you!
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Old 16th Dec 2012, 17:47   #16
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Shutdown occurs at ~90c for my 6200. i would think yours would be similar
It'd throttle well before it hits 90c.
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Old 16th Dec 2012, 17:53   #17
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It'd throttle well before it hits 90c.
So, 60*C is fine, ?start throttling above that?, will shutdown at 90*C.
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Old 16th Dec 2012, 18:22   #18
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Quote:
Originally Posted by HuckleberryWill View Post
So, 60*C is fine, ?start throttling above that?, will shutdown at 90*C.
Yep AMD say 62C is the limit but that it has about 5C of head room anyway, so late 60s is probably when throttling starts to occur.

Not sure why it is so low for AMD when the die itself can cope with much hotter, if Intel had the same 62C limit their CPU's would be just as big a headache to cool/overclock. I think it's probably a result of recycling an old socket so much over the years.

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Last edited by mmj_uk; 16th Dec 2012 at 18:25.
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Old 16th Dec 2012, 19:01   #19
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The limit is due to the fact that AMD uses SOI technology for their CPUs, which is different from how the Intel ones are fabricated. It's harder to remove heat from the die with SOI.
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Old 16th Dec 2012, 19:10   #20
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So, 60*C is fine, ?start throttling above that?, will shutdown at 90*C.
I'd be surprised if it got much further than 70c before crapping out.
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Old 16th Dec 2012, 20:29   #21
~Dockie
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It'd throttle well before it hits 90c.
I had a reading of 88c via coretemp and it shutdown shortly after, i assume once it hit 90.

Next time i do a prime95 run ill check the socket temp aswell, just to be sure.

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Old 16th Dec 2012, 22:09   #22
PCZ
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Originally Posted by mmj_uk View Post
If you take Prime95 stability seriously Piledriver will drive you mad even with a high end cooler/watercooling, you'll struggle to get any sort of overclock whilst keeping temps in check under stress testing.
That is so true.

If you try and keep under the recommended maximums then forget stress testing at high clocks.
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Old 18th Dec 2012, 10:19   #23
nkata
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Using a Phanteks, the socket temp is about +5C over the 'core temps' at 4.6GHz on prime. I have been priming at 4.6GHz with the socket at 67C and cores at 62-3C. I have observed no throttling at these temps. Similarly x264 bench at 5GHz does not throttle at similar socket temps although extended eight core usage at 5GHz will very quickly start to become too hot and is definitely not prime stable. Daily use at 5GHz does not seem to be a problem although much of the time it is idling.

I'm back after two weeks of enforced absence. sorry mods.

Last edited by nkata; 18th Dec 2012 at 10:24.
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Old 18th Dec 2012, 11:16   #24
PCZ
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You wont see throttling at 67C.
That is quite low for 4.6Ghz P95.

Have you done any testing with small fft's ?
If you leave blend running long enough it will cycle through them.
8k and 12k are the worst heat wise.
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Old 18th Dec 2012, 12:03   #25
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i get throttling at around 65C under prime95

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Old 18th Dec 2012, 12:38   #26
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i get throttling at around 65C under prime95
Thats low, is it your CPU throttling or the MB protecting the VRM's ?
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Old 18th Dec 2012, 14:35   #27
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Thats low, is it your CPU throttling or the MB protecting the VRM's ?
I'm guessing its the VRM's but there meant to throttle at around 65 / 70 anyway as its not reccommended to go over 70C with piledriver.

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