So I built my PC (after waiting for almost a month to get all the components together) with an AMD FX 8350 in it and it runs just fine. A friend of mine OC'd it to 4.4 GHz at 1.5V. It idles around 40, Battlefield 3 ultra on 60 fps, it doesn't get much hotter than 60 degrees (I've played for around an hour now). However, when I run Prime95 to stress test my CPU, it goes above 80 degree with in 30 seconds.
As far as I know, this is a bad thing, since you should be able to run prime95 stable for at least a couple of hours to really see if it's OC'd well.
Can somebody help me out?
Even worse is those chips start to throttle at 62c just downclock a little 1.5v's is pushing it anyway.
My chip starts to throttle at 61c it will drop the cpu from 3.5Ghz to 1.4Ghz for a cupple of seconds to drop the heat then gos back to 3.5Ghz(ive been retseting it to day as its so hot in my place 32c in here!)
http://i.imgur.com/DMP1Rny.jpg
Lower the voltage. It's fine if you only play games but your PC will just turn off because of overheating if you start converting video or something else that fully loads all cores.
What would you guys recommend as a voltage (or at least the range I should be looking for)?
I'm looking to get 4.4 GHz with the FX 8350, I have the ASUS Sabertooth 990fx R2.0 motherboard, my cooler is the Coolermaster Hyper 212 EVO. Oh, my RAM is 1600 MHz (not sure if that matters, but I'm gonna put it here anyways ;))
Just keep lowering the voltage gradually until it is no longer stable (aka Prime95 crashes it). Its hard to say on a range as each CPU is different. My 8350 achieves 5.0GHz at just 1.36v.
1.5V is way too much even for a bad piece of silicon at 4.4 GHz. All of the 8350s in production, even the bad silicon ones can do 4.4GHz with 1.38v-1.416v, maybe 1.428v at the most. You shouldn't even need 1.5v until you get up to 4.8 GHz and higher depending on the silicon you have. Take my advice, don't bother with Prime95 as it was coded for older CPUs from the ninties and early two thousands it also has not been updated since the release of bulldozer so if you use Prime95 with a vishera it will think it's a Bulldozer. Get AIDA64 and use the stability test it has because it's actually certified for windows, prime95 is not.
start lowering your voltage by 0.05 increments in the BIOS - run prime95. Open event viewer and look for WHEA-2 errors (under system tab look for yellow triangles not red critical marks) - these are core internal parity check errors from too low voltage. You can have these errors and still not crash prime but you will need to increase voltage or lower your clocks. If you are just gaming I probably would not bother with much of an overclock anyway - especially if you are running hot - it will just shorten your cpu life and increse your power bill
I wouldn't even bother using Prime95 to stability bench a modern CPU unless you plan on using Folding @ Home or CPU Bitcoin mining as Prime95 does not equate to real world CPU load under normal operational and gaming conditions. AIDA64 is way more reliable along with a DX11 looping benchmark like Unigine Heaven and Valley for testing real world stability.
On my 8350 I'm at 4.4 at 1.3875v and It throttles down to 1400mhz after hitting 54C. I feel like that is incredibly low, but as long as my cooler stays clean it never gets that high unless I'm running prime95. I feel like my experience with the 8350 is far from most people's and I'm not sure why.
Enable High performance Computing mode, it removes thermal throttling.
nah, it gives it the heaviest load possible, which is waht you want. it's called having a safety margin. over-test to make 100% sure of stability
Sure keep believing that as you burn the transistors in your silicon. I'm not going to continue arguing this point with people that OCCT and Prime95 destroy your modern CPU. Not only does it do this but they also hold back the overclockability of your system.
In my 4770 thread I had temps up to 100 on stock cooler and TIM. Prime95 in place fft on the same puny cooler with AS5 gave 95. Batojiri is right about prime95, at least the in-place test. I got around 80 (86 max on one core) on blend test and intel extreme tuning utility, and this is on stock cooler and clockspeed using AS5 and energy savings enabled (it's adaptive anyway, so there's no real energy saving when turbo mode is on). I didn't have this problem with 2nd gen Core2Duo, but those are from 2008.
And 1.5v is way too high for a cpu, even if it's a bad chip. You don't just overvolt to get stabillity, you're gonna fry it soon if you don't back up. There's absolutely no danger in undervolting, except stabillity issues which you fix by putting time in testing and setting the lowest possible stable voltage.
