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AMD Phenom II x6 vs FX-8350

Asus VRMs benefit hugely from airflow over them.

From my m5a97 Evo R2.0 the power will be throttled at around 75C (reported) temperature. This was a result of small FFTs in Prime with 4.5GHz 8320.

Prime is not very nice to modern CPUs.
 
5 ghz was doable for me with the same cpu and board but with a h100 cooler with extra fans for push-pull. I also needed a fan pointing at the vrms and I stuck another fan behind the mb.

Max CPU temp was 70 under prime small ffts but never throttled down. If the vrms get to hot it really ramps up the socket and cpu temps.

Voltages and settings are in the fx 83xx owners thread somewhere. I'll dig it out and post it later.
 
So the FX CPUs are bit more tolerant fo higher temperatures than the Phenom II CPUs?? IIRC,much above 60C was not that great for the latter. Just asking,as my mate could get his FX6350 closer to 5GHZ,but was worried about temperatures.
 
Warsam71 said:
Great results Humbug! The FX-8350 is an awesome CPU.
I'm not 100% sure about the max temps, but iirc it's 85C...I'll check with my team and get back to you.
Click to expand...

Do you happen to know what the safe VCore is for an FX-8350?
Temps were what restricted my OCing, but I think my Volts were quite high too. At some point I'm hoping to get it up and running again (seems a waste to be sitting there needing nothing more than a GPU and PSU (and a HDD I think). Especially as I have 2 spare GPUs (7950 and 670) and a spare PSU (or will have) and a couple spare HDDs.

EDIT: how did you guys do the Handbrake tests? (I use Handbrake a lot, but haven't used it as a benchmarking tool)
 
You normally don't want to go past 1.5v and usually temps will stop you first beyond that. I think AMD quoted 1.6v to 1.65v, though that scares the pants of me!!
 
cwgk91 said:
You normally don't want to go past 1.5v and usually temps will stop you first beyond that. I think AMD quoted 1.6v to 1.65v, though that scares the pants of me!!
Click to expand...

I think I was around 1.4v to get 4.5Ghz close to stable. I don't tend to get good clockers :(
Still I was playing a lot of Guild Wars 2 at the time and both chips (Phenom II X6 and FX-8350) were complete pants for that game. I think the FX-8350 was worse than the PII X6. I think I was running a 7950 in the PC with it and my FPS was usually under 40fps on highest setting at 1080p. Dropped a 4670K (and later a 4770K) and motherboard in instead and fps was usually around 60fps (which is what I limited it too to keep the HIS 7950 IceQ Boost quiet-ish).
 
Warsam71 said:
Great results Humbug! The FX-8350 is an awesome CPU.
I'm not 100% sure about the max temps, but iirc it's 85C...I'll check with my team and get back to you.
Click to expand...

Much appreciated Sam.

I should say the reason i have this CPU is thanks to AMD, Sam and Pcper. i was one of 25 FX-8350 winners at their Virtual Lan party #6.

http://forums.pcper.com/showthread.php?481520-Saturday-May-3-10-00-AM-ET-Virtual-LAN-party-6

pandem0nium said:
Great work with the benchmarks, very thorough.
Click to expand...

Hades said:
Great work humbug. Much appreciated.
Click to expand...

Thanks. :)
 
Davedree said:
Don't pay too much attention to p95 for stability with fx8,fx6 etc, (even though I have in my sig)
It just presents an unrealistic core load and temp load which doesn't represent the true stability of the system. You seem to be hitting the higher v-core a little bit too early for 4.6ghz but maybe theres some scope there for more, although temps are probably causing the higher v-core for stability, also adjusting the ht-ref and finding a sweet spot supposedly reduces the temps a little too.
Click to expand...


I managed to get Hand Break stable @ 4.6Ghz with 1.41v, CPU (Socket) peaked at 62c

its not stable in P-95, but i agree with what your saying, Hand Break is the most stressful 'real' application i use, if its stable in that then its stable, i don't see the point in trying to get it stable for 24/7 use in an application which pushes the CPU way beyond anything normal, besides that i have had CPU's stable in P-95 only for it to then fail in real apps.

I may try for 4.8Ghz later on, but on my £30 cooler i doubt that going to be viable for 24/7 use

i will be getting 2400Mhz RAM soon. its capable of running them so i can't not :D i think they may even push the gaming performance up another 5 to 10% vs the 1600Mhz RAM i'm running now.

And later possibly water cooling

Two or three of these and one of these for the VRMs and this as a better intake fan.
 
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GoogalyMoogaly said:
I think I was around 1.4v to get 4.5Ghz close to stable. I don't tend to get good clockers :(
Still I was playing a lot of Guild Wars 2 at the time and both chips (Phenom II X6 and FX-8350) were complete pants for that game. I think the FX-8350 was worse than the PII X6. I think I was running a 7950 in the PC with it and my FPS was usually under 40fps on highest setting at 1080p. Dropped a 4670K (and later a 4770K) and motherboard in instead and fps was usually around 60fps (which is what I limited it too to keep the HIS 7950 IceQ Boost quiet-ish).
Click to expand...

Thats what I found as well, though in some games (bf4, anything with mantle or one which runs 8 threads) the 8350 does fantastically well and maybe even wins slightly over the 4670k. Intel still does give more stable fps though

humbug said:
its not stable in P-95, but i agree with what your saying, Hand Break is the most stressful 'real' application i use, if its stable in that then its stable, i don't see the point in trying to get it stable for 24/7 use in an application which pushes the CPU way beyond anything normal, besides that i have had CPU's stable in P-95 only for it to then fail in real apps.

I may try for 4.8Ghz later on, but on my £30 cooler i doubt that going to be viable for 24/7 use

i will be getting 2400Mhz RAM soon. its capable of running them so i can't not :D i think they may even push the gaming performance up another 5 to 10% vs the 1600Mhz RAM i'm running now.

And later possibly water cooling
Click to expand...

Mines never been stable in p95 except at stock. My core 6 ALWAYS fails even going from 4Ghz to 4.1Ghz no matter what voltages I try.

If you're at 62C at 4.5Ghz you'll definitely need a better cooler for 4.8Ghz!
 
I think the voltage concerns on the Phenom II range were overplayed...I ran a Phenom II 550 for over 4yrs at 3.9Ghz & 1.50v and it never missed a beat even on a cheap aftermarket cooler with temps regularly hitting 60c in gaming.

The old fella is now enjoying a comfortable retirement as a media server, relaxing back in his rocking chair at 2Ghz & 1.15vlts, doing nothing more taxing than running 1080p movies....:)
 
I'm run 1.625v + through a phenom 710 x3. As it's a real dog of an overclocker and will only run 4 cores at 3.6 with that.

I've since dropped down to 3 cores @ 3.6 with 1.5625 v. Really is bottom of the barrel, but at least it was only £30.
 
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