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7990 bottlenecked by FX-8350 due to vdroop. PSU or Mobo?

#21fuzzymanPosted 8/22/2013 6:08:13 PM
PSU hello
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#22TheFeshPince(Topic Creator)Posted 8/22/2013 6:09:12 PM
fuzzyman posted...
PSU hello


You win for best wallpaper in your signature.
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#23DarkZV2BetaPosted 8/22/2013 6:41:23 PM
It's neither. If voltage is dropping to 0.9v, your CPU is dropping to idle clocks. More likely heat related.
1.4v shouldn't drop down past 1.3 in the worst of cases. 0.9v, you'd get instant bluescreen.
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#24fuzzymanPosted 8/22/2013 6:43:32 PM(edited)
It could be heat but I reckon a 450W GPU and 220W CPU are going to blast that CX750

what's your voltage on the FX8350 TC?
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#25fuzzymanPosted 8/22/2013 6:51:34 PM(edited)
My FX8320 @4.6Ghz

~1.440V with peak voltage of 1.456V

Temperature of 50C (limit 61C) during most demanding benchmarks, core temp below 60C (limit 71C)

anyway, CPU binnings vary and the only method of permanently removing throttle is disable the power saving features and make your PC lock-up until you solve the PSU and thermal issues, TC

I recommend an AX860 MINIMUM, which is much better efficiency rated (>90%)
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#26GreenMage7Posted 8/22/2013 6:49:44 PM(edited)
fuzzyman posted...
It could be heat but I reckon a 450W GPU and 220W CPU are going to blast that CX750

what's your voltage on the FX8350 TC?


He said it's around 1.4v but didn't give an exact number. There are a multitude of things it could be that's why it would have to be figured out by a step by step process. I mentioned the board and cpu cooler the first time as well because Dark is right (I can't believe I just said that) about it being in line with an overheat.

Actually, you never did say what CPU cooler you were using or what your temps were at the time of these problems.
#27fuzzymanPosted 8/22/2013 6:50:22 PM
It can't be 'around' 1.4V

overvolting is serious business and depending on your motherboard, cooling, power, and CPU, well, there are many things that can change what voltage you use

need to know exactly what voltage it is set at in BIOS and what voltage is read during a benchmark like Wprime
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#28GreenMage7Posted 8/22/2013 6:52:02 PM
fuzzyman posted...
It can't be 'around' 1.4V

overvolting is serious business and depending on your motherboard, cooling, power, and CPU, well, there are many things that can change what voltage you use

need to know exactly what voltage it is set at in BIOS and what voltage is read during a benchmark like Wprime


I am aware of that, I just repeated what he said in his original post.
#29fuzzymanPosted 8/22/2013 6:54:06 PM
anyway, I find that using LLC highest settings (at least with Gigabyte mobo)

in combination with a slightly lower voltage (lower than with LLC set to auto)...

gives stability at a lower voltage and better temperatures
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#30PanopictonguyPosted 8/22/2013 6:54:15 PM
What games @ what resolutions are you trying to play? Out of curiosity.
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