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R9 290x CF Horrible Performance? - Page 5

post #41 of 103
Dual 290Xs @ load=700w at least.
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post #42 of 103
Thread Starter 
Quote:
Originally Posted by p4inkill3r View Post

Your estimate for load wattage may be a bit on he conservative side:


Thats system wattage though not the cards, 220 watts each is what they should pull and on GPUz I have only seen them pull a max of 217 each but I dont know how accurate that is
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post #43 of 103
Quote:
Originally Posted by Renton577 View Post

Thats system wattage though not the cards, 220 watts each is what they should pull and on GPUz I have only seen them pull a max of 217 each but I dont know how accurate that is
they pull far more than 220W. A 290 non x pulls more. and that's average power draw, if the avg is around 220w then expect spikes around 270w or more.
post #44 of 103
i had similar issues, for me it was actually multidisplay causing the problem.
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post #45 of 103
Thread Starter 
Quote:
Originally Posted by Klocek001 View Post

they pull far more than 220W. A 290 non x pulls more. and that's average power draw, if the avg is around 220w then expect spikes around 270w or more.

Well both 290x's are running stock clocks and power, and 220 watts are the peak of what I have seen and 160-180 is what I see them usually hover around, also Dieanotherday I tried unplugging my second monitor and the result was the same
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post #46 of 103
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post #47 of 103
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After some more in depth tests it looks like the issues is indeed the PSU, cards would alternate raising and lowering their wattage intake as well as dropping below 11.65v every now and then, not to mention the clock speeds could never reach max, looks like I will just have to use my GTX 970 until I can pick up a suitable replacement PSU
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post #48 of 103
Quote:
Originally Posted by Renton577 View Post

After some more in depth tests it looks like the issues is indeed the PSU, cards would alternate raising and lowering their wattage intake as well as dropping below 11.65v every now and then, not to mention the clock speeds could never reach max, looks like I will just have to use my GTX 970 until I can pick up a suitable replacement PSU
Good to see you confirm it.
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post #49 of 103
the 8320 is bottlenecking your gpus
Quote:
Originally Posted by p4inkill3r View Post

rolleyes.gif
No.

you're a silly goose if you think the 8320 wont bottleneck 290x crossfire,a 8350 bottlenecked my 280x crossfire by quite a bit and mine was 4.8ghz.

not in firestrike but in everything else pretty much
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post #50 of 103
Quote:
Originally Posted by Renton577 View Post

After some more in depth tests it looks like the issues is indeed the PSU, cards would alternate raising and lowering their wattage intake as well as dropping below 11.65v every now and then, not to mention the clock speeds could never reach max, looks like I will just have to use my GTX 970 until I can pick up a suitable replacement PSU

Well that's no surprise since you're using a trash power supply especially with 3 power hungry components (AMD processor, 2 290X's). Klocek001 pointed that out earlier.
    
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