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R9 290 tricool crossfire overclocked to the max will seasonic x-series 850w gold be enough for that ?! - Page 3

post #21 of 42
Quote:
Originally Posted by vlps5122 View Post


spent 10 mins cant find it but brazilian guy on youtube with 2 r9 r90x's at 1.4v and 1300/1600 and a 4960x, pulling 1400-1500w from the wall, when he added the 3rd he was around 2000watts. kingpins pull around the same when highly overvoled/overclocked. let me know if you find the video and post it here please, i will try to find it on my next break from work.

 

Yeah, but that's with a 4960X.

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post #22 of 42
Thread Starter 
Quote:
Originally Posted by TwoCables View Post

Yeah, that will definitely be fine because the CPU will basically be idling. So, your power consumption will be sitting at roughly 825-900W.

can i be greedy and expect to run 4 of those on that psu redface.gif
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post #23 of 42
Quote:
Originally Posted by TwoCables View Post

Yeah, but that's with a 4960X.

with a 4770k at most it would be 100 watts less, so 1300-1400watts, im also not positive it was a 4960x just assuming because of the rest of his setup but yeah
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post #24 of 42
Quote:
Originally Posted by invincible20xx View Post


can i be greedy and expect to run 4 of those on that psu redface.gif

 

That will not be good for a 24/7 full load.

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post #25 of 42
Thread Starter 
Quote:
Originally Posted by TwoCables View Post

That will not be good for a 24/7 full load.

will hit around 1200w ? no ?

note that i will be doing @ least 100mv undervolt and maybe more in case i run 4 gpus of off it
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post #26 of 42
Quote:
Originally Posted by invincible20xx View Post


will hit around 1200w ? no ?

note that i will be doing @ least 100mv undervolt and maybe more in case i run 4 gpus of off it

 

But for a 24/7 load, it's best to keep the power consumption between 50-70% of the PSU's total capacity. The closer to 50%, the better, but it's ok to go a little higher. It's no big deal.

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It's a computer!
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post #27 of 42
I've been running HD6990+HD6950@6970 overclocked in Tri-Fire for months with my Seasonic X-850 Gold PSU. Hell, I've even ran Quad-Fire HD6970 for a few days to make a review biggrin.gif. Then I upgraded to Asus Matrix HD7970GHz Platinum + XFX HD7970GHz DD overclocked in CF for a few months too.

I have 7 internal HDDs, one SSD and 3 External HDDs plus my Core i7 920@4.25.

I game alot and never encountered a stability issue but of course never pushed it 24/7 full load lol.

Depending on the rest of your system and the difference in power consumption between my old Core i7 and yours, I think you should be safe. Seasonic X-850 Gold is one hell of a PSU and even a good PSU like Antec 850W True Power Quattro that I had before could only be stable with HD6990, gave me problems with Tr-Fire 6970 and couldn't even run with Quad-Fire 6970 so I replaced it with the Seasonic.
post #28 of 42
Quote:
Originally Posted by minaelromany View Post

I've been running HD6990+HD6950@6970 overclocked in Tri-Fire for months with my Seasonic X-850 Gold PSU. Hell, I've even ran Quad-Fire HD6970 for a few days to make a review biggrin.gif. Then I upgraded to Asus Matrix HD7970GHz Platinum + XFX HD7970GHz DD overclocked in CF for a few months too.

I have 7 internal HDDs, one SSD and 3 External HDDs plus my Core i7 920@4.25.

I game alot and never encountered a stability issue but of course never pushed it 24/7 full load lol.

Depending on the rest of your system and the difference in power consumption between my old Core i7 and yours, I think you should be safe. Seasonic X-850 Gold is one hell of a PSU and even a good PSU like Antec 850W True Power Quattro that I had before could only be stable with HD6990, gave me problems with Tr-Fire 6970 and couldn't even run with Quad-Fire 6970 so I replaced it with the Seasonic.
6970=/=290x....

The 290/x boards take a hell of a lot more power than the 69xx boards, especially when OC'ed.

Like I said before, expect heavily OC'ed 290/x to take more than 325w DC per GPU...
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post #29 of 42
Quote:
Originally Posted by chiknnwatrmln View Post

6970=/=290x....

The 290/x boards take a hell of a lot more power than the 69xx boards, especially when OC'ed.

Like I said before, expect heavily OC'ed 290/x to take more than 325w DC per GPU...

Yeah, i did a small test a few months ago with my cards in m 4770k system, power would be about 150w higher now that i have a 1.5v 3930k in the system. Stock voltage 290x isn't to much of a hog, a gaming load on a 850w psu would be fine with stock voltage/clocks.

These are from a meter at the wall, all test done with CPU at idle and it was a horrible chip 4.5ghz at 1.42v to stabilize it.

4770k at 4.5ghz with 2 stock clock/voltage 290x my rig pulled 698w
same cpu clocks stock voltage at 1100/1500 290x's pulled 827w
again same cpu clocks with 290's at +100mv 1200/1700 pulled 1176w (So you can see voltage to 290x really bumps up power usage, by 350w or so to be exact, so an extra 150w per card!)
same cpu speed with 290x's at +200mv 1300/1800 (not stable but it ran furmark for like 2-3 min to test this) power draw was 1253w

So my EVGA 1300 G2 is at like 90% efficiency so my heaviest load with just graphics at full power is around 1125w, so if i loaded up the cpu and furmark at the same time i would be pushing nearly 100% of my 1300w power supply.
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post #30 of 42
Quote:
Originally Posted by ShortySmalls View Post

Yeah, i did a small test a few months ago with my cards in m 4770k system, power would be about 150w higher now that i have a 1.5v 3930k in the system. Stock voltage 290x isn't to much of a hog, a gaming load on a 850w psu would be fine with stock voltage/clocks.

These are from a meter at the wall, all test done with CPU at idle and it was a horrible chip 4.5ghz at 1.42v to stabilize it.

4770k at 4.5ghz with 2 stock clock/voltage 290x my rig pulled 698w
same cpu clocks stock voltage at 1100/1500 290x's pulled 827w
again same cpu clocks with 290's at +100mv 1200/1700 pulled 1176w (So you can see voltage to 290x really bumps up power usage, by 350w or so to be exact, so an extra 150w per card!)
same cpu speed with 290x's at +200mv 1300/1800 (not stable but it ran furmark for like 2-3 min to test this) power draw was 1253w

So my EVGA 1300 G2 is at like 90% efficiency so my heaviest load with just graphics at full power is around 1125w, so if i loaded up the cpu and furmark at the same time i would be pushing nearly 100% of my 1300w power supply.
Yeah 2 290's stock on a 850w PSU will be fine but the OP was wondering about heavily OC'ing them.

Also random but Furmark sucks imo, it provides useless information as no normal benchmark or game is gonna make the GPU draw that much power. The most demanding of my games is easily Skyrim (too many mods to count, high end ENB, 4800x900 res) which gives me 90-100% GPU load the entire time, highest I've seen power usage at the wall during gaming is like 525w. 92% efficient PSU.

Heaven/3dmark brings me to about 530 or so watts. Highest I've gone is +225 or so mV, that brought me over 550w...

Fun fact, that's about 3/4 horsepower.
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