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Possible PSU problem with 290 xfire?

Orangey

Orangey

Orangey

Soldato
Joined
22 Aug 2008
Posts
8,338
I am running a 2600K @ 4.7 1.48v and 2 290 pros @ 1200/1500 +150mv offset on a Seasonic X-Series 850W Gold. I can run Firestrike Extreme no prob all day long but Sleeping Dogs bench causes my system to exhibit the following behaviour:

-sounds like light rain hitting window emanating from around GPU/PSU area
-PSU spins up, very warm air exhausting
-PC reboots

Do the 290s really draw that much when OC'd? What should I do?
 
Lol sleeping dogs. I can exhibit the same thing with my 7990 if i run a large overclock. Not sure if its our psu's or our gpu's begging for mercy. My money is on the psu. Always happens on the final scene indoors. Something about that scene draws a massive amount of wattage.
 
I'm running a 2600k at 4.6 at 1.3v and 2 x 290's at stock (947/1250). During the sleeping dogs bench I am pulling around 700W-790W from the wall, which equates to 670W-ish after factoring in PSU efficiency of 85%. This is all from an XFX 750W Core PSU. I can fully believe that overclocking and overvolting the GPUs will easily overwhelm even an 850W PSU, which is one of the reasons I haven't overclocked my GPUs yet (the others being I haven't needed to in any game to make it playable, and it's noticeable but not loud currently and I don't want to make it any louder).

I would say a bigger PSU is needed if you want to run those kind of clocks/volts on both your CPU & GPUs.
 
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