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Not enough power to my gpu?

Last response: in Overclocking
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May 30, 2013 2:26:04 AM

I'm overclocking my gpu, and my overclock is stable, but on gpuz it always has spikes on the "perfcap reason" under "Pwr" and VRel and VOp. Mainly Pwr though, and i see it underclocks my gpu clock speed whenever it does, so i can only assume that my gpu isnt getting enough power, but i have a 650W 80 plus bronze psu, and my gpu is gtx 660 ti. What can i do?

More about : power gpu

May 30, 2013 3:08:09 AM

Who makers your psu -\ - exact model.
-Bruce
May 30, 2013 3:15:29 AM

It's an antec 650W green
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May 30, 2013 4:05:42 AM

What are your temps?
-Bruce
May 30, 2013 4:11:55 AM

On the graphics card? I've never seen it get above 65, usually hovering around 60-62
May 30, 2013 4:14:45 AM

If not OCed - will it operate normally? Played with the voltages?
-Bruce
May 30, 2013 4:17:56 AM

Yeah, I mean even now I was just playing Alan wake, and it seemed fine, fram rate dipped into the 40s for some reason sometimes though, it's just that even when playing a game on gpuz it tells me that the power is capping my performance in certain spikes, along with Vrel and VOp at all times
May 30, 2013 4:20:51 AM

Are you OCing core & memory? Memory is likely to have less effect - dial it back & play with core frequency. Do you use MSI Afterburner?
-Bruce
May 30, 2013 11:03:29 AM

Yeah I am, I got like +120 MHz on core and +550 MHz on memory, how much should I go?
May 30, 2013 11:23:08 AM

Try no OC on the memory - the core is trial - not all gpus will OC the same. Start at 100MHz & go up slowly - increments of 50MHZ and look at your temps in Afterburner.
-Bruce
May 30, 2013 12:01:45 PM

yeah thats what i did on the memory until i got to a stable 600 MHz overclock, then when i combined them i dialed it back to 550 MHz, now im going to try 500 MHz and see if that helps at all, but is it because im not supplying it with enough voltage?
May 30, 2013 8:34:43 PM

More Voltage generally gives higher clock - at the expense of power dissipation. Keeping your memory clock lower may help keep your power lower which in turn may allow you to go higher on the core clock.
-Bruce
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