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GTX 560 Overclock Problems

Last response: in Overclocking
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March 14, 2011 3:45:46 AM

Recently put in a GTX 560 and kept my 8800gt as a dedicated physx card. PSU is a PC Power and Cooling 610 Watt. 560 is hooked up with 1x6 pin and 1x6+2 pin. 8800 is hooked up with the 2x4 pin adapter to 6 pin. Using MSI Afterburner to adjust voltage and overclock. Force constant voltage is checked in Afterburner. No overclock is made to the 8800 GT.

Overclock with voltage mod does not work well, or rather, with stability in any game. Overclocking voltage to 1110 volts, from the standard 1012 volts, and raising my core clock to exactly 1ghz.

Overclock w/out voltage mod works for at least an hour in games like starcraft 2, crysis 2, or TF2. No overclock settings seem to work in physx games, however, (specifically metro 2033 and Batman AA) regardless of the voltage. Also, CPU is e6550 overclocked to 3.16 fully stable.

Is the PSU just not enough to add more voltage to the 560 and keep the 8800 GT on? The physx enhancements are pretty noticeable in Batman... but I already played the crap out of that game. Metro is pretty terrible, and with the lack of news on physx games, it seems like a good idea to just take out the 8800 and sell it. Oh well.


Any buyers? Make me an offer.

March 15, 2011 7:00:06 PM

So no advice, and nobody thinks the power supply is too low?

I see.
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March 16, 2011 12:51:45 AM

well i think if you want to know if the power is to low then just pull out the 8800 gt and rerun all the test i should think that will give you the answer also i cant imagine that the gtx560 is not enough card for gaming it is a bad ass card the gf114 is a really nice chipset just donate the 8800 to someone that needs it.
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March 16, 2011 3:33:51 AM

phenom-opteron said:
well i think if you want to know if the power is to low then just pull out the 8800 gt and rerun all the test i should think that will give you the answer also i cant imagine that the gtx560 is not enough card for gaming it is a bad ass card the gf114 is a really nice chipset just donate the 8800 to someone that needs it.


Yes... I suppose that would.

Any possibility the processor is a bottleneck? I've looked at some benchmarks with quad core processors running faster. Some are similar... some are 15 fps better.

I don't know. Do want the most out of my card so I should figure this out sooner than later.
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March 17, 2011 7:14:51 AM

So it is certainly the power, and almost certainly a bottleneck.

Although it is a very high quality power supply, and my parts are solid, it just can't give both cards and an overclocked CPU enough juice to run at full loads. Think I'll look for the best q9450 deal on ebay and sell my 8800 and 6550... in order to pwn. Sell 4 of my 8 gigs of RAM and end up upgrading for like ~220 dollars. Wow I'm a genius.

Thanks for the help all!


Bah.
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