I only do basic overclocks with my cards, so i increase the GPU/memory clocks until it's stable, but leave voltage alone.
[URL="http://www.anandtech.com/show/6359/the-nvidia-geforce-gtx-650-ti-review/20"]Here[/URL] is a list of stats that may help you, regarding the settings for a GTX 650 Ti. be aware that cards can vary, so you may get your card upto a certain amount, but someone with an identical card may not & vice versa, it's luck of the draw sometimes. Don't bump the card to the max settings either, move up gradually & test it for stability. And down clocking when it''s not.
Increasing voltage is where a lot of increased heat comes from, so keep a check on what temp's your getting. 70-80c is high, but acceptable, anything more and i'd be concerned. You could lower the GPU/memory clock a little at a time, 10-20mhz, this may fix it also.
Ensure you have the latest drivers from Nvidia's website for your card & operating system.
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Last edited by fatcobra; 12-06-2013 at 04:23 PM.