PSU for GTX 760?

Recommend PSU rating on that card is about 600w. You also have other components to run. Look up an online calculator for your potential power draw of your whole system, then look around accordingly. I would also recommend getting one with a nice rating of 80%+ efficiency.
 
For a system using a single GeForce GTX 760 graphics card NVIDIA specifies a minimum of a 500 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 30 Amps or greater and that has at least two 6-pin PCI Express supplementary power connectors. Some of the non-Reference Design GeForce GTX 760 cards have a single 8-pin or two 8-pin or one 6-pin and one 8-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most critical factor.

Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.

XFX 550W PRO Series Core Edition
• OEM: Seasonic
• maximum combined +12 Volt continuous current rating of 44Amps
• one 6-pin and one (6+2)-pin PCI Express supplementary power connectors
• 80 PLUS BRONZE Efficiency Certification
• 5 year warranty, must be registered within the first 30 days. If not registered within 30 days, the standard warranty length is 2 years
• Link: http://us.ncix.com/products/?usaffiliateid=1000031504&sku=59615&vpn=P1550SXXB9&manufacture=XFX
 

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