For a system using two GeForce GTX 760 graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 700 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 50 Amps or greater and that has at least four 6-pin PCI Express supplementary power connectors. Some of the non-Reference Design GeForce GTX 760 cards have a single 8-pin (e.g. ASUS GTX 760 DirectCU II OC) or two 8-pin (e.g. MSI GTX 760 HAWK) or one 6-pin and one 8-pin (e.g. Gigabyte GTX 760 WindForce OC, EVGA GTX 760 SC w/ACX Cooler, MSI GTX 760 TwinFrozr Gaming) 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) 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.
OCZ ZS Series 550W (OCZ-ZS550W)
• OEM: Sirtec
• maximum combined +12 Volt continuous current rating of 38 Amps
• one 6-pin and one (6+2)-pin PCI Express supplementary power connectors
• Modular Output Cables: No
• Official Haswell Compliance: Yes (independently regulated design)
• 80 PLUS BRONZE Efficiency Certification
• 3 Year Limited Warranty
OCZ ZT Series 550W (OCZ-ZT550W)
• OEM: Great Wall
• maximum combined +12 Volt continuous current rating of 45 Amps
• two (6+2)-pin PCI Express supplementary power connectors
• Full Modular Output Cables: Yes
• Official Haswell Compliance: Yes (independently regulated design)
• 80 PLUS BRONZE Efficiency Certification
• 5 Year Limited Warranty
OCZ Fatal1ty 550W (OCZ550FTY) Discontinued
• OEM: Sirtec
• maximum combined +12 Volt continuous current rating of 37.5 Amps
• one 6-pin and one (6+2)-pin PCI Express supplementary power connectors
• semi-Modular Output Cables: Yes
• Official Haswell Compliance: No
• 80 PLUS Efficiency Certification
• 3 Year Limited Warranty
OCZ Fatal1ty (New) 550W (OCZ-FTY550W)
• OEM: Sirtec
• maximum combined +12 Volt continuous current rating of 41.25 Amps
• two (6+2)-pin PCI Express supplementary power connectors
• Full Modular Output Cables: Yes
• Official Haswell Compliance: No (group regulated design)
• 80 PLUS BRONZE Efficiency Certification
• 3 Year Limited Warranty
OCZ Z Series 550W (OCZZ550) Discontinued
• OEM: FSP
• maximum combined +12 Volt continuous current rating of 44.5 Amps
• one 6-pin and one (6+2)-pin PCI Express supplementary power connectors
• Modular Output Cables: No
• Official Haswell Compliance: No (group regulated design)
• 80 PLUS SILVER Efficiency Certification
• 5 Year Limited Warranty