Dual Non SLI Graphics Cards PSU Req

Currently i am using a PNY GTX 650 2gb and was thinking of adding my spare PNY GTS 250 1gb in for Phyx processing. Currently i have a
"ZT Series 550 Watt ATX Modular Power Supply"
Would that power supply be enough to run those cards together and my whole system?

Complete Comp Specs:
CPU: FX 8320 Black Edition 3.5GHz AM3+ Boxed Processor
MB: M5A97 R2.0 Socket AM3+ ATX AMD Motherboard
RAM: 4x(Vengeance Series 4GB DDR3-1600 (PC3-12800) CL9 Dual Channel)
PSU: ZT Series 550 Watt ATX Modular Power Supply
SDD: Agility 3 AGT3-25SAT3-240G 240GB SATA 6.0Gb/s 2.5
HD: 2x(Momentus 500GB 5,400 RPM SATA 3Gb/s 2.5)
FANS: 4 (3 LED)
CPU Cooling: Antec - Kühler H2O 620 Liquid Cooling System
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More about dual sli graphics cards psu req
  1. Best answer
    Well, the maximum tdp of the GTS 250 is 150W, the 650 gtx is 64W, in load(gaming and when the game supports physX) it will be around ~190-200W tops, even with the that cpu and the rest of the stuff, it will do, that psu is a quality one, with 45A on the +12v rail, which means it has 540W available.
  2. For a system using a single GeForce GTX 650 along with a single GeForce GTS 250 graphics card a minimum of a 550 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 32 Amps or greater and that has at least two 6-pin PCI Express supplementary power connectors is recommended.

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

    Overclocking of the CPU and/or GPU(s) will 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.
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