Dual Non SLI Graphics Cards PSU Req

[Zacherial]

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"
(http://www.microcenter.com/product/376717/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
SATA: DVD/CD RW
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

 

[djangoringo]

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.

 

[ko888]

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.