Power supply for a Gtx 260

[Beter 2 Burn Out]

Hello,
I need help regarding the power supply for my new Graphics card GTX 260 of the Asustek brand. Currently i am running Quad core intel. It has a 500 Watt power of the brand Antec. what Will be the sufficient power supply for my GTX 260.

[Archibald]

A GeForce GTX 260 requires you to have a 500 Watt power supply unit at minimum if you use it in a high-end system. That power supply needs to have (in total accumulated) at least 38 Amps available on the 12 volts rails. A GeForce GTX 280 requires you to have a 550 Watt power supply unit at minimum if you use it in a high-end system. That power supply needs to have (in total accumulated) at least 40 Amps available on the 12 volts rails.

[ApPy10]

GeForce GTX 260 SLI requires you to have a 700 Watt power supply unit at minimum if you use it in a high-end system. That power supply needs to have (in total accumulated) at least 50 Amps available on the 12 volts rails.
GTX 280 requires you to have a 800 Watt power supply unit at minimum if you use it in a high-end system. That power supply needs to have (in total accumulated) at least 55 Amps available on the 12 volts rails. 3-way SLI .