|Do you have a power supply with enough +12v amperage to fulfill the needs of 2x 295 GTX's?|
"The power consumption levels of the GeForce GTX 295 are extreme, though this is to be expected for such a high-end performance part. Under load the GeForce GTX 295 system configuration sucked down 434 watts, which will likely have a negative impact on the power bill."
"The GeForce GTX 295 managed to use slightly less power than the 4870 X2 under load, but it was a little more hungry at idle. Furthermore, the GeForce GTX 295 used just 7% more power than the GeForce GTX 280 when under load, while it did suck down 34% more power at idle.
Bottom-line when talking about power consumption is that the GeForce GTX 295 requires a truck load, but no more than similar competing products."
"Recommended Power Supply
So here's my power supply recommendation:
GeForce GTX 295
A GeForce GTX 295 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.
GeForce GTX 295 Quad SLI
A second GeForce GTX 295 requires you to add another 300 Watts. You need a 1000 Watt power supply unit if you use it in a high-end system. That power supply needs to have (in total accumulated) at least 70 Amps available on the 12 volts rails."