Let's have a look at the temperatures the reference based custom cooler offers. The graphics card cooler performance examined PSU overload can cause it to break down.
spontaneous reset or imminent shutdown of the PC.What would happen if your PSU can't cope with the load?: There are many good PSUs out there, please do have a look at our many PSU reviews as we have loads of recommended PSUs for you to check out in there. You need a 650 ~700 Watt power supply unit. A second card requires you to add another ~200 Watts.On your average system the card requires you to have a 450 to 500 Watt power supply unit.Here is Guru3D's power supply recommendation: For example, the fastest clocked card in today's tests is the Palit Sonic Platinum at a blazing 800 MHz, we assume the card gets a slightly higher voltage and when we calculate it we get just over 175 Watts power consumption. Next to that you can clearly see that the faster clocked models have a little higher power consumption. The 1024MB models have more active ROPs to be fed, their power consumption as such is a little higher. Below a chart of measured Wattages per card. Mind you that the System Wattage is measured from the wall socket and is for the entire PC. Subjective obtained GPU power consumption = ~ 154 Watts.
You can now turn on your PC, boot into Windows, install the latest NVIDIA Forceware driver and after a reboot all should be working. Preferably the PEG headers come directly from the power supply and are not converted from the 4-pin Molex peripheral connectors. GeForce GTX 460 SLI needs four 6-pin PEG connectors.GeForce GTX 460 needs two 6-pin PEG connectors.Once the card is installed and seated into the PC we connect the two 6-pin PEG power connectors to the graphics card. Preferably your power supply is compatible, most PSUs after 2008 have these connectors as standard: Installation of any of the GeForce GTX 460 cards is really easy.