Installation of any GeForce graphics card is really easy. Once the card is installed and seated into the PC, we connect the 6-pin PEG power connector to the graphics card. Preferably your power supply is compatible, most high-end PSUs built after the year 2008 have these connectors as standard.
So preferably the PEG headers should come directly from the power supply and are not converted from 4-pin Molex peripheral connectors. Don't forget to connect your monitor, you can now turn on your PC, boot into Windows, install the latest compatible NVIDIA GeForce Forceware driver and after a reboot all should be working. No further configuration is required or needed.
Let's have a look at how much power draw we measure with this graphics card installed. The methodology: We have a device constantly monitoring the power draw from the PC. We simply stress the GPU, not the processor. The before and after wattage will tell us roughly how much power a graphics card is consuming under load. Our test system is based on a power hungry six-core Intel Core i7-3960X Extreme Edition Sandy Bridge-E based setup on the X79 chipset platform. This setup is overclocked to 4.60 GHz on all cores. Next to that we have energy saving functions disabled for this motherboard and processor (to ensure consistent benchmark results). We'll be calculating the GPU power consumption here, not the total PC power consumption.
Measured power consumption single card
System in IDLE = 120 W
System Wattage with GPU in FULL Stress = 278W
Difference (GPU load) = 158W
Add average IDLE wattage ~10W
Subjective obtained GPU power consumption = ~ 168 Watts
Mind you that the system wattage is measured at the wall socket side and there are other variables like PSU power efficiency. So this is a calculated value, albeit a very good one.
Above, a chart of relative power consumption. Again, the Wattage shown is the card with the GPU(s) stressed 100%, showing only the peak GPU power draw, not the power consumption of the entire PC and not the average gaming power consumption.
Here is Guru3D's power supply recommendation:
GeForce GTX 760 - On your average system the card requires you to have a 550 Watt power supply unit.
GeForce GTX 670 SLI - On your average system the card requires you to have a 700 Watt power supply unit.
If you are going to overclock GPU or processor, then we do recommend you purchase something with a bit more stamina.
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. What would happen if your PSU can't cope with the load:
bad 3D performance
spontaneous reset or imminent shutdown of the PC
freezing during gameplay
PSU overload can cause it to break down
Let's move to the next page where we'll look into GPU heat levels and noise levels coming from this graphics card
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