Right, we installed the cards so let's have a look at how much power draw we measure with these graphics cards active and running.
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 default test system is based on a power hungry Core i7 3960X/ X79 system. This setup is overclocked to 4.6 GHz (core 1.40V). Next to that we have energy saving functions disabled for this motherboard and processor (to ensure consistent benchmark results). On average we are using a bit more than a standard PC due to higher CPU clock settings, water-cooling, additional cold cathode lights etc. We'll be calculating the GPU power consumption here, not the total PC power consumption.
GPU STRESS TEST
GeForce GTX 760
GeForce GTX 760 2-way SLI
Mind you, 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 760 2x SLI - On your average system the cards require you to have a 700~800 Watt power supply unit as minimum.
GeForce GTX 760 3x SLI - On your average system the cards require you to have a 1000~1200 Watt power supply unit as minimum.
Though we do have some reserves calculated into our recommendation remember this; if you are going to overclock the GPUs or processor, then we do advise you purchase something with some more stamina. The minute you touch voltages on the CPU or GPUs, the power draw can rise real fast and extensively. 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. Let's move to the next page where we'll look into GPU heat levels and noise levels coming from this graphics card
ASUS GeForce GTX 780 Ti Matrix review We review the ASUS GeForce GTX 780 Ti MATRIX Platinum edition. The all customized and LN2 ready product has already been overclocked to 1006 MHz for you, with a boost allowance to 1072 MHz. That makes this a t...
ASUS GeForce GTX 780 Ti DirectCU II OC review We review the ASUS GeForce GTX 780 Ti DirectCU II OC edition. Customized GeForce GTX 780 Ti graphics cards are a hot thing these days, as they are silent, running cool and offer tremendous rendering ...
Gigabyte GeForce GTX 750 Ti WindForce review In this review we take the Gigabyte GeForce GTX 750 Ti WindForce for a spin. The card is obviously based on NVIDIAs MAxwell based GTX 750 Ti GPU. Gigabyte designed their own PCB, tweaked the card a h...
Palit GeForce GTX 750 Ti StormX Dual review In this review we take the Palit GeForce GTX 750 Ti StormX Dual for a test-drive. Palit's offering is the fastest GTX 750 Ti we have seen to date as it has been factory overclocked intensely on the G...