Hardware Setup | Power Consumption
Hardware Installation
Installation of any of the Nvidia GeForce cards is really easy. Once the card is seated into the PC make sure you hook up the monitor and of course any external power connectors like 6 and/or 8-pin PEG power connectors. Preferably get yourself a power supply that has these PCIe PEG connectors native (converting them from a Molex Peripheral connector anno 2013 we feel is a no-go).
Once done, we boot into Windows, install the latest drivers and after a reboot all should be working. No further configuration is required or needed unless you like to tweak the settings, for which you can open the NVIDIA control panel.
I just love what ASUS does with the LEDs, if you have ill-connected a power cable or will forget one, a green / red LED will be visible warning you.
Power Consumption
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 GeForce GTX 780 Ti
- System in IDLE = 121W
- System Wattage with GPU in FULL Stress = 375W
- Difference (GPU load) = 254W
- Add average IDLE wattage ~10W
- Subjective obtained GPU power consumption = ~ 263 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.
| Power consumption | TDP in KWh | KWh price | 2 hrs day | 4 hrs day |
| Graphics card measured TDP | 0,263 | 0,23 | 0,12 | 0,24 |
| Cost 5 days per week / 4 hrs day | € 1,21 | |||
| Cost per Month | € 5,24 | |||
| Cost per Year 5 days week / 4 hrs day / € | € 62,91 | |||
| Cost per Year 5 days week / 4 hrs day / $ | $ 83,04 |
Here is Guru3D's power supply recommendation:
- GeForce GTX 780 Ti - On your average system the card requires you to have a 550 Watt power supply unit.
- GeForce GTX 780 Ti 2-way SLI - On your average system the cards require you to have a 800 Watt power supply unit as minimum.
- GeForce GTX 780 Ti 3-way SLI - On your average system the cards require you to have a 1200 Watt power supply unit as minimum.
If you are going to overclock your GPU or processor, then we do recommend you purchase something with some 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 could happen if your PSU can't cope with the load is:
- Bad 3D performance
- Crashing games
- 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.
