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Guru3D.com » Review » Nvidia GeForce GTX 750 and 750 Ti review » Page 5

Nvidia GeForce GTX 750 and 750 Ti review - Graphics card power consumption and Hardware installation

by Hilbert Hagedoorn on: 02/18/2014 03:53 PM [ 5 comment(s) 4 ]

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Hardware Installation

Installation of any GeForce graphics card is really easy. Once the card is installed and seated into the PC, we connect the 6/8-pin PEG power connectors 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. 

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 GTX 750 card

  1. System in IDLE = 120 W
  2. System Wattage with GPU in FULL Stress = 186W
  3. Difference (GPU load) = 66W
  4. Add average IDLE wattage ~10W
  5. Subjective obtained GPU power consumption = ~ 76 Watts
Power consumption  TDP in KWh KWh price 2 hrs day 4 hrs day
Graphics card measured TDP 0,076 0,23 0,03 0,07
         
Cost 5 days per week / 4 hrs day € 0,35      
Cost per Month € 1,51      
Cost per Year 5 days week / 4 hrs day / € € 18,18      
Cost per Year 5 days week / 4 hrs day / $ $ 24,00      

 

Measured power consumption GTX 750 Ti card

  1. System in IDLE = 120 W
  2. System Wattage with GPU in FULL Stress = 202W
  3. Difference (GPU load) = 82W
  4. Add average IDLE wattage ~10W
  5. Subjective obtained GPU power consumption = ~92 Watts
Power consumption  TDP in KWh KWh price 2 hrs day 4 hrs day
Graphics card measured TDP 0,092 0,23 0,04 0,08
         
Cost 5 days per week / 4 hrs day € 0,42      
Cost per Month € 1,83      
Cost per Year 5 days week / 4 hrs day / € € 22,01      
Cost per Year 5 days week / 4 hrs day / $ $ 29,05      

Bear in mind 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 750 - On your average system the card requires you to have a 450 Watt power supply unit.
  • GeForce GTX 750 Ti - On your average system the card requires you to have a 450 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
  • 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.





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