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Power Consumption

Just as we had done with the overclocked Radeon HD 3870, we measured the power consumption of the modified GeForce 9800 GTX on a special testbed configured like follows:

  • AMD Athlon 64 FX-55 CPU (2.6GHz)
  • EPoX EP9-NPA+ SLI mainboard (Nvidia nForce4 SLI)
  • PC3200 (2x512MB, 200MHz)
  • Western Digital Raptor WD360ADFD HDD (36GB, SATA-150, 16MB buffer)
  • Chieftec ATX-410-212 PSU (410W)
  • Microsoft Windows Vista Ultimate 32-bit
  • Futuremark PCMark05 Build 1.2.0
  • Futuremark 3DMark06 Build 1.1.0

The 3D load was created by means of the first SM3.0/HDR test from 3DMark06 running in a loop at 1600x1200 with 4x FSAA and 16x AF. Practice suggests it is a heavier load for the graphics card than the tests of 3DMark Vantage. The Peak 2D mode was emulated by means of the 2D Transparent Windows test from PCMark05. Here are the results:

Click to enlarge

So, the peak power consumption grew by almost 70% under load reaching 182.6W. This is similar to the power draw of the dual-processor GeForce 9800 GX2 and higher than that of the GeForce GTX 280! ATI’s new solutions require much less in comparison. Thanks to the two 6-pin PCI Express 1.0 connectors, the load on each +12V line was always acceptable, never exceeding the permissible limit of 75 watts.

Now we will check out if such extreme methods can help the GeForce 9800 GTX beat the Radeon HD 4850 and 4870 in games.

 
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