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GPGPU Power Consumption Results

AMD Radeon R9 285 Review: Tonga and GCN Update 3.0
By , Igor Wallossek

Power Consumption: GPGPU Stress Test

We'll take one step further and push the Gigabyte R9 285 WindForce OC as far as it will go. The resulting 191 W (without changing the power target) are right around where AMD’s TDP said the card would max out. This also shows that the manufacturer’s specifications can generally be trusted, especially since increasing the clock frequency doesn’t change the power draw as long as the other settings are kept the same.

And now lets focus on a perfect minute’s worth of gently smoothed curve.

The measurements at the motherboard slot confirm, once again, that all of the power values we saw fell well within the acceptable range.

Let’s take a look at the individual measurements again in our table.

  Minimum Maximum Average
PCIe 12V
57 W 175 W 140 W 
Motherboard 3.3V3 W 6 W 5 W 
Motherboard 12V19 W 83 W 47 W 
Graphics Card Total87 W 250 W 191 W 

List of All Individual Values per Supply Line

Once again, the following gallery shows all power consumption values for each supply line.

Voltages

The average voltage is 11.9 V. Those fluctuations we saw are making an appearance yet again.

The 191 W torture test result is almost the exact TDP as stated by the manufacturer. In light of the higher computing power requirements of OpenCL and DirectCompute, the Gigabyte R9 285 WindForce OC’s performance yield is higher than that of a comparable Kepler-based GeForce graphics card in places. Still, we’re talking about catching up to the competition from an efficiency perspective, not surpassing it. Tonga will probably have trouble going up against Maxwell.

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  • 1 Hide
    IRONBATMAN , 2 September 2014 15:15
    I'd definitely go for a R9 280 instead, or wait for the higher end Maxwell GPUs to be released.
  • 0 Hide
    TopLuca , 2 September 2014 18:46
    I'd definitely get a R9 280 , Its cheaper and better so why not ?
  • -1 Hide
    Baumy15 , 2 September 2014 23:53
    not to do with the 285 but what cpu do they use for testing this?

    I have a G3258@4.5ghz and a GTX660 and I get better fps than they show there.
  • 0 Hide
    TopLuca , 3 September 2014 21:52
    Quote:
    not to do with the 285 but what cpu do they use for testing this?

    I have a G3258@4.5ghz and a GTX660 and I get better fps than they show there.


    potato :p 
  • 0 Hide
    Baumy15 , 4 September 2014 02:47
    Quote:
    Quote:
    not to do with the 285 but what cpu do they use for testing this?

    I have a G3258@4.5ghz and a GTX660 and I get better fps than they show there.


    potato :p 


    a potato.............really?................the fps should be heaps better than that.
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