FurMark and an overclocked GTX 480: the intensity of the current reaches 108 amperes!
GTX 480 cooled by Thermalright’s SpitFire VGA cooler
Yes 108 amperes! A current of 108 amperes goes through the GPU. But watch out my friends, the GPU we are talking about, is the one behind the GeForce GTX 480. To reach 108A, the GPU is overclocked to 797MHz (the reference clock is 700MHz) with a VDDC (GPU voltage) of around 1.04V (the non-oc VDDC is 1V).
The guys at pcbrain.it have FurMark-ed a GTX 480 with standard clocks and VDDC and with overclocked settings. They have done the test with the stock VGA cooler and with Thermalright’s SpitFire (official page HERE).
FurMark and a GTX 480 with default settings (clocks and VDDC) and stock VGA cooler
FurMark and a GTX 480 with default clocks and VDDC
FurMark and a GTX 480 with overclocked settings (clocks and VDDC) and stock VGA cooler
FurMark and an overclocked GTX 480
These images clearly show the GPU that is throttling back when temperature is too high: the temperature curve does not follow a normal heat progression. This is the overheating protection of the GTX 480.
FurMark and a GTX 480 with overclocked settings (clocks and VDDC) and Sptifire VGA cooler
FurMark and overclocked GTX 480 with a SpitFire VGA cooler (source)
I did a quick test with my EVGA GTX 480 (standard settings + stock VGA cooler) and I got similar results:
As you can see, with a good VGA cooler, an overclocked GTX 480 can resist without problem to FurMark torture stress test.
More than 100 amps for a GPU… These numbers are just impressive. I wonder if the GTX 480 can support such a current during a long period… I hope so!