NVIDIA Quad-SLI with the ASUS EN9800GX2

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Total System Power Consumption

Before we bring this article to a close, we'd like to cover a few final data points. Throughout all of our benchmarking and testing, we monitored how much power our test systems were consuming using a power meter. Our goal was to give you all an idea as to how much power each configuration used while idling and under a heavy workload. Please keep in mind that we were testing total system power consumption at the outlet here, not just the power being drawn by the motherboards alone.

Total System Power Consumption
Tested at the Outlet

Looking at these power consumption numbers, one thing is clear - if you're going to slap three or four GPUs into a single system, its going to sap some serious power.  The dual ASUS EN9800GX2 powered quad-SLI rig consumed over 300 watts while idling at the Windows desktop (with Aero enabled) and over 550 watts when running with a full 3D rendering workload, which is about 40 and 135 more watts, respectively, than the GeFroce 8800 GTS 512 SLI configuration while idling and under load.  Quad-SLI's power profile doesn't look so daunting next to CrossFireX, however.  The Radeon-powered CrossFireX configurations consumed less power while idling, but under load the three GPU configurations consumption shot up to 511 watts, and the four GPU configuration to 648 watts.

Tags:  Nvidia, Asus, sli, X2, 980, N9, id

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