NVIDIA GeForce GTX 1080 On Linux: OpenGL, OpenCL, Vulkan Performance

Next up are the power consumption / performance-per-Watt numbers, this is where my jaw was dropping even more! With having the WattsUp Pro USB power meter attached, it was simply a matter of setting the MONITOR=sys.power PERFORMANCE_PER_WATT=1 environment variables for having the Phoronix Test Suite systematically log the power usage in real-time during the testing process and to collect it on a per-test basis for also generating performance-per-Watt metrics. Let's look at those numbers.

The performance-per-Watt of the GTX 1080 was better by more than 40% compared to the top-end Maxwell cards.

When testing OpenCL with LuxMark, the GTX 1080 had a performance-per-Watt advantage of 20% greater than the best Maxwell hardware.

When running a simple Dota 2 OpenGL test at 1080p where things were intentionally CPU bound, the GeForce GTX 1080 delivered 21% greater performance-per-Watt than the next most efficient card (GTX 950) in this CPU bound test.