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DirectX 12 uses up to 50% less CPU power consumption, more performance

DirectX 12 teased at SIGGRAPH 2014, where Intel was showing off 50% CPU power usage reduction, as well as increased performance

By Anthony Garreffa on Aug 13, 2014 at 04:22 am CDT - 1 min, 26 secs reading time

There's not much reason to be excited over DirectX 12 just yet, but Intel was showing off the performance and power benefits of DirectX 12 at SIGGRAPH 2014. Microsoft used its Surface Pro 2 with Intel HD4400 graphics, showing off some impressive performance improvements, with heavily refuced CPU power consumption.

DirectX 12 uses up to 50% less CPU power consumption, more performance |

Intel had a demo that was rendering an asteroid field with 50,000 unique asteroids, each equating to 50,000 draws per frame. Each asteroid then had a unique combination of vertices, textures, and constants. Intel's demo was able to switch between DirectX 11 and DirectX 12 with a single key press, but it could also lock the frame rate in order to keep the workload on the GPU at a constant level.

The company was showing people the benefits of DX12, with massive power gains being unlocked from Microsoft's new API. Intel locked the frame rate of the demo, rendering it for a period of time on DirectX 11, and then switching over to DirectX 12. As you see in the graph above, the CPU power consumption was reduced by over 50% when DX12 was enabled, highlighting the fact that DX12-enabled games could offer some serious reductions in power consumption on our devices.

Another question Intel had, was can lowered CPU power consumption provide increased performance? The answer is yes, yes it can. Intel not only reduced the CPU power consumption, which leads to a device generating less heat, with longer battery lives on portable devices, but it allows the GPU side of things to crank up, running faster and hotter instead - providing more performance. Intel was demonstrating that by unlocking the frame rate cap on their demo, there was a 50% increase in the frame rate switching from DX11 to DX12, without drawing any extra power.

Anthony Garreffa

ABOUT THE AUTHOR - Anthony Garreffa

Anthony is a long time PC enthusiast with a passion of hate for games to be built around consoles. With FPS gaming since the pre-Quake days, where you were insulted if you used a mouse to aim, he has been addicted to gaming and hardware ever since. Working in IT retail for 10 years gave him great experience with high-end, custom-built PCs. His addiction to GPU technology is unwavering, and with next-gen NVIDIA GPUs about to launch alongside 4K 144Hz HDR G-Sync gaming monitors and BFGDs (65-inch 4K 120Hz HDR G-Sync TVs) there has never been a time to be more excited about technology.


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