We’re enthusiastic to bring in our new innovative 3DMark API Over-head feature test – the world’s very first independent test for assessing differences in DirectX 12, DirectX 11 and also Mantle API overall performance. It’s additionally the first public utility to utilize DirectX 12 full stop. This is ground breaking stuff !

 

Designed with contribution from AMD, Intel, Microsoft, NVIDIA , along with the fellow members of our Benchmark Development Program , the 3DMark API Over-head feature test allows you to evaluate the overall performance of DirectX 12, DirectX 11, and Mantle.

The objective of the test is to examine the comparative performance of various APIs on a single system, instead of the absolute performance of various systems. The API Over-head option test is not a general-purpose GPU benchmark, also it should not be accustomed to examine graphics cards from various vendors. ( We have been planning out a DirectX 12 benchmark with game-like workloads, which we anticipate to emit shortly after the public release of Windows 10. )

Importance Of API Over-head:

There was a lot of chit chat this current year of new graphics APIs that let developers code ‘close to the metal.’ And also though it’s natural to consider the GPU, the advantages of APIs with reduced over-head are in fact attained by generating much better use of multi-core CPUs to streamline code execution and minimize software bottlenecks,especially for draw calls.

A draw call occurs whenever the CPU informs the GPU to draw an item on the screen. Games typically render 1000s of draw calls per frame, however, every one generatesperformance-limiting over-head for the CPU.

Modern APIs such as DirectX 12 and Mantle decrease that over-head permitting more draw calls. With an increase of draw calls, a game engine can draw a lot more objects, textures and effects to the display.

 

Working Of 3DMark API Overhead Feature:

The 3DMark API Over-head feature test assesses API performance by producing a continuously increasing quantity of draw calls. The result of the test is the max number of draw calls per second attained by each and every API before the frame rate declines below 30 fps.

We suggest studying the 3DMark Technical Guide, which contains more detail and clarifies the crucial differences between feature tests and benches.

System requirements:

  • The DirectX 12 test requires a PC running an up-to-date version of Windows 10 Technical Preview (build 10041 or later), 4 GB of system memory, and DirectX feature level 11_0 compatible hardware with at least at least 1 GB of graphics memory.
  • The Mantle test requires 4 GB of system memory and AMD hardware that supports the Mantle API.
  • The DirectX 11 test requires DirectX feature level 11_0 compatible hardware with at least 1 GB of graphics memory and 4 GB of system memory.

Availability:

The API Over-head feature test is available right now in the latest version of 3DMark Advanced Edition and 3DMark Professional Edition. The Steam version of 3DMark updatesroutinely. The stand alone will ask you to download and then install an update. The test simply cannot be run from the totally free 3DMark Basic Edition or perhaps Steam demo.