System specs:

• CPU: i7 5930K
• RAM: 32GB DDR4-2400Mhz
• Motherboard: Asrock X99M Killer
• GPU config 1: 2x Radeon RX 480 @ PCIE 3.0 x16 for each GPU
• GPU config 2: Founders Edition GTX 1080
• OS: Win 10 64bit
• AMD Driver: 16.30-160525n-230356E
• NV Driver: 368.19

In Game Settings for both configs: Crazy Settings | 1080P | 8x MSAA | VSYNC OFF

Ashes Game Version: v1.12.19928

Benchmark results:

2x Radeon RX 480 - 62.5 fps | Single Batch GPU Util: 51% | Med Batch GPU Util: 71.9 | Heavy Batch GPU Util: 92.3% GTX 1080 – 58.7 fps | Single Batch GPU Util: 98.7%| Med Batch GPU Util: 97.9% | Heavy Batch GPU Util: 98.7%

The elephant in the room:

Ashes uses procedural generation based on a randomized seed at launch. The benchmark does look slightly different every time it is run. But that, many have noted, does not fully explain the quality difference people noticed.

At present the GTX 1080 is incorrectly executing the terrain shaders responsible for populating the environment with the appropriate amount of snow. The GTX 1080 is doing less work to render AOTS than it otherwise would if the shader were being run properly. Snow is somewhat flat and boring in color compared to shiny rocks, which gives the illusion that less is being rendered, but this is an incorrect interpretation of how the terrain shaders are functioning in this title.

The content being rendered by the RX 480--the one with greater snow coverage in the side-by-side (the left in these images)--is the correct execution of the terrain shaders.

So, even with fudgy image quality on the GTX 1080 that could improve their performance a few percent, dual RX 480 still came out ahead.

As a parting note, I will mention we ran this test 10x prior to going on-stage to confirm the performance delta was accurate. Moving up to 1440p at the same settings maintains the same performance delta within +/-1%.

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여기서 핵심은

크레이지 옵션에 1080p 로 했을때 결과가 더 좋았다는 점과,

1440p 로 벤치했을때 +-1% 이내에 성능을 가진다는 점이죠.

거기다가....크로스 파이어는 아직 최적화가 덜 된 상태구요.

신뢰성이 높아지는 자료가 많이 나오니 더 즐겁네요.