Battlefield 1 GPU Usage - DX11 vs DX12

[MrN1ce9uy]

So something weird happened. Yesterday I played BF1 for the first time with my new i7-7700K + GTX 1070 and was quite pleased. Today after doing some overclocking I was playing BF1 again, but this time I noticed less than normal GPU usage. Normally, GPU usage stays at 98-99%. Today it varies between 75-85% and I'm getting somewhat lower framerate. I had video recorded of yesterday's gameplay at 99% GPU usage, and today's gameplay at 85% usage. After returning to stock clocks all settings were the same, but the usage was still lower. The whole time I was playing in DX12.

Finally decided to try DX11, and that fixed it. Now it's back to 98-99% usage all the time. Weird that it was running fine the first time I played on DX12 but then it had lower GPU usage later on.

I guess my question could be why this is? I presume DX12 just isn't optimized in all games for all hardware. But why was it fine one day and not the next?

 

[JUICEhunter]

Some DX12 games tie or exceed their DX11 counterparts but BF1 is not one of those, consistently slower in DX12 with AMD and NVidia. I wouldn't focus too much on DX12 performance variance/usage as it's universally accepted that the DX12 version is a step down for all.

Also BF1 responds really well to a good CPU/GPU OC, it's a game that uses both when needed so you could easily get a 15%-25% increase with the combined OC's.