Quote:
Originally Posted by Warner306
Try going back to DXVA2 copy-back. Does it get any better? If so, forget about D3D11 as it's unnecessary and native mode doesn't work for you.
There may be a bottleneck with your GPU (only 8 lanes) combined with a lack of PCIe express bandwidth (v2.0 or lower) in copy-back mode. I've run into one other user with this problem. I don't know how he installed his graphics card. He may have installed it in a x4 slot. Native and copy-back shouldn't have radically different performance.
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Thanks. I’m back to DXVA2 copy-back, works flawlessly.
My GTX 1080 is plugged in a very old motherboard (X58 chipset, PCIe 2.0) so it makes sense. MB upgrade is scheduled but not a priority ATM.