Does anyone know of a workaround for KVM-AMD's NPT (Nested Page Tables, aka RVI) failure? With NPT on, by default, it maintains CPU performance but drastically cuts GPU performance. With NPT off, it drastically cuts CPU performance but greatly fixes GPU performance. Is there anyway at all I can get have the best of both worlds here? Any information would help. Thanks.

Linux Mint 18.2 - 4.8.0-53
QEMU 2.9.0
ASRock Fatal1ty 990FX Killer
CPU: AMD FX 8750
GPU1: GeForce GTX 660
GPU2: Radeon HD 7950 (Passed to Windows 10 on QEMU guest)