NVIDIA A10 Gaming Performance

Sorry for my poor english. We are evaluating the A10 for cloud gaming.For Same Unreal Engine game, average frame rate can maintained at 20-30 on a GTX 1080 test workstation, at 60-70 on a RTX 3090 workstation, but only 20 on a A10 virtual machine.Is there something wrong with the configuration? We have installed GRID Driver and configured with a RTX virtual Workstation lincense.