very hard is passthroug GPU ... i was testing few grafic cards (AMD, NVidia) - VMware Esix 5.0-5.5
i try run Openelec virtual build with grafic driver AMD, NVIDIA and there are many issue include problem with sound which you cannot redirect,
or glitching
Im also try on Windows there is better effect but still for me this is to much unstable.
Just read forums about passthroug GPU maybe only few person successful run this example for gaming.
For more simple task like for mining some crypto-coins when you dont need sound or picture on TV, is more easy.
For me solution with passthroug GPU need 2years + before this will be work like should be and will be more compaible with
vendors of mb, gpu etc.