I am running a Win8.1 guest with GPU passthrough of a GTX 970. The guest has 6 VCPU's from an AMD FX8350.
I have been fighting with occasional audio static, popping and severe frame rate drops. This has been mostly fixed by changing the timer section of my xml from
<clock offset='localtime'>
<timer name='rtc' tickpolicy='catchup'/>
<timer name='pit' tickpolicy='delay'/>
<timer name='hpet' present='yes'/>
<timer name='hypervclock' present='ye
My <clock> section of XML is as follows:
<clock offset='localtime'>
<timer name='hypervclock'/>
<timer name='hpet' present='no'/>
</clock>
Also, are you using latest nVIDIA drivers or 340.52? The 340.52 drivers were the last drivers nVIDIA released that supported the use of hyper-v extensions in the VM. If you use 340.52, you can add this in your <features> section:
<features>
<acpi/>
<apic/>
&