GPU performance loss

[delivereath]

Hi,

 

After having failed to setup passthrough with a GTX 970 and a GTX 1060, I've been finally able to have it working using a GTX 1660 Ti !

 

I was expecting some performance loss, but I don't know if the numbers I get are good or if there is something to improve.

 

The average 1660 Ti 3d result of passmark tests are around 11500 points. I reach around 9500 points, almost 20% less. Is this the range of performance loss that we get with virtualized gaming ? I'm using an i5-8400 (passing 5 of 6 cores to the VM) with 8 GB of ram.

 

Thanks !

Edited January 17, 2020 by delivereath

[headnail]

Have you isolated the cores assigned to the VM? (i.e. nothing else can use them)

What PCI-X slot is the card in? (i.e. verify that it's running in 16x mode)

 

I'm running a Win10 VM with a GTX 970 and performance has suffered in 3D games due to the PCI-X slot in use (16x but wired 4x).

[zeus83]

Hi,

 

I'm running RTX 2060 Super and in 3DMark Time Spy the GPU performance tests is no difference to bare metal (default settings). Altough there is a CPU test as well and it's there where is a loss, and it depends on you VM configuration (how many cores you're passing and etc.) . 

 

Games normally got more performance downgrade because they're more depend on CPU & memory subsystems, but pure graphic benchmarks are mostly showing a bare metal performance.