Didn't affect me.
Tested with Win10 Build 19045, Firefox 109.0.1
Youtube/VLC to Equalizer APO to generic drivers to external USB DAC.
[edit] Don't have linux machine with audio.
After some experimentation, I believe I have pinpointed the cause of the issue. By default, the Nvidia drivers use TCC mode instead of WDDM mode. If I change the mode using nvidia-smi.exe -i 0 -dm 0 to WDDM, GPU-Z displays the correct memory usage as expected.
With WDDM:
With TCC:
I second this issue, however I am running a tesla M40 12 GB with an RX480 for display output. SMI reports correct memory usage, however gpu-z 2.38 reports 11519 MB of VRAM usage from startup. The M40 is not recognized by task manager, CPUID HWMonitor, or CPU-Z and afterburner displays 11520 MB...