I am not in a position to test on a Windows machine with an NVIDIA card at the moment, so below is from memory.
I *think* cinebench can test GPU memory, but I see that it is some type of subscription now. Most apps only test system memory and not the GPU memory.
There are the NVIDIA tools, but I can only find Linux versions and not Windows versions.
And there is the NVIDIA Field Diagnostics, but you would need to log a fault with NVIDIA and I am not sure that you qualify as it is a laptop, not a GPU card.
Was there something from DirectX Diagnostics (dxdiag.exe)?
Maybe someone here can confirm.
Sorry, I can't be of more help.
