How do you rate your PC's processing speed for Blackmagic RAW?
I think you should use "Blackmagic RAW Speed Test". Although it is a PC evaluation for Blackmagic RAW, I think it can also be used as a GPU evaluation for DaVinci Resolve.
It can be downloaded from the following site.
Enter the required items and download.
Unzip and run the file to set it up.
For Windows Run "Blackmagic RAW Speed Test" from the start menu.
Press START to start measurement.