I use the aforementioned CPU in my laptop. I recently upgraded to 16GB, knowing that it would allow me to run more qubes at once but that it may or may not increase system performance in general and make it snappier (it does not). I will test Qubes on a more powerful machine that I have to see if Qubes runs faster on a faster CPU, which I suspect that it will, but I just wonder if Qubes itself is slow no matter the CPU. For example, it takes about 20 seconds for my offline vault, which is 103MiB, from the moment I start it to the moment KeepassXC opens. If I’m going to be using Qubes as my daily driver, that’s not acceptable.
I tested youtube and local videos and the performance is absolutely awful. Youtube videos have low frame rates, even lower frame rates in full screen, and local videos stutter horribly. 4k videos are practically unplayable.
As I mentioned, I will test the performance on my more powerful PC, but I doubt it will make a huge difference. On an optimal system, I would expect Qubes to start up VMs within 5 seconds, and local/youtube videos to play flawlessly at max frame rates. P.S. I use the default video app for videos but used VLC as well, no difference.