How Critical is GPU Support in Post Capture Work?
 

My HP Win 7, Core i7, 8GB RAM PC (for post capture processing) has an AMD Radeon 5450 graphics card. In the past when using Sony Movie Studio, the option for GPU assisted processing (CUDA, I believe) could not be used, as my card does not support it.

I take it that would also be the case for the other programs often mentioned here for filtering, editing and encoding?

Should I be looking for another graphics card?

GPU almost never matters.

The only GPU-assist filter that I use is KNLmeansCL in Avisynth, and even then I'm just using the onboard Intel graphics with i7-6700K on Asrock Extreme 7+ board. Nothing fancy. Speeds are good. CPU encoding with that filter is unusably slow.

The are some other GPU encoding/filters out there, but nothing I use. Probably nothing you'll use. At least in 2019.