u/Master-Corgi-8535

I realize this is not a standard edition code, but a print I’m looking at has “fu” next to the edition number (see https://www.artsy.net/artwork/victor-vasarely-composition-silver-3 ). Does anyone have any idea on what this means?

I've got a 10-ish year old PC (Core i5-6500, GTX 1060, 16G RAM, 520W PSU) that still works fine for basic things. I'm wondering if there's a GPU that I could swap in that would let it run something like MS Flight Sim (2020, not 2024) at decent quality? Or should I just build another PC? Thanks for your thoughts.