roblox player

I've had this issue for 2 years already thinking it will go away by itself. but no. I've been trying everything but nothing really worked. I tried getting a fps-unlocker which even worked in certain games, But most big and good games wont work. I noticed it's a problem with the GPU usage...

i am planning to add more ram to my computer so if two rams have same frequency(both 1866 Mhz) latency(both C9) and voltage(both 1.5V)can i use them together??i am talking about these two(i have the second one)-----...