do I need more ram?

[kyousuke]

Right, now then try to check:
disable ubo
enable dynamic shader generation

if that still doesn't help, try also to check
enable vao and decoding indexed

do note that some option may slow down your game, just uncheck it if it's so, there's no way to be sure for each game and gpu/driver.

Only with UBO disabled the performance is a little better, at some point it reached 22 fps, the rest didn't change anything and when I checked decoding of indexed textures, the fps turned really bad like 7-10 max.