i have the same GPU a quad core 3.8ghz I7 Processsor and 32gb of ram. I can run Max settings vanilla 80-90 fps and about 50 fps on high with LSPDFR and about 15 addons but there is alot of game lag not FPS lag. The difference is game lag its the game lagging vs my hardware not being able to handle it. the game is just not built to handle this kind of heavy modifications