Input Lag?

[D1shes]

When I load up Fallout New Vegas, no matter where I am in the game, or what I'm doing, new game or a previous save I have this issue with constant input lag. There's slight screen tearing/frame skips but I can live with that. Its the input lag, that puts all my actions at least half a second behind what I do that's halting me.

 

As far as I'm aware, I've always had this issue with FO:NV, but my system should be able to run the game without any issues. I can play Skyrim at max settings with texture mods at nearly 60FPS with no input lag, along with every other game in my steam library, but for some reason when I run Fallout I have this issue..

 

I'm only running 4 mod's (because I'm scared to run any more and have more issues) and its only for face texture replacing, body texture replacing, a UI replace, and a weapon addition. In the past I have tried to add Race mod's, but they always seemed to crash me to desktop before my game would start, so I've avoided that. I've verified the integrity of my game Cache, and tried to disable all mods, reduced all graphic effects to their lowest level, and I even tried yelling at my screen for five minutes until my throat hurt so I started to throw peanuts at it. Nothing seems to fix my issue. I searched google a little about this and saw quite a few people are having a similar issue, but on initial scan of a few forums I didn't see any answers that fixed it. If you think I should backup my savefiles, and then do a fresh install I'll do it, but I hope that to be a last resort kind of thing..

 

I'm using an nVidia GeForce GTX 570 GPU, an AMD FX-8120 Eight Core Processor, have 12gigs of Ram, running Windows 7 64bit OS.

 

Thanks for looking over my post and if you think you could help I really appreciate it