Graphic Tweak

For me the best thing to do i think to tweak the graphics (as i couldnt play it on my machine on the highest setting) is turn the Quality setting to Low and Set The Advanced settings to all High and Vsync On. It looks exactly the same as it does normally with maybe a few more "jaggies"
Also I dunno bout anyone else but my surround sound for Doom has a funny buzzing sound in the background and it aint on my end but anyhoo if u get same thing what to do is just turn it from surround to not. I know your not getting your full spec sounds but it also increases performance and if you have same prob as me it takes it away.

If anyone knows how to sort Sound Buzz thats be kool :D