Ok im currently running SLI with 2 Nvidia Geforce GTX's and In an outside environment im getting about 20 fps max this seems sort of low. I do have my setting up high but Ive had these cards for awhile now and i recall getting an average of 19-28 fps outside with the same settings. SLI is enabled and both my cards are updated and seem to be running properly. If anyone can throw me some ideas im would be greatfull. Also disabeling SLI im only noticing a defference of about 2 Fps.

Exactly what model GTX are you running?

Are you running any graphics-enhancing mods?

Sorry 7900 Gtx's
and yes i have a few mods but nothing amazing. and it was running faster previously with those same mods.

previous to what?

Try running just a single card. See if that works better.