Games going very slow

I've been having some major FPS issues in a few games. They mostly start out fine but when I get to certain areas it drops FPS by a lot.

My Specs
http://i44.tinypic.com/2rhs17o.jpg
http://i41.tinypic.com/9vl6jn.jpg
http://i39.tinypic.com/1zlro91.jpg
http://i42.tinypic.com/30mr52g.jpg
http://i42.tinypic.com/2guwjkp.jpg
http://i39.tinypic.com/2n245kk.jpg

Full Detail:
http://pastebin.com/1YtGVJrY


The games I've tested are:
Twilight Princess (Wii NTSC)
Xenoblade (Wii NTSC)
Last Story (Wii NTSC)
Dragon Ball z BT3 (perfect)

Twilight princess seems to be more less of a issue then the other two. In TP, everything is nice and smooth up intill I reach Ordon Village. From there it drops to around 25 FPS. TP works best for me using OpenGL as backend. The other two have no chance of running OpenGL as backend for whatever reason. Xenoblade (DX11) seems all fine up intill the tutorial battle. Last story(DX11) happens right at the starting and cant get any good FPS.

I've tried almost all combinations of settings to get the games working better. None seem to really improve the slow down issues. I've checked the wiki for said games and doing the fixes/gfx enhance don't seem to improve speed. I really don't know how to solve this as this is a new computer. Any help would be wonderful.