17.3" SGI 1600SW TFT-LCD (1600x1024 Res, .23mm Dot Pitch, 40ms)
That .23mm Dot pitch is your bottleneck .
You mention the freaking response time of your screen but you dont mention your cooling system? No q for u
That and the response time. 40 ms? DAAAMMMNN.
Yea, I was thinkin' it was his monitor that needs an OC tweak.