[Jammer]

The difference between DX10 and DX9 is abysmal on my box:

DirectX 9.0c ENTHUSIAST 3X @ Map: airfield flythrough @ 8 1680 x 1050 AA 0x
==> Framerate [ Min: 15.58 Max: 33.87 Avg: 26.37 ]

DirectX 10 ENTHUSIAST 3X @ Map: airfield flythrough @ 8 1680 x 1050 AA 0x
==> Framerate [ Min: 9.28 Max: 23.19 Avg: 19.05 ]

That's the difference between playable and stuttering mess... same thing w/ the original Crysis (extreme dx9 vs. very high dx10) and Stalker CS. I'm beginning to think HybridPower may be partly responsible...

Edit: Not sure why my sig ain't showin' up, here are my specs:
Phenom X4 9850@2.8G / Asus M3N-HT Deluxe/HDMI / XFX 9800GTX+ / 4GB G.Skill @ Cas4 / Vista64