When I run the game in DirectX 9 I get half the frame rate and nasty artifacts... They really should drop the Dx9 support which seems to be the problem to get running well for them. Others like DCS A-10 that run on Dx9 does it great but in this case I feel that they are wasting their resources on that... It may be that there are more people in Russia still on XP so they would loose to much potential customers there?
Anyway, if XP would have gotten Dx10 and 11 I'm pretty sure it would have outperformed Windows 7 with a percent or two in titles that are not heavily multithreaded (which few are). Less HAL and other stability improving stuff is always good for raw performance...
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i7 2600k @ 4.5 | GTX580 1.5GB (latest drivers) | P8Z77-V Pro MB | 8GB DDR3 1600 Mhz | SSD (OS) + Raptor 150 (Games) + 1TB WD (Extra) | X-Fi Fatality Pro (PCI) | Windows 7 x64 | TrackIR 4 | G940 Hotas
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