Call of Duty

A substantial performance hit can be observed in Windows Vista: in high resolutions the powerful Radeon X1900 XTX delivers just a little higher frame rate in the new OS than the Radeon X1900 GT does in Windows XP. It’s possible to play Call of Duty 2 in Windows XP using full-screen antialiasing and anisotropic filtering, but that’s impossible in Vista even in 1280x1024 – the average frame rate is lower than 50fps.

Tomb Raider: Legend

We see performance sink here just as it did in the previous cases. The game is very demanding, so you can’t use it under Windows Vista with full-screen antialiasing even on a Radeon X1900 XTX. The Radeon X1900 GT slows down less for some reason. It may be due to some specifics of the Desktop Window Manager, but we can’t yet give you a precise explanation.

Age of Empires 3

Age of Empires 3 runs more slowly under Microsoft Windows Vista Beta 2 than under Windows XP. So, even with such a powerful graphics card as Radeon X1900 XTX, you cannot play in 1920x1200 and have just a bare minimum of comport in 1600x1200.