HL2 and nVidia FX performance

Hello,

does anyone know any site that has actually compared nVidia FX cards
with some preview version of HL2? I know there was a Doom III review (I
recently posted the link), but is there a review of HL2?

I just downloaded steam from valve and I could get 4 preview movies of
HL2 and I was impressed by the last one: Trapdown. The way you can
interact with the environment is awsome I have always hated that in
maximum case you could shoot a monitor and see it brake, but to move
around tables and use barrels to dodge bullets and throw someone with a
rediator ... that's something cool

Mario