2 GTX 470s is impossible for me to buy
Anyway, why don't you sell the GTS 250s and buy GTX 470?

Not so easy to sell them.

Back on topic now plz.

Ok, so I want to ask something, what is Catalyst? I thought it's like PhysX or something.

I believe its just like nvidia control panel.

Correct me if I'm wrong, I don't have an ATI.

My sister has ATi, but she don't know what she's playing, so she only play minigames and The Sims 3 :/
Anyway, what game that support PhysX? I'm too lazy to check.

http://www.nzone.com/object/nzone_physxgames_home.html you can search for physx games there

The phys-x support for mirrors edge was pretty lame. All it added was wiggling to the flags and banners and stuff.

lame lol, cloth physx in mirrors edge seems pretty pointless XD. almost like the physx support in ghost recon advanced warfighter 2. all it did was add more particles to gunshots on metal objects and such. really though the progress with physx in gaming since then has been quite a bit. although as previously stated it's not really worth buying a videocard over but it is a really nice feature to have on a graphics card for games that do support it

i love nvidia i own a geforce 9800gt and have had not one issue with it.
their new technologies are amazing. theyve just released their 3d desktops
just buy the glasses and a 3d monitor and of cource a card that can handle the graphics. awesome. as for the ati iv only owned one andit sucked. even my nvidia ge force 6200 is still pretty good even if its outdated now.

hmmm i must say ATI. they are cheaper and run the games with better quallity and smoother.