Sadly i still don't know what this means.
Basically any discrete video card you can buy now will support DX9 and pixel shader 2.0. Hell, I think all of them should support pixel shader 3.0. The last line of cards that didn't support pixel shader 3.0 were the x800 series from ATI.
OT: My computer can't handle this game . Come on Valve, give me a PS3 port!