I just purchased portal and its asked me to update my drivers for my Nvidia 7300 GeForce...so i did because its been since i bought the card that i did the upgrades...and i run portal for the first time after downloading and installing the new drivers...its slow as all hell...pretty choppy and semi-unresponsive controls... Now, ive compared my settings to Half-Life2's settings...like, anti aliasing, color correction...all that. and theyre both set the same. however with my new graphics card drivers, hl2 runs fine and dandy like it always did...and portal with the same graphics drivers and settings as hl2, does not. so what am i doing wrong? is there some kind of setting that im not seeing? let me know if you guys need more information. thanks in advance fellas.