Originally Posted by FastRedPonyCar
While they're not night and day different, the GTS vs GTX/Ultra are finally showing some differences and benefits to the higher onboard memory count as raising the resolution jacks up video memory usage tremendously. One guy that wrote the incrysis.com tweak guide said he was EASILY able to suck down a gig of video memory usage only at 1280X1024 resolution.
I think hardocp make a good point that the 8800 series is more power-limited than memory w/ crysis. To play it at what's considered "playable" settings, you're not gonna run into memory limitations anyways because those playable settings are probably low enough not to need more than 320 or so mb (this is the case between the 2 GTSs anyways).