I currently have an 'old series' 8800 GTS 320Mb card which is falling behind on performance now I've moved onto a dual 1440x900 system, so I'm considering upgrading my card. Now, ATi cards currently seem to have the best bang for buck (I can get a HD4870 1Gb for < £200) so that would probably be my route, but my motherboard has two PCI-E slots so rather than 'wasting' a card I would rather run my auxiliary screen off my old GTS and my main screen (the one that plays my games, etc) off my HD4870 (if I get one). Is this possible? Can I run two cards, requiring two separate drivers, independently within the same system? I currently use XP x86, but due to memory limitation I'm considering upgrading to Vista x64, would this help at all? Cheers.
You will propably run into driver conflicts. IIRC, at least a few years back, it was that the Nvidia drivers tried to take over. So you propably don't want to put it as a secondary card.
I believe you can on xp, but not on vista. I saw someone had a hd4870 running and a second nvidia card for Physx and such, but they could only do it on xp. Edit: had a look and it looks like you can do vista aswell but only on the 32bit version Found some info here http://forums.techpowerup.com/showthread.php?t=69658