Heh... I only have one decent monitor though, without filling my desk with hulking great 22" CRTs.
Windows doesnt like both cards at once as the 8800 series has its own drivers that refuse to co-exist with the 7900GT drivers. Plus, with the two of them in so much memory address space is mapped that Win x86 only sees 2.6GB. Although I am running x64 now so I may have a play...
Anyway, Ubuntu installed with the 7900GT in place, I had a few issues though...
Firstly, it insisted on using the wrong ethernet connction for web access. Even disabling the offending adaptor (that only links to my neighbours router so that he can access my storage drive) and manually setting up the other (I have a /29 IP block so no NAT is involved), it still insisted on trying to connect to computers in the 10.0.0.XX range whenever I tried to do a DNS lookup, ping, etc.... I solved this by disconnecting the unwanted LAN cable and rebooting.
However I still could not connect to websites with Firefox (it would just say "connecting"). Ping worked, and I could traceroute to tomshardware.com, but no sites (even google.com) would open. The mail client did the same.
I figured maybe I needed new LAN drivers, and popped in my P5W DH CD in the hopes that it had Linux drivers on... it did!
They were gzipped, so I looked for somewhere on the hdd to unzip them... seems I dont have write access many places, I suppose thats because I'm not logged in as root... finally found somewhere.
The readme.txt tells me I have to run "install.sh" now... open a console, have fun trying to navigate to the relevent directory (I vaguely remember using Slackware 2.0 on a 486 for like a few hours years ago, so I have a vague idea of commands. Take about 10 mins trying to remember the Linux equivalent of "dir", have a vague recollection of "list" or "lst", but to no avil. Turns our "dir" works. Silly me....). Try to run install.sh...
"Access Denied".... This is worse than Vista UAC!
Decide to try to log in as root, but it seems Ubuntu didnt ask me to set a password for root, and its not blank or the same as my other password. Finally figure out that I have to set the permissions on the file under my normal login to allow it to be run.
Finally get to running the file. It errors. I give up.
Back to Win XP for now