Out of curiosity I was wondering if a 7900GS and 7900GT could be run in SLI together? They are both G71 cored, can SLI do the disable pipeline thing for its cards like crossfire does when you use an X1900GT and X1900 Crossfire together? I don't mind getting into hacked drivers or a bit of BIOS fiddling on the cards. I have to used hacked drivers to even attempt it anyway.
you could, rebuild a bios on the GT so it has 20 pipes then its matched to the GS. then flash both drives with the same modified bios, that would work.
My friends spare 7900GT is completely dead, not just having monitor out issues, so I can't use it in SLI anyway, but thanks for the info, I was thinking the GT -> GS mod would work, but I won't be able to find out now.
We hacked a 7300 GT DDR3 to work with a 7600 GT in SLI (they're based on the same G73 core) in the office last year while we were having one of those days where we were making things up to do with our time (doesn't happen very often, I must admit). Inside Rivatuner, there is a function called NVStrap, which (amongst other things) allows you to modify a card's deviceID. For example, if you've got a 7900 GT and a 7900 GS (which are based on the same G71 core), you can get the deviceID from the 7900 GT and force the 7900 GS to use that deviceID via NVStrap. However, because of the way NVStrap works, you can only change the deviceID on the card in your primary PCI-Express slot. Once you've forced the deviceID to the same as your 7900 GT's, you should be able to turn SLI on in your driver control panel. Performance won't be quite as high as it would be with a pair of 7900 GTs, but it should be higher than two 7900 GSs. GPU load balancing works pretty well in this situation. If you need more detail than this, lmk.
