What Like a 260 and a 275 in the same system using SLI? I very much dought it would work.
I always thought that the Cards had to be Identical, but I saw x2 GTX260 for sale on ebay once they were of different brands and one boasted more MHz in some areas but they were advertised as SLi, the guy actually said they were working together..... So to be honest, I wouldnt count on it as the differences are quite imense... But then you could have the smaller one as a physx card... And I dont know If that requires a SLI cable. I think It just does the proccessing and sends it back through the motherboard
If there are x2 GTX260 and one is factory Oc, with slight modification... Prehapse a new Bios version... Would there be any incompatibility, or is it that simple It would just work?... I dont own any 260, Im just curious
What about brands ?
Well the brand doesnt matter , again for example , you can use a XFX card with a EVGA card , or a SAPPHIRE card with a DIAMOND card , just make sure they have the same memory and same clocks.
What will happend if 2 cards have the same amount of memory but one has higher clocks than the other?
One of the best ways to learn is to make examples.
You have a 8800GT(Normal edition,no OverClocks) and you want to add another 8800GT(Which is OverClocked),then:
1_The OverClocked one will lower its clocks to reach the Non-OverClocked card.
2_You can OverClock your card(The one that has Stock frequencies) and reach the OverClocked card.
Remember, you cant ALWAYS OverClock the normal card to reach the other card,because it may not OverClock that much and may become unstable.
WARNING:There are many exceptions in Computer Hardware, for example "Mousemonkey" a member of this forum has told me that when he puts his ASUS 7900GT card (Which is at stock speeds) with a XFX 7900GT(A OverClocked card) the ASUS one raise its clock to reach the XFX one which is an exception and as i said exceptions are alot in Computer Hardware.