SLI; same card, different VRAM?

[raybob95]

Can you SLI an 896MB GTX 275 Superclocked (648 MHz Stock) with a 1792MB GTX 275 (633 MHz Stock), both from EVGA?

 

[Timop]

Not always, you cant SLI a 512MB GTS250 with an 1024MB GTS250 for example.
Even if it does work, the 1792MB card scales back to 896MB.