If I have to 1gb cards in crossfire or SLI, is that essentially the same memory wise as having a 2gb single card? Just talking about the memory here, do the 2x 1gb cards function the same with their combined 2gb memory as a single card with 2gb memory?
More aboutcrossfire memory work
No. 1GB of VRAM for both cards still means 1GB of VRAM in total because the same textures are loaded to both cards.