Quote:
Originally Posted by Blackdog_kt
Sorry to be the bearer of bad news, but SLI doesn't increase your available video RAM.
I'm not exactly sure why, but i think that if cards use split frame rendering they render half of each frame, but they need to store the entire frame in each card's memory.
When they render alternate frames (eg, card 1 renders frame 250 and card 2 renders frame 251) the same holds, because each card has its RAM filled with an entire frame.
You do have double the video RAM but you also use double, so there is no gain in available memory.
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So let me make sure I have this straight. Nvidia wasted $$ putting an extra 1.5 GB of DDR5 on my 590 in full knowledge that it would never be used ?? Now they did it again with the 690 throwing away 2GB of VRAM because SLI can never use the VRAM from both cards. Those silly guys. Thanks for the tip.