Does Vram add when Sli or crossfire

Jan 6, 2015
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I'm planning to build my first pc soon and may Sli my gpu. But do the vram add on to each other.
EX: gtx 760 2gb + gtx 760 2gb= 4gb?

Sorry if this is a noobish question. I only know some things about computers.
 
Solution
Here is a thread on why they can't be added together if you want the reason.

http://www.techpowerup.com/forums/threads/why-cant-crossfire-or-sli-use-the-sum-of-vram-from-all-gpus.167301/