manofchalk :
Guys, keep it civil here.
If you have two 4GB cards, you will have an effective 4GB of VRAM to use.
Whether you will ever benefit from having that much on a 760 is doubtful, and I would say its the GPU that will be the limiting factor before the Memory Bus. Whether it can take advantage of having more than the stock 2GB, that's a bit more plausible. Games are starting to use more than 2GB at 1080p, mainly your high end ones like Crysis 3 when you max out settings, but it wont be any great bottleneck for a fair while IMO.
What I would do, for the ~$300 it costs for a 4GB 760, get yourself a cheap HD7970 that comes with 3GB of VRAM and a bunch of games in the new Never Settle deal.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814202008
Fan boy? Kahn, but I've ALWAYS gone invidia in the past with no exceptions. Building a new rig in the next month though, this is exactly what I've been contemplating. A less expensive AMD CPU MB combo and pairing two higher end AMD 7 series cards (78, 79 series) getting the 3 GB of soon to be needed vram (multiple monitors) while taking four brand new 50-60 dollar games along with it (AMD's free game offer with 7 series cards). If you want to pair two 79's, then your taking six free games.. Dude, that's like a $300 value, although, I can only see four games available which I'd be interested in owning. But that's cool, because x fire with dual 78 series cards with an extra GB of vram is not a bad move, it's pretty solid. Just comes down to driver support..
Strongly considering this over a single 760 4 GB, then upgrade to sli 2-3 years down the road. 4GB or 3GB vram? My builds last about 5 years so the vram matters to me..