Graphic card questions

[xpureskills]

Hello there, so I'm a newb looking to drop 3000 on a gaming pc but I have a very limited knowledge. I'm wondering if I can use two different nvidia GeForce GTX cards ( like say a GTX 770 and a GTX 780 Ti).

I'm also wondering if three NVIDIA GeForce GTX 770 2GB GDDR5 16X PCIe 3.0 Video Card (EVGA Superclocked ACX Cooling) would be a better option then one NVIDIA GeForce GTX 780 Ti 3GB GDDR5 PCIe 3.0 x16 Video Card (Major Brand Powered by NVIDIA) or maybe 2
NVIDIA GeForce GTX 770 4GB GDDR5 16X PCIe 3.0 Video Card (EVGA ACX Cooling Edition Powered by NVIDIA)

Which option is the best and what advantages are there in sli?

Would the 3x GTX 770 option be able to handle bf4 at decent rates on high settings ( with a proper motherboard )?

Thanks for the help

 

[purse]

get 2 780 ti's

 

[xpureskills]

2 780 Ti's push my budget by a couple hundred dollars, after hearing all the reviews I am fairly keen to them though. Might just have to save up a couple hundred and go for it

 

[Blubberykollis]

SLI only works if it is the same cards. 780 and 780. 770 and 770 et.c..

SLI works if you use 2 different brands. Ex: Asus GTX 770 and MSI GTX 770. Just make sure they have the same amount of memory.

Advantages in SLI; 2 cards gives you about twice the power. adding a third cards gives slightly less, and the 4th card probably wont make any difference.

You don't need more than 2Gb of Video RAM. Unless you are going to play with 3D vision. Or using a higher resolution than 1080p.

V-ram does not stack.

GTX 770 2gb + GTX 770 2gb does not equal 4Gb of v-ram. the memory will still be the same.