Does 2 x 3GB = 1 x 6GB Vram ?

[drex69]

I know this sounds a bit like an obvious question,but I just want to make sure.

I have a 30" monitor (2560x1600) and was wondering if games would utilize
the 3GB vram on 2 x graphics card (In SLI), the same as they would do, on 1 x 6GB graphics card ?

 

[almighty15]

No it doesn't, you still only have 3Gb of USABLE VRAM.

The data between the cards is mirrored so running 2 or more cards only increases the raw processing power and not the amount of memory a game can use.

 

[BinnsY]

Nope you only get 3GB total. Each card has to have the same information duplicated on them so they can both render alternate frames.

 

[BaDBoY_uK]

No. It mirrors. So 4x 3GB SLI cards = 3GB usable

 

[drex69]

I pretty much thought that to be honest, but just wasn't sure.

Thanks for pointing me in the right direction.

 

[Martini1991]

Mantle is meant to have the ability for VRAM to stack, but I don't think it's actually working yet

 

[drex69]

It's a shame that, it doesn't work like that, as many more people, might
invest in a second card, resulting in more sales.

But for obvious technical reasons, I presume its impossible.

 

[Orangey]

If you are willing to forego traditional AFR and create a custom solution you can theoretically stack the VRAM. However only 1 card will be spitting out frames and AFAIK this is just a future scenario from Mantle dev talks, nobody has done this except for people using dedicated PhysX cards.

 

[mushtafa]

I'm very surprised they can't stack the RAM of multiple cards, surely it's only the software side of things that need to change?

 

[Martini1991]

I'm pretty sure people missed my post.
Mantle has that feature touted... Soo....... Yeah.

 

[bigmac121]

I'm pretty sure people missed my post.
Mantle has that feature touted... Soo....... Yeah.

Interesting...Too bad I'm on the green Team