2x GTX 690 enough for 7680x1440?

I'm in a bit of an issue here, I'm going for 7680x1440 resolution and am wondering if GTX 690 in SLI is good enough for 7680x1440, in regards to ram.

I'm confused, as a 690 has 2 x 2GB ram, but I keep hearing that 1 x 4GB is better.

Would I hit a vram wall?

It's going to depend on the game and whether you want AA (other than FXAA) or not. Without AA, you'll be fine with 2GB. At that resolution, with AA, 2GB is going to cripple you, and you'd be better off with a triple or quad 4GB setup. Keep in mind that resolution can keep you well below 60fps in many games even with quad SLI, regardless of AA. In some cases you might be performance-limited from even enabling it, and the extra memory wouldn't matter.

"i'm confused, as a 690 has 2 x 2GB ram, but I keep hearing that 1 x 4GB is better."

I'm pretty sure SLI cards don't get their ram added together, both cards have to put everything on the screen into their respective ram. extreme example: if you had 12 cards in sli with 1 gig of ram each in sli you would have 1 gig effective ram not 12 gig, its not additive.

so 2x2gigs of ram = 2gig of effective ram, and 1x4gig = 4gig which is why you hear 4 is better

yes the 690 is 1 physical card, but its really 2 gpu's "slied" on the card as im sure you know. its kinda cheating for best single card performance but amd does it too so whatever.

i miss 3dfx's way of tru sli but i guess with all the postprocessing and shaders and lighting effects nowadays real scan line interleaving would be impossible.

Avatar82 said:

i miss 3dfx's way of tru sli but i guess with all the postprocessing and shaders and lighting effects nowadays real scan line interleaving would be impossible.

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Doesn't NVidia own all 3dfx patent to include SLI, hence them using the term SLI? Did they change it from the original 3dfx implementation?

figgie said:

Doesn't NVidia own all 3dfx patent to include SLI, hence them using the term SLI? Did they change it from the original 3dfx implementation?

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3Dfx's technology was "scan line interleaving"...
nVidia's technology is "scalable link interface".

You can thank them for being annoyingly and intentionally confusing.

Yes the implementation and how it works is different.

Wikipedia said:

Scalable Link Interface (SLI) is a brand name for a multi-GPU solution developed by NVIDIA for linking two or more video cards together to produce a single output. SLI is an application of parallel processing for computer graphics, meant to increase the processing power available for graphics.

The name SLI was first used by 3dfx under the full name Scan-Line Interleave, which was introduced to the consumer market in 1998 and used in the Voodoo2 line of video cards. After buying out 3dfx, NVIDIA acquired the technology but did not use it. NVIDIA later reintroduced the SLI name in 2004 and intended for it to be used in modern computer systems based on the PCI Express (PCIe) bus; however, the technology behind the name SLI has changed dramatically.

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http://en.wikipedia.org/wiki/Scalable_Link_Interface