Originally Posted by Cloudfire777
Last reply. 690 have the same memory bus as 670, but two of them because it is a dual core. It may have the same core as 680 but the memory bus is different.
I`m not fully updated on hardware, but is that totally impossible to do? If you look at the specs they have lowered the core clock by 100MHz which could explain why they don`t need 2x512bit.
@PureBlackFire: And it do have twice the VRAM as 670, and 2x the memory bus. But the core is different than 670.
These specs could still be legit
If the 670 has 1.75GB of Memory and the 690 is basically a dual 690 then it would be possible, it wouldn't be the first time Nvidia didn't use their flagship GPU in their dual-GPU card, which in the past has meant that the flagship GPU just wasn't efficient enough to run two of them on a single PCB. I believe this was done with the GTX 295, I think it was two 275s on a single PCB with slightly lower clock speeds, resulting in identical memory amounts (per GPU) than the single GPU version.
Oh, and it's usually called "dual GPU" rather than "dual core", cores generally refer to independent modules of a single CPU/GPU, so a GPU can have hundreds of cores.Edited by lordikon - 2/2/12 at 6:25pm