Originally Posted by Lfctony
Damn Xion, the 3870x2 was a mess...
That it was. I think it was similar to the 9800GX2 in that it suffered from a lack of VRAM and PCI-e bandwidth.
You can see here that the total interconnect benefits from the PCI-E 2.0 and nearly doubles the bandwidth of prior gen--even when not factoring in the sideport, which is currently disabled (sorry, not trying to load this topic w/ ATI information, but it's where the majority of my recent experience is):
Add to this extra bandwidth another 512MB of VRAM and you have a much better overall dual-GPU solution.