a massive, single-PCB card that stretches a foot long—an inch more than the already-lengthy Radeon HD 5870 and an inch and a half longer than ATI’s Radeon HD 4870 X2. This will unquestionably be a sticking point for enthusiasts with cramped enclosures. Enthusiasts are a resourceful bunch, though.
SourceComplementing the purportedly more-scalable hardware is a bit of special software. The voltage tweaking utility comes first. ATI’s reference example took our GPU from 1.05V to 1.1625V and our memory from 1.1V to 1.15V. We’re curious to see if third-party board vendors choose any voltage levels above or below those levels. Second, ATI caps the core and memory clocks much higher, letting you choose up to 1,000/1,500 MHz frequencies. We were able to get our sample stable at 925/1,300MHz.
it looks like the only way to get better than this one card's performance on the nvidia side would be dual GTX 295's