The first reviews are showing up for Nvidia’s beast of a single-slot card, the 9800 GX2. In case you don’t remember it from when it showed on the scene, the GX2 is basically a pair of 8800s in a native SLI, one-PCI-express slot configuration. It costs an arm and a leg (~$600) and it’s very, very powerful. And how does it stand up?
The consensus seems to be that the 9800 GX2 simply outperforms every single card out there. That doesn’t come as much of a surprise, though, considering its specs. HardOCP notes, though, that two 8800 GTXes in SLI matched the 9800 GX2 in performance, and you can get a pair of those for at least a bill less than a 9800GX2. However, you’ll need an SLI-capable motherboard, and of course Nvidia will gladly sell you one.