NVIDIA has finally released a set of official drivers that enables Quad SLI support with its GeForce 7950 GX2 dual-PCB graphics cards. The new 91.45 ForceWare drivers can be downloaded here.The folks over at Guru3D, [H]ard|OCP, HotHardware and PC Perspective have already put GeForce 7950 GX2-powered Quad SLI rigs to the test.  As one might expect, these systems are screaming fast!

For Quad-SLI owners, configuring a system doesn't necessarily stop once the hardware is up and running, however. To take advantage of the high resolutions offered by today's crop of large monitors, many games have to be modified manually. For power users, we don't think this will be an issue, but for gamers that don't happen to be very tech savvy, taking advantage of what Quad-SLI offers could be somewhat difficult. Keep that in mind.  Another major consideration for Quad-SLI is cost. The parts needed to assemble a worthwhile Quad-SLI system are considerably expensive at this time. The products we used for our build consisted of the following core components...

Core 2 Extreme X6800 - $1300
XFX GeForce 7950 GX2 - $570 x 2
Corsair TWIN2X2048-6400C3 - $400
Asus P5N32-SLI SE Deluxe - $250
Turbo Cool 1 Kilowatt - $500
Dell 3007WFP - $2199
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Total Cost - $5789

As you can see, we were approaching the $6000 mark with just the core components to a high-end Quad-SLI rig. We did not take into account a case, drives, input devices, a dedicated sound card, or any other accessories for that matter. Clearly, Quad-SLI is not for everyone; then again it isn't meant to be. But for those that can afford the hardware, there is currently nothing more powerful when it comes to graphics performance. And as NVIDIA further optimizes their Forceware drivers, Quad-SLI performance and compatibility should only get better.