Product: 9800GX2 Quad SLI
Company: nVIDIA
Authour: ChrisRay
Editor: Charles 'Lupine' Oliver
Date: March 25th, 2008
Introduction and Setup

Nvidia 9800 GX2 Quad SLI
Nvidia 9800 GX2 Quad SLI

We ended our preview of Nvidia's new 9800 GX2 video card with a little teaser about an upcoming article comparing 9800 GX2 Quad SLI setup against a PSU knee shattering 8800 GTX Tri SLI configuration. In this article we will offer a small Quad SLI setup guide, take a gander at some new software available with the configuration and, most importantly, check out the performance gained with this new offering by Nvidia. Join Rage3D as we put on our protective gear, call in a warning to our local power company, and see what these babies can do!

Operating System Considerations

The concept of Quad SLI was first introduced with Nvidia's Geforce 7950 GX2. The design was undermined in many games by scaling issues due to a Windows XP issue imposing a three frame store limit. Windows Vista, however, does not have this problem, and Nvidia has worked closely with Microsoft to ensure that Windows Vista provides the best multi GPU experience, and recommends users download Service Pack 1 for Windows Vista.

Power Supply requirements

In our 9800 GX2 Performance Preview, we detailed the performance requirements of a single 9800 GX2, mentioning that an 850W PSU is recommended for Quad SLI. We recommend reviewing those requirements as well as taking a look at Nvidia's list of Compatible Power Supplies for more information. In summary, however, these are the PSU requirements for official Quad SLI support:
  • PSU must pass all requirements for a single 9800 GX2 for backwards compatibility.
  • PSU must have two 8 pin capable power connectors and 2 6 pin connectors. The 8 pin power connectors are a requirement for the 9800 GX2 cards to run.
  • Have a total peak power of 880Watts.
  • Hybrid Power support.
Test Setup
Vista Ultimate x64 SP1
Intel Core2Duo e6300 @ 3.2 GHz
XFX Nforce 790I Ultra @ 1828 FSB
2 Gigs Crucial Ballistic @ 2000 MHz
Geforce 9800GX2 Quad SLI
PC Power and Cooling 1.2 Kilowatt PSU
Olevia 27 Inch Widescreen HDTV
Forceware 174.53

Tested Configurations
9800 GX2
9800 GX2 Quad SLI
8800 GTX
8800 GTX SLI
8800 GTX Tri SLI
8800 GT SLI

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