Below you can find quick reference tables on SLI. As you can see SLI mode can also be used to increase the maximum resolution your video card can generate.
Mode
Supported Video Cards
Maximum Resolution
Maximum SLI AA
SLI
GeForce 6600 and up All GeForce 7 All GeForce 8
2560x1600
16x
Quad SLI
GeForce 7950 GX2 GeForce 9800 GX2
2560x1600
32x
Three-way SLI
GeForce 8800 GTX GeForce 8800 Ultra
2560x1600
To be confirmed
Hybrid SLI (GeForce Boost)
GeForce 8400 GS GeForce 8500 GT
To be confirmed
To be confirmed
Hybrid SLI (HybridPower)
GeForce 9800 GTX GeForce 9800 GX2
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Below you can find a list with all chipsets that support SLI. Under “PCI Express Mode” we listed what is the real transfer rate of the x16 PCI Express slots when SLI mode is enabled. Keep in mind that when SLI mode is disabled and you have only one video card installed the main PCI Express x16 slot will always work at x16.
Chipset
Supported Modes
PCI Express Mode
nForce 780i SLI nForce 790i SLI
SLI, Three-way SLI, Quad SLI
Two PCI Express 2.0 x16, One PCI Express 1.0 x16
nForce 780a SLI
SLI, Three-way SLI, Quad SLI, Hybrid SLI
Two PCI Express 2.0 x16, One PCI Express 2.0 x8 (all work at x8 when three video cards are installed)
nForce 750i SLI
SLI, Quad SLI
Two PCI Express 2.0 x8
nForce 750a SLI
SLI
Two PCI Express 2.0 x8
nForce 680i SLI
SLI, Three-way SLI, Quad SLI
Two PCI Express 1.0 x16, One PCI Express 1.0 x8
nForce 680i LT SLI
SLI, Quad SLI
Two PCI Express 1.0 x16
nForce4 SLI X16 nForce Professional 3600 and 3050 nForce Professional 2200 and 2050
SLI
Two PCI Express 1.0 x16
nForce 590 SLI
SLI, Quad SLI
Two PCI Express 1.0 x16
nForce 650i SLI nForce 570 SLI (AMD)
SLI, Quad SLI
Two PCI Express 1.0 x8
nForce 570 SLI (Intel) nForce 570 LT SLI nForce 560 SLI nForce 500 SLI nForce4 SLI nForce4 SLI XE nForce Professional 3600 nForce Professional 3400 nForce Professional 2200
