Hardware Installation- 19 -
1-6 Setup of an SLI (Scalable Link Interface) Configuration
The nVIDIA
®
nForce 650i SLI chipset offers blistering graphics performance with the ability to bridge two
NVIDIA SLI-ready PCI Express
TM
graphics cards! This section provides instructions on configuring an
SLI system.
A. Before You Begin
1. Understanding the SLI Configuration Jumpers:
• Normal Mode (Pins 2-3 Close, Default Setting):
• SLI Mode (Pins 1-2 Close):
In SLI Mode, you may use the two PCIe
x16 slots for the following functions:
1. SLI Configuration: Install two SLI-
capable PCIe x16 graphics cards of the
same model to enable SLI functionality.
2. Independent PCI x8 slots: Use the two
PCIe x16 slots as two independent PCIe
x8 slots.
By default, the two PCIe x16 slots are set to Normal Mode, in which the PCIE_16_1 slot operates at up
to x16 but the PCIE_16_2 slot is unavailable.
All the jumper caps on the SLI configuration jumpers (NV_SLI1, NV_SLI2, NV_SLI3, NV_SLI4, NV_SLI5,
NV_SLI6, and JP1) are placed on pins 2-3, as shown in the illustration above.
2. Power Requirements:
Before installation, assure that the power supply you use is able to provide sufficient power to fully
support an SLI configuration and other components in your system. We recommend a power supply
that provides at least 20A 5V and 12V current and a minimum of 400W wattage. Note that the exact
power requirements will depend on your overall system configurations.
3. Supported Operation Systems:
Only Windows XP and Windows Vista operating systems are currently supported by the nVIDIA
®
SLI
technology.
To enable SLI mode, all the jumper caps on the SLI configuration jumpers should be placed on pins
1-2 as shown in the illustration to the upper-right.
SLI Mode
Normal Mode
JP1
NV_SLI6
NV_SLI4 NV_SLI5
NV_SLI3
NV_SLI1 NV_SLI2
Pin 1
Pin 1
Pin 1
Pin 1
Pin 1
JP1
NV_SLI6
NV_SLI4 NV_SLI5
NV_SLI3
NV_SLI1 NV_SLI2
Pin 1
Pin 1
Pin 1
Pin 1
Pin 1
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