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Hardware Installation- 19 -
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1-7 Setup of SLI (Scalable Link Interface) Configuration
nVIDIA
®
nForce 680i SLI offers blistering graphics performance with the ability to bridge two NVIDIA SLI-
ready PCI Express
TM
graphics cards! The SLI design takes advantage of the increased bandwidth of
the PCI Express
TM
bus architecture, features hardware and software innovations within NVIDIA GPU
(graphics processing unit) and the nVIDIA
®
nForce 680i SLI chipset. Together, the NVIDIA SLI technolo-
gies work seamlessly to allow two graphics cards to operate in parallel and share the work and deliver
heart-pounding PC performance. This section introduces steps to configure an SLI system on the
GA-N680SLI-DQ6 motherboard.
The exact power requirements will depend on your overall system configurations. You need
a power supply that can provide sufficient and stable power to your system and the two SLI
graphics cards. Please refer to the table below to check recommended power for different
systems.
Before you begin--
If you wish to enable the SLI function, install two SLI-ready graphics cards into the PCIE_16_1 and
PCIE_16_2 slots. (It is recommended to use graphics cards of identical brand and chips. For example:
GIGABYTE GV-NX76T256D-RH).
If you want to set up a single graphics card system, we recommend installing the graphics card on the
PCIE_16_1 slot to ensure better display performance.
System configuration System A System B
Processors Intel QX6700 Intel X6800
PCIE x16 video cards 2±iNVIDIA 6800 Ultra cards 2±iNVIDIA 6600 GT cards
DDR memory modules 4 DIMMs 2 DIMMs
Hard drives/Optical drives 4 hard drives + 2 optical drives 1 hard drives + 1 optical drives
Expansion cards 1 PCIE x1 card + 2 PCI cards 0
USB devices 10 4
IEEE 1394 devices 1 0
Required +12V current 25A or above 20A or above
Power supply requirement 500W or above 350W or above