Installing and Configuring the XFX nForce 680i SLI Motherboard
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While NVIDIA recommends an SLI-Ready power supply, the following table
provides some general power supply recommendations based on testing
performed in the NVIDIA SLI validation lab.
Table 6.
Recommended Power Supplies
NVIDIA SLI System Type
Minimum Recommended PCI Express
Power Supply
High-End: GeForce 6800 Ultra
500W–550W, +12V @ 30A
Mid-Range: GeForce 6800 GT or 6800
420W–480W, +12V @ 25A
Entry-Level: GeForce 6600 GT
350W–420W, +12V @ 20A
If the power supply specifies two 12V windings (i.e. 12V1 and 12V2), add these
numbers together to check against the specifications described above.
For systems with the 6800 Ultra or 6800 GT, please make sure the power
supply also contains PCI Express auxiliary power supply connectors. If your
power supply does not have a PCI Express auxiliary connector (6-pin
connector), please contact your graphics board partner for an HDD-to-PCI
Express power adaptor.
The NVIDIA SLI power supply recommendations are based on the following
test configurations:
High-End NVIDIA SLI Configuration:
Dual GeForce 6800 Ultra Graphics cards
Athlon 64 939-pin CPU or Intel Xeon
Two or more HDD, including RAID 0,1, 0+1 or 5 configurations
Two optical drives
PCI sound card
Mid-Range NVIDIA SLI Configuration:
Dual GeForce 6800 or GeForce 6800 GT Graphics cards
Athlon 64 939-pin CPU
Single HDD
Two optical drives
PCI sound card
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