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Installing and Configuring the EVGA 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
SLI System Type
Minimum Recommended PCI Express
Power Supply
High-End: EVGA GeForce 8800 GTX 750W and up, +12V @ 40A
Mid-Range: EVGA GeForce 7950 GT 500W–550W, +12V @ 30A
Entry-Level: EVGA GeForce 7600 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 8800 GTX or 8800 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:
¾ Dual EVGA GeForce 8800 GTX Graphics cards
¾ Intel Core 2 Quad EE 775-pin CPU
¾ Two or more HDD, including RAID 0,1, 0+1 or 5 configurations
¾ Two optical drives
¾ PCI sound card
Mid-Range NVIDIA SLI Configuration:
¾ Dual EVGA 7950 GT Graphics cards
¾ Intel Core 2 Duo
¾ Single HDD
¾ Two optical drives
¾ PCI sound card
Entry-Level NVIDIA SLI configuration: