User guide

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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
Extreme SLI PC NVIDIA has tested the majority of power supplies in this high
power category and therefore only recommends an SLI-ready
power supply.
Ultra High-end SLI PC You must have a power supply that can provide a minimum
of +12V @ 22A of dedicated power for the two graphics
cards. Of this 22A requirement, +12V @ 5.5A must be
available to each of the two PCI Express 6-pin auxiliary
power supply connectors. The remaining 11A must be
supplied to the motherboard for dedicated graphics card use.
High-end SLI PC Minimum of 500-600W Power Supply with a minimum of
+12V @ 30A for all PC components.
Mid-range SLI PC Minimum of 450-500W Power Supply with a minimum of
+12V @ 26A for all PC components.
Entry-level SLI PC Minimum of 400-450W Power Supply with a minimum of
+12V @ 22A for all PC components.
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 GTS, 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:
 Extreme SLI PC Configuration:
¾ Dual GeForce 8800 GTX or 8800 GTS Graphics cards
¾ Intel Core 2 Quad Extreme
¾ EVGA nForce 680 SLI
¾ 2GB system memory
¾ Two HDDs in Raid 0 configuration