DFI NF4 SLI INFINITY User Manual page 54

2
Hardware Installation
The system board requires a minimum of 300 Watt power supply
to operate. Your system configuration (CPU power, amount of
memory, add-in cards, peripherals, etc.) may exceed the minimum
power requirement. To ensure that adequate power is provided, we
strongly recommend that you use a minimum of 400 Watt (or
greater) power supply.
Important References of Power Supply Requirements
CPU
PCIe x16
+12V
Wattage
54
Athlon 64 FX-55 Athlon 64 3800+
6800 Ultra x2
> 25A
>= 500W
Athlon 64 3400+
6800GT x2 6600GT x2
> 20A
>= 400W >= 350W
> 17A