EVGA P55 SLI - Manual (Page 19)

IEEE1394a (Firewire)
This motherboard has one IEEE 1394a onboard header. Alternatively, you can
also connect this to your system case (if applicable).
1.
Secure the bracket to either the front or rear panel of the system case (not
all system cases are equipped with the front panel option).
Connect the end of the cable to the IEEE1394a header on the motherboard.
Table 3. IEEE 1394a Connector Pins
Connector Pin Signal
IEEE 1394a Connector
10
8
6
4
2
9
7
5
3
1
1 TPA+
2 TPA-
3 GND
4 GND
5 TPB+
6 TPB-
7 +12V
8 +12V
9 Empty
10 GND