Biostar P41D3 Setup Manual page 13

SATA1~SATA4: Serial ATA Connectors
The motherboard has a PCI to SATA Controller with 4channels SATA interface, it
satisfies the SATA 2.0 spec and with transfer rate of 3Gb/s.
ATXPWR2: ATX Power Source Connector
Connecting this connector provides +12V to CPU power circuit.
Note:
Before you power on the system, please make sure that both ATXPWR1 and ATXPWR2
connectors have been plugged-in.
SATA1 SATA3
SATA2 SATA4
7 4 1
2 1
3 4
P41D3
Pin Assignment
1 Ground
2 TX+
3 TX-
4 Ground
5 RX-
6 RX+
7 Ground
Pin Assignment
1 +12V
2 +12V
3 Ground
4 Ground
11