I gave my mate a set of 5.1 speakers with subwoofer that had been in my dads garage. They are creative inspire 5.1 5300. They are still working and the subwoofer is working.
This is the diagram for connecting the wires on the back of the subwoofer.

1 Line Out 1 jack (Front L/R)
2 Line Out 2 jack (Rear L/R)
3 Line Out 3 jack (Center/Subwoofer)
4 5.1 channel audio cable (available separately)
5 Front (Audio Input) jack
6 Rear (Audio Input) jack
7 Center/Subwoofer (Audio Input) jack
My mates motherboard is a Gigabyte GA-970A-DS3 and he is on Win 8.1
According to that diagram in the back of the subwoofer he should have the orange jack in centre/subwoofer, the black jack in rear, and the green jack in front and obviously the speakers in the speaker holes. He definitely has all the wires in the correct places in the back of the subwoofer.
The problem he has is the three wires/jacks (orange, black and green) going from the sub to his PC. According to the diagram on the PC the green jack should be going into line out 1 (Front L/R) , the black jack to line out 2 (rear L/R), and the orange to line out 3 (center/subwoofwer). On his motherboard/back of his PC he only has line in, line out and mic?
Is there something he is doing wrong or does he need a dedicated soundcard? I am confused as his motherboard manual says it can do 5.1 sound.
This is the diagram for connecting the wires on the back of the subwoofer.

1 Line Out 1 jack (Front L/R)
2 Line Out 2 jack (Rear L/R)
3 Line Out 3 jack (Center/Subwoofer)
4 5.1 channel audio cable (available separately)
5 Front (Audio Input) jack
6 Rear (Audio Input) jack
7 Center/Subwoofer (Audio Input) jack
My mates motherboard is a Gigabyte GA-970A-DS3 and he is on Win 8.1
According to that diagram in the back of the subwoofer he should have the orange jack in centre/subwoofer, the black jack in rear, and the green jack in front and obviously the speakers in the speaker holes. He definitely has all the wires in the correct places in the back of the subwoofer.
The problem he has is the three wires/jacks (orange, black and green) going from the sub to his PC. According to the diagram on the PC the green jack should be going into line out 1 (Front L/R) , the black jack to line out 2 (rear L/R), and the orange to line out 3 (center/subwoofwer). On his motherboard/back of his PC he only has line in, line out and mic?
Is there something he is doing wrong or does he need a dedicated soundcard? I am confused as his motherboard manual says it can do 5.1 sound.