You mean the extra 4 pins next to the 20 pin? Yes, I did do that.
Asus A8n sli se
Amd athlon 64 x2 3800 skt 939
Ati x1800xt pci-e 256mb gddr3
1 x 1gb ram (cheapo)
2 x harddrives (1 x 40gb, 1 x 120gb, both IDE)
2 x CD drives
1 x floppy drive
1 x hiper 630w peak psu (580w at 70% eff)
Just need to know what to do once its all wired up, just cant get the screen to display anything when its plugged into the graphics card.
Will start the building again, just need to get washed