1. For AMD (Duron;K7;XP) & Intel (PII,PIII,P4) single processor-based mainborad(20pins)
Please use connector A with adapter cable H, see Fig1 below

Fig 1

2. For Intel Dual CPU(Xeon) server main-board (24 pins & 8 pins)
Please use connector A with connector B, see Fig 2 below

Fig 2

3. For AMD Dual CPU MP(Tyan 2462/2468) server main-board (24 pins & 8 pins & 1 pin)
Please use connector A, connector B and connector G with adapter cable I, see Fig 3 below

Fig 3