Hello, A friend gave me a Primergy main board (H/K400 Series; Mainboard D1173) for "playing" . I have everything for it, 2 Xeons ,512MB ECC RAM and so on BUT I don´t know how to switch this little " " on ! There are no Pins like ATX) but there is a ribbon cabel for the power supply (EPS)....I have a power supply, but one with no datainterface. I hope someone of you could help me or could tell me where is the best place to ask. regardes paul