Pro/Forums - View Single Post - 24-pin ATX PSU on a 20-pin board?

icel0rd · 02-14-2002, 01:17 PM

Looks like the PSU is ATX 2.03 compliant, which means it is backward compatible to the other PSU units. The extra 4 pins, as documented in the spec are extra 12 volt connectors to accommodate the higher 12v load requirements on higher power systems. The - 12VDC pin isn't on those extra pins, so there probably should not be an issue with using 12V power, since pin 10 is +12VDC and pin 12 is -12VDC.

There is no official standard for the size or shape of the connector, just the pin-outs, so that explains why some of the other PSUs have the extra 4 pins as a separate connector. It appears that they have chosen to use a larger single molex to do the 24 pins instead. No big deal (I think)

The exta 4 pins, as defined in the standard are 12VDC power connectors and they should not have to be hooked up.

Well, I feel better after doing some more homework. This Antec 510w PSU is going to rock ! I think I will try it out on a lab rat machine and see if it fries it first.

-Ice-

02-14-2002, 01:17 PM	#2
icel0rd Cooling Savant Join Date: Jan 2002 Location: Where even the devil wont go Posts: 103	Looks like the PSU is ATX 2.03 compliant, which means it is backward compatible to the other PSU units. The extra 4 pins, as documented in the spec are extra 12 volt connectors to accommodate the higher 12v load requirements on higher power systems. The - 12VDC pin isn't on those extra pins, so there probably should not be an issue with using 12V power, since pin 10 is +12VDC and pin 12 is -12VDC. There is no official standard for the size or shape of the connector, just the pin-outs, so that explains why some of the other PSUs have the extra 4 pins as a separate connector. It appears that they have chosen to use a larger single molex to do the 24 pins instead. No big deal (I think) The exta 4 pins, as defined in the standard are 12VDC power connectors and they should not have to be hooked up. Well, I feel better after doing some more homework. This Antec 510w PSU is going to rock ! I think I will try it out on a lab rat machine and see if it fries it first. -Ice- Last edited by icel0rd; 02-14-2002 at 01:34 PM.