24-pin ATX PSU on a 20-pin board?

icel0rd · 02-14-2002, 11:36 AM

Has anyone successfully used a 24-pin ATX PSU on a 20-pin board?

I bought a 510 watt pp-510d PSU and realized that it was 24-pin and NOT 20-pin and I wondered if I should even bother trying to get the darn thing to work on my 20-pin board.

I searched far and wide for an ATX 24-pin to 20-pin converter, and it is noplace to be found. I considered making a converter, but unfortunately my electronics knowledge is limited. I don't know enough about PSUs to safely and confidently do this.

If anyone could advise me on this, I'd appreciate it.

Thanks

-Ice-

icel0rd · 02-14-2002, 02:17 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, 11:36 AM	#1
icel0rd Cooling Savant Join Date: Jan 2002 Location: Where even the devil wont go Posts: 103	24-pin ATX PSU on a 20-pin board? Has anyone successfully used a 24-pin ATX PSU on a 20-pin board? I bought a 510 watt pp-510d PSU and realized that it was 24-pin and NOT 20-pin and I wondered if I should even bother trying to get the darn thing to work on my 20-pin board. I searched far and wide for an ATX 24-pin to 20-pin converter, and it is noplace to be found. I considered making a converter, but unfortunately my electronics knowledge is limited. I don't know enough about PSUs to safely and confidently do this. If anyone could advise me on this, I'd appreciate it. Thanks -Ice-

02-14-2002, 02:17 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 02:34 PM.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)