Just using 4 pin p4 connector on PSU for a motherboard

[emperus]

So, I have an itx motherboard that just uses the 4pin P4 12V cable for power. I was planning on using the p4 from the ATX psu that came with the case. Now I have a couple of questions. 1.) Is there anything I am overlooking 2.)What would be the most elegant way to power on the psu. I have a silverstone sg-05. I was thinking of splitting the power button wire to connect it to the MB and also to jumper the PSU. So, pressing the power button should start the Power supply, but how would I keep it on once I release the power button?

Any thoughts would be great.

 

[VirtualLarry]

wait, a mobo, that ONLY uses an ATX12V, and not the usual 20/24-pin ATX mobo connector? That's rather curious, do you have a link to a picture?

 

[emperus]

http://www.msi.com/product/ipc/AM-690E.html

Check out the product picture. Look on the bottom right next to the dimm slot. The "power source" description is wrong though. But if you download the manual you'll see the ATX 12V description.

 

[Icecold]

~15 years of building computers and that's the first time I've seen anything like that. I'm assuming it has circuitry on the board to drop the 12v from the 4 pin connector to the 3.3v and 5v that the board needs?(or maybe doesn't need.. again first time I've ever seen something like that).

Anyways, does the power supply that came with your case have an on / power switch? If so, could you permanently solder the green wire from the ATX connector to ground, and turn the power supply on and off with the switch?

 

[VirtualLarry]

Wow, that board sure is a strange duck. Thanks for posting the pic.

 

[emperus]

~15 years of building computers and that's the first time I've seen anything like that. I'm assuming it has circuitry on the board to drop the 12v from the 4 pin connector to the 3.3v and 5v that the board needs?(or maybe doesn't need.. again first time I've ever seen something like that).

Anyways, does the power supply that came with your case have an on / power switch? If so, could you permanently solder the green wire from the ATX connector to ground, and turn the power supply on and off with the switch?

The board drops the 12V to 5 and 3.3. There is even a connector on the board to use for SATA power.

I guess that isn't a bad idea. It's replacing my WHS board, so no need to be powering up and down. But what would I do when the computer goes into sleep mode.. What does the PS do in sleep mode(fans)? I liked the board because it was no frills and had exactly what I needed. I did think it had a pci-e slot. But it is becoming a lil bit more complicated.

 

[ElFenix]

i think you need something like this:
http://www.mini-itx.com/store/?c=10#ac150

spcr thread on the adapter:
http://www.silentpcreview.com/forums/viewtopic.php?t=59638