Motherboard, memory and CPU ~30W
Geforce III Vanilla ~40W
2x Voodoo II lets say ~20W
HDD and the rest less than 30W on those rails for sure

I think it would work but I would get a better suited PSU anyhow.

The CPU gets its power from the 5V line, as with other pre-P4 designs. 12V is only used for keeping drives spinning, so you really don't need much there. It should be fine. Let's turn the question around: *why* do you think 120W on 3.3V and 12V combined won't be enough?

dionb wrote:

The CPU gets its power from the 5V line, as with other pre-P4 designs. 12V is only used for keeping drives spinning, so you really don't need much there. It should be fine. Let's turn the question around: *why* do you think 120W on 3.3V and 12V combined won't be enough?

I think he wanted to say +5v and +3.3V combined. 😀

Yes, it's a bit ambiguous between title and topicstart. If it's a low-end P4 style 350W PSU instead of a mid/high end Athlon style I see the challenge - but even so this should be fine, although you really want a PSU that delivers most of its current on 5V for a system like this. Good thing good early ATX power supplies aren't considered highly valuable collectibles yet (except perhaps amongst Antec fanboys 😉 )

dionb wrote:

The CPU gets its power from the 5V line, as with other pre-P4 designs. 12V is only used for keeping drives spinning, so you really don't need much there. It should be fine. Let's turn the question around: *why* do you think 120W on 3.3V and 12V combined won't be enough?

The last board I had, the SE440BX-2 wouldn't boot with it, it only liked an 350w Antec only. I remember reading somewhere else that 180w was the threshold to look for, I'll try it out and post the results.

Skyscraper wrote:

dionb wrote:

The CPU gets its power from the 5V line, as with other pre-P4 designs. 12V is only used for keeping drives spinning, so you really don't need much there. It should be fine. Let's turn the question around: *why* do you think 120W on 3.3V and 12V combined won't be enough?

I think he wanted to say +5v and +3.3V combined. 😀

Oops, yer right, I stand corrected!