Power supply with ridiculously high output 5V and 3.3V rails?

[japlytic]

A few days ago, I have seen a Shaw 860 (P4-S860) power supply with 47A +3.3V and 50A +5V rails .
I would seriously doubt that any computer would use anywhere near those amounts of power on those rails (+3.3V rail - 4 wires on ATX 20+4 connector and a few for SATA; +5V rail - 5 wires on ATX 20+4 connector, and a couple more for disk drives).

At such high wattages, the power should be concentrated in the +12V rail (for PCI Express devices).

[hkivan]

Re: Power supply with ridiculously high output 5V and 3.3V rails?

maybe , it is an old version ATX PSU ?
A 500W PSU at the time before P4 could have 50A @ +5V

[Oklahoma Wolf]

Re: Power supply with ridiculously high output 5V and 3.3V rails?

Some old Xeon server boards from the P3 days needed this kind of power on those rails. Nothing recent I can think of, though.

The Shaw is probably intended for something elderly like that... the 24 pin connector goes back to the original EPS spec, and many of those PSUs also had multiple 12V rails as well.

There might be a 6 pin Xeon AUX connector that looks like a PCI-E, only is not electrically compatible. My SunMoon load tester has one of those on the front - IIRC it has two 12V pins, two 3.3V pins, and two ground.