How to check for PSU Compatibility on a new Motherboard

gezimd · Apr 23, 2017

So I got an esprimo the other day and it's an okay one. 2nd gen i5 with 8 gigs of ram. However, the gpu is an integrated intel one, and the PSU is a useless 250watt with no pins at all. I want to add a proper gpu with it requires 6pins, which has me in need of a PSU replacement.

I have a 550watt unused PSU which has plenty of everything I need. Thing is I'm not sure if it'll be compatible to the board. My question is, how do I check if it'll work well on my new pc?

Any kind of help appreciated, thanks in advance!

atljsf · Apr 23, 2017

to the mainboard? if the mainboard has a 20 or 24 pin power connector and a 4 or 8 pin cpu power connector

it will be compatible

mainboard and psu talk via the 24 pin connector, the 4 or 8 pin cpu power is just to give power to the cpu

thre is no more interaction between those and both must comply with atx standards, all psus with those two cables will work with all mainboards with those two connectors

what you need to be sure is if the psu itself is not elcheapo brand and will burn when you apply load when gaming killing parts of the pc with it

13thmonkey · Apr 23, 2017

precisely what is the 550W psu?

gezimd · Apr 23, 2017

13thmonkey :

I don't know the name or model. It belong to an M470-2 Celsius Fujitsu. The one I have right now is P700 Esprimo.

edit; I can check if you want me to. But I'd rather avoid the hassle if there's another way of knowing.

gezimd · Apr 23, 2017

atljsf :

Is that all? Just a 20/24 pin connector mainboard <-> PSU and it'll work? Thing is I've had more complicated workstations than this Esprimo which looks real simple and cheap. I was worried to replace the PSU in fear that the board would be unable to handle it due to incompatibility, as the default design gives a weak look.

13thmonkey · Apr 23, 2017

gezimd :

Well if you can't be bothered to tell us anything about the PSU, ratings etc. then we can't you if it's any good and worth swapping in, it might not actually be better than the 250W unit.

gezimd · Apr 23, 2017

13thmonkey :

That's not what I meant. I was asking if there is a way to know the psu model through the workstation model bc it's the default one. But I'll open the case and have a look.

edit; Fujitsu Siemens S26113-E567-V50-02

13thmonkey · Apr 23, 2017

any rating plate on it? indicating current on the 12V rail? (the answer is yes there probably is).

gezimd · Apr 23, 2017

13thmonkey :

Hope this helps

13thmonkey · Apr 23, 2017

OK, that's weird, and not great news, if you add up the 12V current's you reach 81amps, x12V = nearly 1000W.

So there is some limit on the 12V lines, but it doesn't say what. I'd assume 400W tops on 12V, that will help with decisions regarding it's suitability for GPUs.

gezimd · Apr 23, 2017

13thmonkey :

I understand some of those words. What's the bottom line here? Is there a probability that it won't work or?

13thmonkey · Apr 23, 2017

gezimd :

Treat it like a 400w psu, and you'll be fine I'd expect.

gezimd · Apr 23, 2017

Fine by me. 400W should be plenty, I only need a single pin connector for my dedicated gpu I was going to put. Does that mean that the PSU is stable and there is no need for worry?

13thmonkey · Apr 23, 2017

gezimd :

In theory, no idea of the life it's had though.

gezimd · Apr 23, 2017

13thmonkey :

I do. It's worked excellently for my previous pc, whose mainboard is gone now, thus the replacement. I just want to make use of its parts and move the good stuff to the new one.

Compatibility is all that worried me. And thanks a bunch for the help, I appreciate it.

13thmonkey · Apr 23, 2017

Hmmmmm concerned a little as it does not mention atx 2.0 / 2.1 on the label.

Check the colour codes of the wires against the wiki entry for atx just to be sure

gezimd · Apr 23, 2017

I'll look up atx firstly, as I have no clue what it is. I've tinkered with pc's for a long time, but honestly never had to do anything relating directly to a PSU, so I pretty much know next to nothing about it, hence my uncertainty.

13thmonkey · Apr 23, 2017

gezimd :

The wiki atx page will give you the colour codes for the 24pin connector, each colour corresponds to a voltage. They must be identical to the physical layout on your PSU.

gezimd · Apr 23, 2017

I can't seem to figure out how to check the colors. The 250w seems to be a 16pin connector(?), and has mostly black and yellow wires. Whereas the 400W one has a 24pin connector and has various colors, it's 6 and 8 pins are black and yellow.

13thmonkey · Apr 23, 2017

gezimd :

Ignore the 250,what does the wiki page say they should be?

gezimd · Apr 23, 2017

According to the wiki, the 400W one based on the colors is a 24-pin ATX12V 2.x power supply connector

13thmonkey · Apr 24, 2017

In which case providing the mobo is ATX2.x compliant (I think that they stopped playing stupid games that made them non-compliant pre core series) you are good to go, check each of the other cables that you need to use just in case.

gezimd · Apr 24, 2017

Will do, thanks for replying back.

The mobo of my current pc is rather small though, and seems to have only a 16 pin female(?).

13thmonkey · Apr 24, 2017

gezimd :

Urrgh, 24 & 20 are normal, never heard of 16.

gezimd · Apr 24, 2017

Hope I counted wrong pic

How to check for PSU Compatibility on a new Motherboard

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