MSI Mag A550BN

Gwyn · 2026-03-27T14:30:35+0000

Hi there

Anyone using this MSI PSU? I am looking for a cheap reliable PSU for a basic office AM5 system. I also want to know how quiet the fan is as it doesnt have a zero RPM mode.

Only using on board gpu.

Thanks

Grimley · 2026-03-27T18:03:40+0000

Review of it here:

https://www.tomshardware.com/pc-components/power-supplies/msi-mag-a550bn-psu-review#section-psu-quality-and-bottom-line

It says that the fan doesn't ramp up until the load reaches 400 Watts. I seriously doubt an AM5 rig with onboard GFX will consume even a Quarter of that. I have a similar office rig with a 550 superflower, it has a semi passive mode and it doesn't come on, not even when I do the odd encoding and the CPU is on full load. It would be worth a punt for that spec.

tamzzy · 2026-03-27T18:05:29+0000

i've used one previously. can recommend.

Gwyn · 2026-03-27T18:36:49+0000

tamzzy said:
i've used one previously. can recommend.

That’s great, thanks.