What is a Semi-fanless Psu?

[t0m3927]

What does a semi-fanless PSU mean? Are they alright to use at 550W in a gaming rig (i5 7500, 1050ti, Asus b250g gaming mobo and corsair vengeance lpx 8gb. Thanks.

 

[CountMike]

That usually means that fan is speed adjustable with PSU's temperature. Starts turning only when certain temps are reached.

 

[t0m3927]

Thank you so much that is really useful.

 

[CountMike]

Yes, great for silent running in ordinary use but can provide cooling under load. At that time your other fans will also speed up so PSU fan may be quietest one of all.