Hello everyone,

I'm encountering a very frustrating and highly unusual issue with two brand-new FSP 850W Vita GM Gold PSUs, and I'm looking for insights or similar experiences.

System Specs:

CPU: Intel Core i5-14600K

Motherboard: ASUS ProArt B760-Creator D4

Cooler: DeepCool 360mm AIO Liquid Cooler

RAM: 16GB DDR4


The Problem:
I initially purchased a new FSP 850W Vita GM Gold PSU. Upon connecting the 24-pin and CPU power cables, I noticed that pressing the case power button resulted in a loud “WEEEEEEEEEZZZ” sound (coil whine / electronic noise) that repeated several times.
The seller confirmed this was a manufacturing defect and sent me a replacement.

The Replacement Unit (Worse Condition):
The second, sealed replacement unit exhibited the exact same loud WEEEZZ sound, but this time, the PC would not turn on at all — it just repeatedly failed to start.

The Crucial Test:
To rule out any issue with my motherboard or wiring, I installed my old PSU — an FSP 700W (older model) — using the exact same cables and connections.

Result: The PC booted up and worked perfectly fine, with zero noise or startup issues.

Has anyone else encountered this specific loud startup failure with the FSP Vita GM series?

Please, I kindly ask you to forward my issue to FSP Company.

Two Brand-New FSP 850W Vita GM PSUs - Both Defective with Loud "WEEEZZ" Sound and Failure to Start!