FSP VITA GM 750W ATX v3.1 PSU Review

Part Analysis

General Data
Manufacturer (OEM) FSP
PCB Type Double-Sided
Primary Side
Transient Filter 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV
Inrush Protection 1x NTC Thermistor SCK-056 (5 Ohm) & Relay
Bridge Rectifier(s)
2x GBJ1506 (600V, 15A @ 100°C)
APFC MOSFETs
2x Toshiba TK16A60W (600V, 15.8A @ 150°C, Rds(on): 0.19Ohm)
APFC Boost Diode
1x Toshiba TRS6E65F (650V, 6A, @ 175°C)
Bulk Cap(s)
1x Toshin Kogyo TK (450V, 560uF, 3,000h @ 105°C, LGWA)
Main Switchers
2x Toshiba TK12A60W (600V, 11.5A, @ 150°C, Rds(on): 0.3Ohm)
APFC Controller Champion CM6500UNX
Resonant Controller Champion CU6901VPA
Topology
Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters
Secondary Side
+12V MOSFETs 4x CYStek MTB1D6NO4RH8 (40V, 84A @ 100°C, Rds(on): 1.8mOhm)
5V & 3.3V DC-DC Converters: 4x XSEMI XP3R303GMT-L (30V, 25A @ 70°C, Rds(on): 3.3mOhm)
PWM Controller(s): UPI uP3861P
Filtering Capacitors Electrolytic:
6x Nippon Chemi-Con (1-5,000h @ 105°C, KZE),
2x Rubycon (6-10,000h @ 105°C, ZLH),
Polymer: 4x CapXon, 2x Apaq, 26x
Supervisor IC IN1T703I-SDG
Fan Model Yate Loon D12SH-12 (120mm, 12V, 0.30A, Rifle Bearing Fan)
5VSB Circuit
TVS Diode 1x SMAJ15A
High Side Rectifier US1MGR (1000V, 1A)
Standby PWM Controller Grenery GR9230UK

The design looks clean and neat, with several electrolytic caps on the secondary side, which have unobstructed airflow. The heat sinks are not large, especially on the secondary side, where the 12V FETs are on the PCB’s solder side. The soldering quality is good in this unit. The parts that FSP used are of decent quality except for the fan, which is terrible. The FETs regulating the 12V rail are also by a lesser-known manufacturer, but they didn’t create any issues during testing under harsh conditions.

The unit’s design is contemporary, with a half-bridge topology on the primary side and an LLC resonant converter for lossless switching. Four CYStek FETs handle the 12V rail on the secondary side, and a pair of PWM controllers generate the minor rails. Instead of an ANPEC PWM controller on the VRMs, we find one from UPI.

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10 thoughts on “FSP VITA GM 750W ATX v3.1 PSU Review

  1. brother i want to ask

    right now i have 650 rmx 2018 version of corsair psu

    my system was 7900 gre hellhound standart clock
    7800x3d standart clock
    6400mhz expo ram
    3 hdd 2.5 inc
    1 ssd 2.5 inch
    2 nvme drive
    and a lot of fans like 6 fans

    is this psu decent ? i am planning to get 5070 in future

    this psu was very2 cheap because promotion please answer is it good?

  2. Your in depth reviews of psu’s are amazing.

    I hope you review the Lian Li Edge 1300 and new phanteks revolt 1200. I want one of those psu’s for my new built.

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