EVGA SuperNOVA 650 G1+ PSU Review: Efficient And Silent

Teardown & Component Analysis

Before proceeding with this page we strongly encourage you to a look at our PSUs 101 article, which provides valuable information about PSUs and their operation, allowing you to better understand the components we're about to discuss.

General Data
Manufacturer (OEM)FSP
Primary Side
Transient Filter4x Y caps, 2x X caps, 2x CM & 1 DM chokes
Inrush ProtectionNTC thermistor
Bridge Rectifier(s)1x
APFC MOSFETs2x Infineon IPA60R125P6 (650V, 19A @ 100°C, 0.125Ω)
APFC Boost Diode1x STMicroelectronics STTH8R06FP (600V, 8A @ 100°C)
Hold-up Cap(s)1x Nippon Chemi-Con (450V, 390uF, 2000h @ 105°C, KMR)
Main SwitchSTMicroelectronics STF25N80K5 (800V, 12.3A @ 100°C, 0.26Ω)
Reset SwitchCET CEF03N8 (800V, 2A @ 100°C, 4.8Ω)
Combo APFC/Switching ControllerFSP 6600 IC
TopologyPrimary side: Active Clamp Reset Forward topology
Secondary side: Synchronous rectification & DC-DC converters
Secondary Side
+12V MOSFETs2x
5V & 3.3VDC-DC converters: 4x Infineon IPD031N03L G (30V, 90A @ 100°C, 3.1mΩ)
PWM controller: 2x FSP6601 
Filtering CapacitorsElectrolytics: Chemi-Con (1-5000 @ 105°C, KZE), Chemi-Con (1-5000 @ 105°C, KZE), Chemi-Con (4-10,000 @ 105°C, KY)
Polymers: Chemi-Con
Supervisor ICWeltrend WT7579
Fan ModelProtechnic Electric MGA13512XF-O25 (135mm, 12V, 0.38A, hydro dynamic bearing)
5VSB Circuit
Switching FET1x CET CEF02N7G (700V, 1.3A @ 100°C, 6.75Ω)
Rectifier1X STMicroelectronics STPS20L60CT SBR (60V, 20A)

The 650 G1+'s platform is similar to the one found in be quiet!'s Pure Power 10 600W. The major differences between them, aside from capacity, include EVGA's fully modular cabling and its exclusive use of Japanese capacitors.

An Active Clamp Reset Forward (ACRF) topology is utilized on the 650 G1+'s primary side, which offers high efficiency and lower production cost since it doesn't need extra components like an LLC resonant converter. In low-capacity ACRF designs, only two FETs are used. One of them is the main switcher (Q1), while the other one is a reset switch (Q2) responsible for disconnecting the clamp capacitor when Q1 is active. Power is transferred from the primary side to the secondary one only when Q2 is open. An ACRF design's strongest advantage is the almost lossless switching of Q1. While it's off, drain voltage is very low. ACRF-based platforms also achieve long hold-up times, even with low-capacity bulk capacitors. That's why the 650 G1+ demonstrates an increased hold-up time, despite a smaller bulk cap.

The album above includes photos of the 650 G1+'s major parts, while the video below covers its internals.  

MORE: Best Power Supplies

MORE: How We Test Power Supplies

MORE: All Power Supply Content

Create a new thread in the UK Article comments forum about this subject
This thread is closed for comments
No comments yet
Comment from the forums
    Your comment