Corsair SF1000L SFX-L PSU Review

Part Analysis

General Data
Manufacturer (OEM) Great Wall
PCB Type Double-Sided
Primary Side
Transient Filter 4x Y caps, 2x X caps, 3x CM chokes, 1x MOV
Inrush Protection 1x NTC Thermistor SCK-056 (5 Ohm) & Relay
Bridge Rectifier(s)
2x Shindengen US30KB80R (800V, 30A @ 97°C)
2x Infineon IPW60R060C7 (600V, 22A @ 100°C, Rds(on): 0.06Ohm)
APFC Boost Diode
1x Cree C3D16065A (650V, 16A @ 142°C)
Bulk Cap(s)
2x Rubycon (420V, 510uF & 330uF each or 840uF combined, 3,000h @ 105°C, MXK)
Main Switchers
2x ON Semiconductor FCP104N60F (600V, 24A @ 100°C, Rds(on): 0.104Ohm)
Driver IC 1x Novosense NSi6602BD
APFC Controller Champion CM6502UHHX & CM03AX
Resonant Controller Champion CM6901X
Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters
Secondary Side
+12V MOSFETs 8x Vishay SiR608DP (45V, 166A @ 70°C, Rds(on): 1.8mOhm)
5V & 3.3V DC-DC Converters: 4x Advanced Power AP4024GEMT (30V, 60A, Rds(on): 4.5mOhm)
PWM Controller(s): ANPEC APW7159C
Filtering Capacitors Electrolytic: 2x Rubycon (3-6,000h @ 105°C, YXG), 2x Rubycon (4-10,000h @ 105°C, YXF)
Polymer: 9x NIC, 3x United Chemi-Con, 20x FPCAP, 4x Nichicon
Supervisor IC IN1S429I-SCG (OCP, OVP, UVP, SCP, PG)
Fan Controller Microchip PIC16F1824
Fan Model Corsair NR1215 (120mm, 12V, 0.55A, Fluid Dynamic Bearing Fan)
5VSB Circuit
1x Infineon ICE5QR1680AG (800V, 5.8A, Rds(on): 1.75Ohm) &
1x Texas Instruments
CSD18534Q5A FET (60V, 13A, Rds(on): 9.8Ohm)
Standby PWM Controller Infineon ICE5QR1680AG

Great Wall has vast experience in building small-factor platforms. Corsair uses it already for its SF line and, given the good results, decided to use it again in the SF-L line. Despite the small PCB, there is enough space on the secondary side for good airflow. The installation of both VRMs, generating the minor rails, on a vertical board helped in this. The primary side’s heatsink is large enough to host all parts that require strong cooling to cope with high loads. The pair of bulk caps is necessary to provide a long hold-up time because there is no space for a single, huge one.

The soldering quality is good, GW usually doesn’t disappoint in this area, and on the solder side of the PCB, we find all FETs regulating the 12V rail, along with several other interesting ICs, the description of which you will find on the table above. Lastly, the 120mm cooling fan uses a fluid dynamic bearing and is pretty strong, with 0.55A max current input.

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6 thoughts on “Corsair SF1000L SFX-L PSU Review

  1. Can your reviews add coil whine testing… Certain loads with coil whine Dba test results or something. I found all the Corsair PSUs appear to have some coil whine under load. Asus Loki apparently has as much if not more coil whine. Apparently Seasonic PSUs have less coil whine but a lot of complaints about fan noise (I replace fans in my PSUs) :P. I do like the Corsair PSUs, I build for silence so coil whine under load conditions defeats this goal.

    1. Actually most complain for coil whine in the seasonic Vertex. We do test for coil whine but the fact is that we only get 2 samples per unit. If we notice coil whine we mention that in the reviews.

  2. Another excellent review, Aris – thank you! It’s safe to say that I wouldn’t even consider buying a PSU without your thorough review. I do wonder though, I noticed that the unit is actually Platinum rated according to:

    Perhaps this was a marketing choice by Corsair, but even so, an odd one!

    I’m currently torn between the Corsair SF1000L (noise isn’t a concern as long as the fan does its job), the Thermaltake Toughpower 1000W, and the ROG-Loki. However, I’m hesitant about the ROG-Loki due to reported coil whine issues. If you could only recommend one SFX-L 1000W+ PSU, which would you choose (even if not listed)?

    Thanks in advance for your insights!

    1. It is Platinum in Cybenetics, because of the different methodology that it uses compared to 80 P.
      I don’t have an Asus Loki review sample so far and this troubles me. Asus marketing in general is so so, rarely sending out review samples.
      I would go for the Corsair SFX-L. Currently it is the best option, especially if you don’t care about noise at high loads.

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