CORSAIR SF SERIES POWER SUPPLIES

Corsair SF750 PSU rear IO

The Corsair SF series are a SFX power supply for small form factor computers.

  • Harness continuous watts in SFX form, perfect for the most power-dense small-form-factor PCs
  • Ensures ultra-high efficiency operation for less excess heat and lower operating costs
  • Flexible Paracord sleeved cables make routing and cable management incredibly easy
  • Delivers powerful cooling with Low-Noise operation. Continuous output rated temperature – 50 degree celsius
  • Allows installation into both small form Factor and ATX cases
  • SFX, EPS 2.92
  • 128 x 65 x 102mm
  • OEM Great Wall
  • 100 – 240 V 47 – 63 Hz
  • 7 year warranty

CORSAIR SF Series SFX power supplies offer all the low-noise performance of an elite 80 PLUS Platinum PSU, ready to power the world’s best small form factor PCs.

Utilizing PWM instead of the standard DC voltage control, the SF Platinum keeps noise low and delivers precise fan speed. The SF series Platinum also utilizes a copper alloy heatsink, ensuring optimal thermal performance.

The SF series Platinum’s 92mm cooling fan doesn’t spin until you need it, for near-silent operation at low and medium loads.

Using high-end electrolytic capacitors, the SF750 Platinum offers the unwavering power and long-term reliability you demand from CORSAIR.

SF450SF600SF750
MSRP$120$140$178
Part NumberCP-9020181-NACP-9020182-NA‎CP-9020186-NA
Max 12V37.5A50A62.5A

Like most modern PSUs the SFR series all use the NTC Thermistor & Diode at the front end. The main capacitor is the Nippon Chemi-Con (420V, 470uF, 2000h @ 105°C). The PWM is handled by the Champion CM6901X. The Half-Bridge & LLC Resonant Controller Secondary side: Synchronous Rectification & DC-DC converters make up the primary side.

Corsair SF750 internal view

The secondary side uses as many as 6x APower 4N1R8C-A ( 45V, 32A @ 70C, 1.8mOhm). 3.3 and 5V are handled by the DC-DC Converters: 4x Infineon PSMN2R0-30YLE (30V, 100A @ 100°C, 2.8mOhm @ 100°C) PWM Controller: APW7159C. 5V standby is provided by 1x CSD18534 (60V, 13A @ 25°C, 9.8mOhm).

Output regulation is astounding and its better than the AX860i and HX1000i which are also 80 plus platinum. The USB scope had to be zoomed in to see it was well under 50mV.

  • Over Voltage Protection
  • Under Voltage Protection
  • Over Power Protection
  • Over Current Protection
  • Over Temperature Protection
  • Short Circuit Protection

Corsair SF series efficiency

Load testing with the carbon pile show that all of the models can deliver well above the stated values. At least Corsair does not go cheap on max power, they have enough to handle the boost power requirements which tend to be transient just fine. Still it’s advisable to use the highest rated PSU available as they tend to be far more efficient at 40% load.

The SF series are loaded with safety features. The 5V standby is rated at 3A which is better than most competitors. All of the cables are 18 gauge AWG except the floppy adapter. The pair of EPS12V cables is appreciated given motherboard trends of late but one cable is shorter than the other (650mm vs 795mm) when connectors tend to be side by side.

Lots of SATA cabling to handle anything and there is a Molex strand for legacy needs. The PCIe pigtail cables can handle 300W which can handle even the R9 Fury fine. Running a pair of Depending on the model the number of 8-pin connectors ranges from 3 to 4.

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The SF series have zero fan which does not enable until the temperature reaches a threshold.

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The included bracket allows the SF series to be installed in standard ATX chassis.