Corsair SF Series 750 W Review 11

Corsair SF Series 750 W Review

Load Regulation, Hold-up Time, Inrush Current & Efficiency »

Introduction


We would like to thank Corsair for supplying the review sample.


The Corsair SF750 is the strongest SFX power supply money can buy today. At 750 W, its power density is ultra-high, capable of supporting a very strong system equipped with power hungry components. Its main competitor is the SilverStone SX700-G, which has 50 W less power output and fails to perform as well in nearly every major way (load regulation, ripple suppression, and transient response).



Thus far, Corsair has had a great cooperation with Great Wall, the manufacturer behind the entire SF line. Before the release of the SF750, the SF450 and SF600 Platinum had been introduced, making the competition feel awkward. With the SF750, Corsair's SFX line is now complete, currently dominating this market in terms of performance while even managing to keep output noise low. High performance in tandem with low noise output is very difficult to achieve, especially in small form factor power supplies.



Specifications

Corsair SF750 Platinum Features & Specs
Max. DC Output750 W
PFCActive PFC
Efficiency80 PLUS Platinum, ETA-A (88-91%)
NoiseLAMBDA-A- (25-30 dB[A])
ModularYes (fully)
Intel C6/C7 Power State SupportYes
Operating Temperatures0–50 °C
ProtectionsOver Voltage Protection
Under Voltage Protection
Over Power Protection
Over Temperature Protection
Over Current Protection
Short Circuit Protection
Cooling92 mm Rifle Bearing Fan (NR092L)
Semi-passive operationYes
Dimensions128 mm (W) x 65 mm (H) x 102 mm (D)
Weight0.9 kg (1.98 lb)
ComplianceSFX, EPS 2.92
Warranty7 Years
Price at Time of Review (excl. VAT)$179.99


Besides an 80 PLUS Platinum certification, the SF750 has also been certified by Cybenetics, achieving ETA-A and LAMBDA-A- certifications in efficiency and noise respectively.

Corsair SF750 Platinum Power Specs
Rail3.3V5V12V5VSB-12V
Max. Power20A20A62.5A2.5A0.3A
130W750W12.5W3.6W
Total Max. Power750W

Cables and Connectors

Modular Cables
DescriptionCable CountConnector Count (Total)GaugeIn Cable Capacitors
ATX connector 20+4 pin (300 mm)1116-18AWGNo
4+4 pin EPS12V (400 mm)2216AWGNo
6+2 pin PCIe (400 mm+100 mm)2416AWGNo
SATA (100 mm+120 mm+120 mm+120 mm)2818AWGNo
4-pin Molex (100 mm+120 mm+120 mm)1318AWGNo
AC Power Cord (1380 mm) - C13 coupler1116AWG-

There are two EPS and four PCIe connectors, of which all are capable of handling the unit's full power. The number of peripheral connectors is adequate, and the distance between connectors is satisfactory since this unit will probably be installed into a small chassis.


Corsair should in my opinion also sell a version of this unit with longer cables since a PSU with such high power output can also be used in a larger chassis with more system components because of the included SFX-to-ATX adapter.



Component Analysis

Corsair SF750 Parts Description
General Data
Manufacturer (OEM)Great Wall
Model NumberRPS0115
Primary Side
Transient Filter4x Y caps, 2x X caps, 3x CM chokes, 1x MOV, 1x CMD02X
Bridge Rectifier(s)1x
Inrush Current ProtectionNTC Thermistor & Diode
APFC MOSFETInfineon IPZ60R060C7 (650 V, 22 A @ 100 °C, 0.06 Ohm)
APFC Boost DiodeROHM SCS306AP (650 V, 6 A @ 135 °C)
Hold-up Cap(s)Nippon Chemi-Con (420 V, 470 uF, KMZ series, 2000 h @ 105 °C).
Main Switchers2x 60F2094 (600 V, 15.8 A @ 150 °C, 0.19 Ohm)
Driver ICSilicon Labs Si8230BD
APFC ControllerChampion CM6502UHHX & CM03AX Green PFC controller
Resonant & PWM ControllerChampion CM6901X
Quasi-Resonant ControllerInfineon 5QR1680AG
TopologyPrimary side: Half-Bridge & LLC Resonant Controller
Secondary side: Synchronous Rectification & DC-DC converters
Secondary Side
+12V6x APower 4N1R8C-A (45 V, 32 A @ 70 °C, 1.8 mΩ)
5V & 3.3VDC-DC Converters: 4x Infineon PSMN2R0-30YLE (30 V, 100 A @ 100 °C, 2.8 mΩ @ 100 °C)
PWM Controllers: ANPEC APW7159C
Filtering CapacitorsElectrolytics: 1x Nippon Chemi-Con (4 - 10,000 h lifetime @ 105 °C, KY series), 2x Rubycon (3 - 6,000 h lifetime @ 105°C, YXG series)
Polymers: Nippon Chemi-Con (G61B, G8, G84R, G84G, G85F), 6x Nichicon (LG)
Supervisor ICInfinno IN1S429i-SCG
Fan ControllerPIC16F1824
Fan ModelCorsair NR092L (92 mm, 12 V, 0.22 A, 3950 RPM, Rifle Bearing)
5VSB Circuit
RectifierCSD18534 (60 V, 13 A @ 25 °C, 9.8 mOhm)
Step-Down ConverterTexas Instruments TPS54231 (3.5 V - 28 V Input, 2 A)

The Great Wall platform uses high quality parts, including Chemi-Con, Rubycon, and Nichicon caps. The primary side uses a half-bridge topology along with an LLC resonant converter.


On the secondary side, six FETs regulate the +12V rail, while the minor rails are handled by a couple of DC-DC converters. A PIC controller handles the fan-speed profile, allowing for more precise control.

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