Introduction

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


The Corsair TX-M line consists of three models with capacities ranging from 550 W to 750 W. In this review, I will take a look at the 750 W unit, which has enough power to support a potent GPU along with a processor that won't bottleneck it. All TX-M models feature a semi-modular cable design to save some money and are classified below the RMx and RM lines in Corsair's PSU hierarchy. Moreover, all are rated Gold by 80 PLUS and Cybenetics, and the TX750M has a Cybenetics A- noise rating.

At only 140 mm long, dimensions are compact, and the rifle bearing fan for cooling measures 120 mm across. The OEM is Great Wall, while Channel Well Technology provides the platform for the RM and RMx. Build quality is high, with all capacitors belonging to good lines from Rubycon, Chemi-Con, and FPCAP, respectable Japanese manufacturers. Given the RM750 uses Elite and Su'scon caps and is supported by a ten-year warranty, I have to wonder why the TX750M with higher-quality parts has three years less. Apparently, the cost of providing a longer warranty has increased, and Corsair wouldn't want to create internal competition between lines. That having been said, the TX750M does use better parts than the RM750. Currently, street pricing for both of these is about the same.

Specifications

Photos

The box is small, and its yellow background draws attention. At the face is a photo of the PSU showing the semi-modular cable design. Corsair makes no effort to hide the fixed cables, which is good because it won't confuse potential buyers.


With nothing but bubble wrap instead of packing foam protecting the unit inside, protection inside the box is mediocre.


The bundle includes fixing bolts, zip ties, and the user's manual. For us reviewers, there is also a flash drive containing information on the product.


The fan grille is not restrictive, which is good for airflow. At the PSU's front is the exhaust grille with the triangular perforations, power switch, and AC C14 receptacle.


The power specifications label has been put on the bottom of the PSU. On the sides, a sticker describes the model number and capacity.


The modular panel only has three sockets.


The 24-pin ATX and EPS connectors are on fixed cables.


Measuring 140 mm deep, this PSU is compact.

Cables and Connectors

The fixed cables are long enough and use 18AWG gauges, which is adequate for a 750 W PSU. The first EPS connector is permanently attached while the second one modular, so both won't have to be attached to the PSU if your mainboard doesn't require the additional CPU power. Finally, the four PCIe connectors are installed on two cables with thicker 16AWG wires up to the first connector.


There are enough peripheral connectors, and with 150 mm between these, they are far enough apart.

Component Analysis

Before reading this page, we strongly suggest looking at this article, which will help you better understand the insides of a PSU.



Great Wall provides the platform, and its build quality is pretty good. Despite the compact PCB and 750 W maximum power output, there is plenty of space on the secondary side, so the fan won't have to work hard to provide the necessary airflow. This looks more like a 500 W than a 750 W platform.


The transient filter starts on the AC receptacle with two Y caps and continues on the main PCB with the other parts.


Two metal oxide varistors (MOV) handle voltage surges, while an NTC thermistor suppresses large inrush currents. A bypass relay supports the latter.


The bridge rectifiers are bolted to the primary heatsink. Combined, they can handle up to 30 A of current.


The APFC converter uses two Vishay FETs and a single CREE boost diode. The bulk caps are by Rubycon and have a combined capacity of 660uF.


The APFC controller is a Champion CM6500UNX supported by a CM03AX Green PFC controller.


The two main switching FETs are installed in a half-bridge topology, and an LLC resonant converter is used for higher efficiency. The resonant controller is a Champion CU6901VPA.


Among other things, the main transformer isolates the primary and secondary sides electrically.


The FETs that regulate the +12 V rail are installed on the business side of the main PCB. A small heatsink cools them.


The electrolytic filtering caps are of high quality, and the same goes for the polymer caps.


Two DC-DC converters generate the minor rails. They use six FETs, and the PWM controller is an ANPEC APW7159C.


The standby PWM controller is a Power Integrations TNY278GN IC.


The supervisor IC is an IN1S429I-SCG.


This is the board holding all modular sockets. It is equipped with several polymer caps for better ripple suppression.


There is not much to see on this side of the board. Soldering quality looks good, though.


The cooling fan is a Corsair NR120L; it uses a rifle bearing. This quality fan will outlive the extended warranty under normal operating conditions.

Test Setup