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Corsair TX550M & TX750M Power Supply Review


Closer Look:

The Corsair TX550M and TX750M are both finished with a slightly textured matt black paint.




















The hexagonal-holed exhaust grill occupies all the available space around the IEC mains input connector, small mains on/off rocker switch, and model number label. The captive cable set leaves the power supply via a plastic lined port and is sleeved all the way into the unit to protect the cable set from possible damage by the metal enclosure. The modular cable sockets number just four on both models; blue for PCIe or ATX12V/EPS12V (TX750M only) and black for peripherals. The model number is located on the side panels along with comprehensive specifications on the bottom face. The gloss black fan grill, with a Corsair logo at its centre, is internally mounted.




The TX550M captive cable set consists of a 20+4 pin motherboard, 4+4 pin ATX12V/EPS12V, a chain of three 4 pin peripheral connectors, and chain of three SATA connectors. The TX750M captive cable set is almost identical, with the addition of an extra connector on the peripheral and SATA chains, and two 6+2 pin PCIe connector cables.



The modular cable sets also differ slightly. The TX550M comes with a chain of three 4 pin peripheral connectors, a chain of three SATA connectors, and two 6+2 pin PCI-E connector cables. On the other hand, the TX750W comes with an additional chain of four SATA connectors, two more 6+2 pin PCI-E connector cables, and an extra 4+4 pin ATX12V/EPS12V connector cable. It's worth noting that there are no modular 4 pin peripheral connectors with the TX750M. As well, you cannot use the two modular 6+2 pin PCI-E connectors and the extra 4+4 pin ATX12V/EPS12V at the same time because there are only two blue sockets. If a floppy disk drive is part of the equation, then you will still be catered for, as both units feature an addition of two 4 pin peripheral to 4 pin floppy disk drive adapter cables.



The cooling fans in both units are good quality Yate Loon D14BH-12 models with dual ball bearing to keep noise to a minimum. The internals, at first glance, are the same though on closer inspection, the primary capacitors differ in value – 330uF in the TX550M and 470uF in the TX750M. This implies the TX750M is upgraded throughout, to cater for the increase in power. The capacitors are all good quality and rated at a working temperature of 105°C.



The Corsair TX550M and TX750M are well-packaged with a good set of accessories, although a user manual would be welcome if not expected. The build quality is good, but how do they perform? Let's move on and find out.

  1. Introduction & Closer Look
  2. Closer Look (The Power Supply)
  3. Specification & Features
  4. Testing: DC Voltage Load Regulation
  5. Testing: DC Voltage Load Regulation (Cont.)
  6. Testing: Efficiency, Power Factor
  7. Testing: DC Quality
  8. Testing: Temperature, Noise Level & Fan Speed
  9. Conclusion: TX550M
  10. Conclusion: TX750M
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