Corsair TX750M 750W Modular Power Supply Review
Jake Sedge / 13 years ago
Upon opening the PSU I was greeted with a 140mm fan- all you Yate Loon fan-atics (see what I did there?) can rejoice as this PSU has been fully kitted out with an incredibly overkill fan! This fan, admittedly, is quite noisy compared to most I have reviewed and many share my opinion that almost every PSU that uses a Yate Loon fan are the same. Spinning at 2600RPM it produces 45.8dBA and a whopping 140CFM which is simply unnecessary for a PSU, a slower spinning, quieter fan would have been more desirable. Anyway, Yate Loons are for sissies, real men get Deltas! The unit itself is manufactured by CWT and the platform is very similar to that of high end PSUs from Thermaltake. The heatsinks are rather small which probably contributes somewhat to the sound produced by the fan, although modern PSUs really don’t kick out much heat anyway so the heatsinks used are more than sufficient.
The first stage inside a PSU is the transient filtering. This is where the unit filters the AC power coming from the mains so there is less noise which is extremely important as it impacts the efficiency and safety of the later stages, which is partly the reason you see people investing hundreds of pounds in UPS systems which do a similar job. To do this, a system of capacitors, ferrite coils and a metal oxide varistor is used. The quality of this stage is determined by the number of components doing the filtering. Many generic units will only have a singular capacitor or won’t have a metal oxide varistor (MOV). The filtering of this unit consists of an MOV, two coils, two X caps and four Y caps spread between the socket and the PCB, which is more than sufficient.
The primary cap is Panasonic, the caps for the secondary are all made by Nippon-Chemicon, these are some of the best capacitor manufacturers out there so no worries about them going pop!
For the APFC, two SPW20N60C3 MOSFETs are used and bolted onto the heatsink with plenty of TIM thrown in for good measure!
The primary switchers are two G20N50C MOSFETs, there is also a HFS3N80 MOSFET to the right.
This daughterboard houses a PS113 IC which controls the OVP, UVP and SCP as well as the fan RPM.
On the secondary, we can see an array of five SBR40U60CTs for the 12V rail behind which is a thermister for the inrush current protection.
Think this modular PCB look large considering there are only 4 sockets? That is because it holds the VRMs for generating the minor rails. Notice the solid caps used here.
