The Corsair CX-M series was revamped in 2021, but so far, I didn’t manage to find the time to test any of its members. I will start with the 750W model, which has Bronze efficiency in 80 PLUs and Silver in Cybenetics. It got a Cybenetics Standard++ in noise, so don’t expect it to be dead silent. This is not a high-efficiency platform, after all, and with increased thermal loads, it comes high fan speeds. The unit uses a rifle-bearing fan, which won’t have a problem outliving the five-year warranty. To keep the cost low, Corsair asked Channel Well Technology, the OEM of this unit, for a semi-modular cable design. Only two cables are fixed, ATX and one EPS, so that it won’t make your life hard during installation. On the plus side, you will also get a tighter load regulation on the minor rails because of the lower resistance on the ATX cable.
|Transient Filter||4x Y caps, 2x X caps, 2x CM chokes, 1x MOV, 1x CAP200DG (Discharge IC)|
|Inrush Protection||NTC Thermistor SCK – 2R58 (2.5Ohm)|
1x GBU15L06 (800V, 10A @ 100°C)
2x Champion GP28S50 (500V, 28A, Rds(on): 0.125Ohm)
|APFC Boost Diode||
1x ON Semiconductor FFSP0665A (650V, 6A @ 153°C)
1x Nichicon (400V, 390uF, 2,000h @ 105°C, GG)
2x Champion GP23S60HX
|PFC/PWM Combo Controller||Champion CM6800TX & Champion CM03X|
side: APFC, Double Forward
Secondary side: Semi-Synchronous Rectification (12V) & DC-DC converters (5V & 3.3V)
|+12V||2x Advanced Power AP6N3R5P (60V, 80A @ 100°C, Rds(on): 3.58mOhm) FET & 2x PFC PFR40V60CT (60V, 40A @ 100°C) SBR|
|5V & 3.3V MOSFETs||2x UBIQ QM3054M6 (30V, 61A @ 100°C, Rds(on): 4.8mOhm) & 2x UBIQ QN3107M6N (30V, 70A @ 100°C, Rds(on): 2.6mOhm)
PWM Controller: ANPEC APW7159C
|Filtering Capacitors||Electrolytic: 11x Elite (2-5,000h @ 105°C, ED), 1x Nichicon (4-10,000h @ 105°C, HE), 2x Elite (4-10,000h @ 105°C, EY), 1x Elite (2-5,000h @ 105°C, EK), 1x Nippon Chemi-Con (4-10,000h @ 105°C, KY), 2x Elite (2,000h @ 105°C, PF)
Polymer: 9x APAQ
|Driver IC||Sync Power SP6019|
|Supervisor IC||INI1S429I – DCG (OVP, UVP, OCP, PG, SCP)|
|Fan Model||Hong Hua HA1225H12F-Z (120mm, 12V, 0.58A, Rifle Bearing Fan)|
|Standby PWM Controller||Power Integrations TNY290PG|
The PSU uses CWT’s CSB-A platform. The same is used in the XPG Pylon 750 and the Thermaltake Smart BM2 750. We find a double forward topology on the primary side and a semi-synchronous rectification scheme on the secondary side, for 12V generation. The minor rails are handled by a pair of DC-DC converters. The filtering caps are of good quality. Elite is considered the best alternative to Japanese caps. The Hong Hua cooling fan is a good, choice, too. The soldering quality is decent.
Hold Up Time
Average Efficiency 5VSB
In terms of overall performance, the CX750M performs well. Still, it cannot meet most competing offerings, including the similar-priced EVGA units, which are in a different category, especially the 750 GA.
The Corsair CX750M is a good budget PSU that needs a lower price to become more competitive. I don’t know how EVGA pulled this off, but they destroyed the competition in the budget category with the current pricing scheme of the GA and GT units. EVGA did this before, dropping prices dead-low, to create severe problems for the competition, but in the end, it didn’t manage to do more than get rid of its stock. It is good for the consumers, though, to be able to purchase good units at such low prices.