Corsair CX650F Review – Too Good To Be Bronze


Today we’re going to have a look at project “Mote Rosa” (aka CX650F) from Corsair. This is a unit verified at 80+ silver, but marketed at 80+ bronze. It shares many parts with the Vengeance Silver, which was discontinued around the time CX-F came out. Let’s have a look into this supposedly budget unit!

General Specifications

Introduction year2020
Warranty5 years

Power Specifications



Cable typeCable countConnector count
ATX 20+4 pin11
EPS12v 4+4 pin22
PCIe 6+2 pin22
4 pin Peripheral14
iCue RGB11
Motherboard ARGB11

Featuring dual EPS is a bit over the top for a 650w unit, but is often requested by users. I would’ve personally preferred to have 3 PCIe cables, two daisy-chained PCIe connectors are expected at this wattage. It has sufficient SATA power for the average gaming rig, but less so for something like a workstation or NAS. But this is expecting it to do something it’s not designed for.

Corsair also includes a cable for 3-pin ARGB and an iCUE cable to sync the PSU’s RGB with everything from your keyboard to your case. Makes total sense!


(note: since I had to take the stickers off on the side to open the unit, these aren’t visible on the picture)

Finally! A hexagon exhaust again! I sometimes question if companies look weird at me for having something with this specific shape, but this is looking like a highly effective exhaust to me.

The unit would look nice in something like a Thermaltake Core P3 or Cooler Master Masterframe, but most cases will cover it. This might be the main reason this unit has been sold poorly compared to many other Corsair units.

Overall, I have nothing to complain here. It’s solid, it looks premium, looks effective… Its only real issue is that it might look a little too nice to cover up.



OPPYes (WT7527RT)
OCPYes (WT7527RT)
OTPYes (WT7527RT)
UVPYes (WT7527RT, APW7073)
OVPYes (WT7527RT, APW7073)
SCPYes (WT7527RT)

Most protections lead back to the protection IC, with the DC-DC controller being redundant for minor rail protection. A very solid setup given the price.

Parts Breakdown+Internal

PlatformMote Rosa
Input Voltage100-240VAC
Primary ConverterAPFC Half Bridge LLC
RectifierSynchronous Rectification
FanCorsair NR120L (12v, 0.22a)
BearingRifle bearing
PCB TypeSingle sided
Bulk Capacitor(s)Hitachi HU (400v, 390µF, 105c)
APFC MOSFETs2x Infineon IPA60R180P7 (650V, 11A @ 100°C)
APFC Boost DiodeInfineon IDH06G65C6 (650V, 4A @ 150°C)
Resonant ControllerChampion CM6500UNX + CM03X
Main Switches2x Champion GPT18N50DG (500V, 18A)
12v MOSFETs4x Nexperia PSMN2R8-40YSD (40v, 160a @ 175c)
DC-DC Converters8x Potens Semiconductor PDD3906 (30V, 51A @ 100°C)
DC-DC ControllerAnpec APW7073
Supervisor ICWeltrend WT7527RT (OCP, OVP, UVP, SCP)
Standby PWM ControllerPower Integrations TNY290PG

Now here is where the title comes in. Most of the parts used in this PSU are significantly better than should be expected at this price point and efficiency. A lot of budget 80+ units use a double forward DC-DC (or even group regulation), not an LLC resonant setup Corsair chose for here.

Its only real flaw would seem to be the low capacitance, but as seen in the next part of this review it surprisingly held up fine in hold-up time. The capacitor itself is branded Hitachi, but produced by Jianghai, who bought out Hitachi’s capacitor division a few years ago. Still, the choices regarding quality are solid here, and Corsair didn’t overspend on it by using Japanese brands. The rest of the capacitors are from Teapo, a well-regarded Taiwanese manufacturer.

The fan is branded by Corsair, but is like most of their other PSU fans produced by Hong Hua. It’s a custom designed fan with ARGB lights built in. The rifle bearing is expected to last beyond the 5-year warranty and should become a norm for budget PSUs. Many cheap units use sleeve bearing fans which wear out quicker and give the unit as a whole a shorter lifespan. On higher end units you’ll often see FDB/HDB or a variation on this, which offer an even higher lifespan, but this shouldn’t be expected of a unit like this.

Infineon FETs like these are normally seen in higher end 80+ gold units, this specific model has been found before in the likes of EVGA GM and FSP Hydro G Pro.

I did see a small difference between the sample Aris originally had in his review and report of the CX650F, but this is a minor improvement. The 12v MOSFETs used are a newer version of what it originally used. Nothing to complain about here.

Electrical Performance

The following results are by third party PSU lab Cybenetics. The results shown are based off the CX650F RGB report published on 14-07-2020.

Test Equipment

Electronic loadsChroma 63601-5 x4
Chroma 63600-2 x2
Chroma 63640-80-80 x20
Chroma 63610-80-20 x2
AC SourcesChroma 6530
Keysight AC6804B
Power AnalyzersN4L PPA1530 x2
Sound AnalyzerBruel & Kjaer 2270 G4
MicrophoneBruel & Kjaer Type 4955-A
Data LoggersPicoscope TC-08 x2
Labjack U3-HV x2
TachometerUNI-T UT372 x2
Digital MultimeterKeysight U1273AX
Fluke 289
Keithley 2015 - THD
UPSCyberPower OLS3000E 3kVA x2

Overall (115v)

Average efficiency86,970%
Efficiency at 2% load61,250%
Average efficiency 5VSB78,668%
Standby power consumption0,0553588 watt
Average PF0,984
Average noise output31,15 dB
Efficiency rating (ETA)Silver
Noise rating (LAMBDA)S++

Overall (230v)

Average efficiency89,331%
Average efficiency 5VSB78,154%
Standby power consumption0,0898534 watt
Average PF0,948
Average noise output30.68 dB
Efficiency rating (ETA)Gold
Noise rating (LAMBDA)S++

Efficiency (115v)

Load (115v)EfficiencyAC (Watts)DC (Watts)
20w load68,490%29.18819.991
40w load78,842%50.71039.981
60w load83,296%72.04760.012
80w load85,435%93.59279.960
10% load83,454%77.84364.963
20% load88,029%147.713130.030
30% load89,334%218.332195.035
40% load89,638%290.105260.045
50% load89,355%363.812325.083
60% load88,768%438.750389.470
70% load87,913%517.469454.921
80% load86,978%597.810519.962
90% load86,005%680.350585.136
100% load86,905%765,518649.966
110% load83,779%853,183714.791
Crossload 181,892%161.887132.573
Crossload 285,542%772.378660.705

Efficiency (230v)

Load (230v)EfficiencyAC (Watts)DC (Watts)
20w load69,543%28.74519.990
40w load80,030%49,99539.979
60w load84,472%71.04060.009
80w load86,782%92.13879.959
10% load84,717%76.68064.961
20% load89,494%145.289130.025
30% load90,974%214.378195.029
40% load91,462%284.307260.033
50% load91,396%355.668325.066
60% load91,071%427.597389.416
70% load90,514%502.538454.865
80% load89,862%578.780520.104
90% load89,242%655,624585.095
100% load88,400%735.215649.933
110% load87,529%816.589714.755
Crossload 183,830%159.032133.316
Crossload 288,971%742.542660.645

Voltage Regulation (115v)

Load (115v)12V (voltage)5V (voltage)3.3V (voltage)5VSB (voltage)
20w load12.1745.0863.3305.031
40w load12.1695.0803.3275.024
60w load12.1645.0733.3245.016
80w load12.1605.0673.3225.009
10% load12.1655.0683.3235.005
20% load12.1475.0533.3164.992
30% load12.1285.0433.3104.981
40% load12.1085.0323.3044.969
50% load12.0895.0173.2974.954
60% load12.0715.003.2894.956
70% load12.0524.9853.2824.929
80% load12.0334.9683.2744.916
90% load12.0144.9563.2684.909
100% load11.9904.9453.2624.886
110% load11.9734.9393.2574.880
Crossload 112.1634.9163.2804.988
Crossload 211.9865.0313.2884.963

Voltage Regulation (230v)

Load (230v)12V (voltage)5V (voltage)3.3V (voltage)5VSB (voltage)
20w load12.1765.0863.3295.032
40w load12.1715.0813.3275.024
60w load12.1655.0753.3245.016
80w load12.1605.0703.3225.009
10% load12.1655.0723.3235.005
20% load12.1485.0583.3154.992
30% load12.1305.0483.3094.981
40% load12.1115.0383.3044.969
50% load12.0925.0253.2964.956
60% load12.0735.0103.2884.943
70% load12.0535.0003.2814.929
80% load12.0334.9913.2734.916
90% load12.0124.9823.2674.909
100% load11.9924.9723.2614.886
110% load11.9714.9653.2564.880
Crossload 112.1604.9643.2794.985
Crossload 211.9845.0343.2874.963

Ripple (115v)

Load (115v)12V5V3,3V5VSBPass/Fail
10% load12.60 mV11.50 mV13.10 mV11.60 mVPass
20% load13.60 mV13.10 mV13.40 mV11.70 mVPass
30% load13.10 mV13.20 mV13.60 mV12.10 mVPass
40% load19.20 mV13.50 mV14.40 mV13.00 mVPass
50% load17.60 mV14.00 mV14.60 mV15.00 mVPass
60% load19.90 mV14.70 mV17.20 mV15.40 mVPass
70% load23.40 mV15.50 mV16.70 mV16.60 mVPass
80% load24.40 mV16.60 mV20.70 mV19.70 mVPass
90% load32.90 mV16.80 mV20.20 mV21.70 mVPass
100% load47.10 mV23.00 mV22.60 mV25.70 mVPass
110% load52.50 mV24.60 mV26.90 mV27.20 mVPass
Crossload 121.20 mV21.60 mV24.20 mV09.80 mVPass
Crossload 247.60 mV21.90 mV16.20 mV19.50 mVPass

Ripple (230v)

Load (230v)12V5V3,3V5VSBPass/Fail
10% load14.00 mV11.10 mV12.70 mV11.20 mVPass
20% load13.40 mV12.20 mV13.40 mV11.10 mVPass
30% load13.40 mV12.60 mV13.60 mV11.90 mVPass
40% load15.70 mV12.80 mV13.80 mV13.30 mVPass
50% load18.10 mV13.40 mV15.10 mV15.10 mVPass
60% load19.30 mV13.70 mV15.70 mV15.50 mVPass
70% load21.80 mV14.70 mV17.40 mV16.70 mVPass
80% load24.80 mV15.50 mV22.00 mV20.70 mVPass
90% load31.40 mV16.60 mV20.40 mV20.90 mVPass
100% load47.10 mV22.30 mV22.50 mV25.60 mVPass
110% load51.90 mV23.50 mV23.20 mV26.00 mVPass
Crossload 122.80 mV20.30 mV24.30 mV09.70 mVPass
Crossload 247.20 mV21.50 mV16.60 mV19.60 mVPass

Fan Speed/Noise (115v)

Load (115v)RPMNoise
20w load62511.7 dB
40w load64612.3 dB
60w load66815.4 dB
80w load69915.8 dB
10% load70915.9 dB
20% load74918.7 dB
30% load78820.6 dB
40% load84424.3 dB
50% load90025.4 dB
60% load98928.4 dB
70% load109431.7 dB
80% load124336.9 dB
90% load141239.5 dB
100% load157142.0 dB
110% load173644.3 dB
Crossload 1115534.8 dB
Crossload 2149941.8 dB

Fan Speed/Noise (230v)

Load (230v)RPMNoise
20w load66815.4 dB
40w load68915.4 dB
60w load70815.9 dB
80w load73016.9 dB
10% load73116.9 dB
20% load77020.2 dB
30% load78920.8 dB
40% load84624.7 dB
50% load89625.8 dB
60% load97228.2 dB
70% load107830.9 dB
80% load122536.7 dB
90% load136438.5 dB
100% load152741.7 dB
110% load172944.3 dB
Crossload 1112932.7 dB
Crossload 2151441.7 dB

Hold-up Time (230v)

Hold-up time (ms)16,6
AC loss to PWR-OK hold up time (ms)14,3
PWR_OK inactive to DC loss delay (ms)2,3


Sadly, this unit has sold poorly in the past few years, despite its great build quality and solid part choice, and will soon be taken out of the market. But until then, you can find them cheap at various retailers. I bought this unit myself for just fifty euros. If you have the chance and need a cheap unit with the build quality of the average midrange 80+ gold unit, I would highly recommend it. But if you’re reading this review once the unit is discontinued or you want to see alternatives to it, we left a few below.

Buy Corsair CX-F


Budget (w/o RGB)higher end (w/o RGB)higher end w/ RGB

Corsair CX/Asus TUF

Buy Corsair CX Buy Asus TUF
  • LLC resonant
  • Widely reviewed platform
  • Higher than claimed efficiency
  • CX is soon going out of production
  • TUF isn't as widely reviewed
  • Non-modular
  • Not the quietest
  • OEM: Greatwall (both), CWT (CX)
  • Efficiency rating: 80+ bronze*, ETA Silver
  • Warranty: 5 years
  • Modularity: non-modular
  • * = CX650 meets silver, but is marketed as bronze


Adata XPG Pylon

Buy XPG Pylon
  • Widely reviewed
  • High efficiency for double forward
  • More likely to whine with higher end GPUs
  • Non-modular
  • Not the quietest
  • Efficiency rating: 80+ Bronze, ETA Silver
  • Warranty: 5 years
  • Modularity: non-modular


Cooler Master MWE V2 Bronze

Buy MWE V2 Bronze
  • LLC resonant
  • Widely reviewed platform
  • Higher than claimed efficiency
  • Early revisions showed high low-load ripple
  • Has a 230v only version
  • Not the quietest
  • OEM: Gospower
  • Efficiency rating: 80+ Bronze, ETA Silver
  • Warranty: 5 years
  • Modularity: non-modular

Bitfenix Formula Gold

Buy Formula Gold
  • Widely reviewed
  • Quiet
  • Very efficient
  • FDB fan
  • Multirail OCP
  • EPS connectors are on the same cable
  • Non-modular
  • Efficiency rating: 80+ Gold, ETA Platinum
  • Warranty: 5 years
  • Modularity: non-modular


  • Widely reviewed
  • Quiet
  • Very efficient
  • 2021 version is louder than the rest
  • No multirail OCP
  • OEM: CWT
  • Efficiency rating: 80+ gold, ETA gold
  • Warranty: 10 years
  • Modularity: fully modular


Enermax Revolution DF

Buy Revolution DF
  • Widely reviewed platform
  • Quiet
  • Very efficient
  • Multirail OCP
  • 3 years less warranty compared to other high-end alternatives
  • Efficiency rating: 80+ Gold
  • Warranty: 7 years
  • Modularity: fully modular

Superflower Leadex III ARGB

Buy Leadex III ARGB
  • Widely reviewed
  • ARGB fan
  • Quiet
  • High Efficiency
  • Compatible with EVGA pinout (non-GQ)
  • Early revisions had some odd voltage drops
  • No multirail OCP
  • OEM: Super Flower
  • Efficiency rating: 80+ gold, ETA gold
  • Warranty: 10 years
  • Modularity: fully modular


Thermaltake Toughpower GF1 ARGB

  • Widely reviewed
  • ARGB fan
  • Quiet
  • High efficiency
  • Thermaltake has tried to replace this with GF2 ARGB
  • No multirail OCP
  • Efficiency rating: 80+ gold
  • Warranty: 10 years
  • Modularity: fully modular

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