Memonex MOD EX 600W Power Supply Review

paulktreg - 2010-03-12 12:18:17 in Power Supplies
Category: Power Supplies
Reviewed by: paulktreg   
Reviewed on: April 5, 2010
Price: $47.00

Introduction:

Memonex is a manufacturing and marketing company, which operates predominantly in the Middle Eastern markets.  However, with offices now in Canada, things may be about to change.  I'm sure most people won't be familiar with the name, but they all have to start somewhere, so let's reserve judgment until the testing stage is complete. Memonex specializes in memory related products that include flash memory cards, USB flash drives, card readers, ram modules, solid state and hard disk drives. They also offer a small range of computer power supplies that range from the Silent Ex 320W to the MOD EX 1000W units.

This time around OCC is taking a look at the Memonex MOD EX 600W power supply and putting it through its paces so let's move on and have a closer look.

Closer Look:

The packaging of the Memonex MOD EX 600W, when compared to the higher end of the power supply market, is on the small side, which immediately tells you it's not going to be the best. The red and black themed box doesn't look too bad and is quite striking. The top of the box carries a photograph of the power supply that appears on flames - perhaps not the way most manufacturers would depict their products? The Memonex logo, along with small pictorial representations of some of the main features and the power supply wattage, completes the top cover. The base of the box carries a comprehensive feature list, consisting of pictorial representations accompanied by a descriptive sentence or two for each feature.

 

 

 

 

 

 

 

 

 

 

 

 

 

The front and rear faces of the packaging carry the Memonex trademark along with a large red flaming MOD EX logo. The Memonex MOD EX 600W power supply, according to information supplied in the bottom corners of the front and rear faces, gives a real output power of 600W and is compliant with the ATX12V V2.3 specification.

 

 

Memonex trademarks, the MOD EX logo, and real output 600W are shown on both end panels along with the specification table and pictorial representations of some of the main features.

 

 

Lift the lid and the user manual is sat on top of a bubble wrapped power supply with cables and power cord tucked down the sides.

 

 

On the left, the bubble wrapped power supply along with a photograph of the box contents consisting of the modular cables, the user manual, and a power cord.

 

 

The packaging of the Memonex MOD EX 600W power supply is very basic, as are the enclosed accessories, let's move on and see how well it performs.

Closer Look :

The Memonex MOD EX 600W power supply is finished in a very high-gloss, metallic-black paint that shows every fingerprint and scratches very easily.  Care is needed when handling.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The rear face of the Memonex MOD EX 600W power supply shows the hexagonal-holed exhaust grill that occupies most of the available space for maximum area. The rear face also carries the IEC mains input connector, mains on/off switch, and a blanked off voltage selector switch from back in the days when 230VAC or 110VAC were the only options. The photograph of the front face of the power supply shows the captive cables that are fully sleeved all the way into the exit port and a bank of four modular cable connectors. The connectors are all identical and any modular cable can be plugged into any connector, which means all the rails are present. The obvious disadvantage to this configuration is the modular PCI-E cable that will not have individual connections for the three yellow 12V and three black 0V wires (because the 3V3 and 5V rails have taken two of the six available connectors) and has led to doubling up of wires on the modular cable.

 

 

The high gloss finish of the Memonex MOD EX 600W is illustrated by the reflection of a penny on one side of the power supply with the specification label on the opposite face.

 

 

The Memonex MOD EX 600W power supply uses a pale gold grill to cover the cooling fan which carries a Memonex logo at its center. Nothing of note to see on the underside, except the printed circuit board mounting points.

 

 

The Memonex MOD EX 600W power supply has two captive cables, the 20+4 motherboard and a 4+4 pin ATX12V/EPS12V cable, which are neatly sleeved all the way into the power supply. The modular cable set build quality is good but with only one PCI-E cable carrying a 6 pin and a 6+2 pin connector and only two SATA plugs the choices are a little limited.

 

 

Next, the 120mm clear plastic cooling fan is shown.  It is manufactured by Globe, model number B1202512L.  The fan is rated at 12VDC 0.26A and fitted with blue LEDs. The printed circuit board layout is tidy, but there are no visible markings that point to any specific manufacturer.

 

 

The mains input filter, so often lacking or non-existent on low end generic units, contains all the necessary components for an effective noise filter. The electrolytic capacitors are all rated at the more welcome 105°C working temperature, apart from the main Capxon capacitor rated at 85°C which is often the case.

 

 

The build quality of the Memonex MOD EX 600W is pretty good, but it is let down by poor packaging and a basic set of accessories that doesn't even include any power supply mounting screws or cable ties.  However, how will it perform is really the question to ask!

Specification:

 

Review Sample: Memonex MOD EX 600W Power Supply, Part Number MXP600MOD-EXG.


Ratings Table:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Memonex MOD EX 600W Power Supply Specification Table
AC Input
100-240VAC, 10-6A, 60/50Hz
DC Output
+3.3V
+5.0V
+12V1
+12V2
-12V
+5VSB
Max Current
20A
22A
24A
24A
0.3A
2.5A
45A
Max Power
130W
455W
3.6W
12.5W
585W
15W
Total Power
600W

 

System Protection:

If the power supply latches into shutdown stage (when over current, over voltage or short circuit protection is working), the power supply shall return to normal operation only after the fault has been removed and PS-ON is reset for a minimum of 1 second or by removing AC power cord and reconnect it.

Over Current Protection
The power supply DC outputs are protected from supplying output current above the maximum ratings and when output power is between 110%~150%. With the exception of the +5VSB output, all DC outputs are latched off in the event of an over-current event on any of the DC outputs. In the event of a short circuit on any output, except the +5VSB rail, all outputs are disabled and remain disabled until the power supply is powered off and back on. The +5VSB rail will recover upon removal of the over current condition.

Over Voltage Protection
The over voltage protection sense circuitry and reference reside in packages that are seperate and distinct from the regulator control circuitry and reference. No single point fault is able to cause a sustained over voltage condition on any or all outputs. The power supply provides latch mode over voltage protection defined as:
+5V output is between 5.8V to 6.3V
+12V output is between 14.0V to 17.0V
+3.3V output is between 3.6V to 4.2V

Short Circuit Protection
The power supply DC outputs are protected from damage due to faults, when any output shorts to ground. In the event of a short circuit on any output, all outputs shall be disabled and remain disabled until the power supply is powered off and back on. The 5VSB rail will recover upon removal of the over current.

 

Safety & Agency Approvals:

CE, CB, TUV, FCC & RoHS.

 

Power Supply Weight:

 

Power Supply Weight
Manufacturer/Model
Weight
Memonex MOD EX 600W
1.8kg
4.0lbs

 

Power Supply Connectors:

 

Memonex MOD EX 600W Power Supply Connectors
24 Pin Motherboard
Captive
1
ATX12V/EPS12V 4+4 Pin
Captive
1
Peripheral 4 Pin
Modular
6
FDD
Modular
1
SATA Power
Modular
2
6 Pin PCI-E
Modular
1
6+2 Pin PCI-E
Modular
1

 

 

Power Supply Cable Lengths:

 

Memonex MOD EX 600W Power Supply Connector Cable Lengths
Captive
PSU > 19" > 24 Pin Motherboard
1
Captive
PSU > 19" > 4+4 Pin ATX12V/EPS12V
1
Modular
PSU > 19" > Peripheral > 6" > Peripheral > 6" > Peripheral > 6" > FDD
1
Modular
PSU > 19" > Peripheral > 6" > Peripheral > 6" > Peripheral
1
Modular
PSU > 19" > SATA > 6" > SATA
1
Modular
PSU > 19" > PCI-E 6" Pin > 6" > PCI-E 6+2 Pin
1

 

Features:

Exactly as printed on the box.

Testing:

For more information on how we test our power supplies, please browse our testing methodology.

Electrical Safety:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Electrical Safety Test Class 1
Manufacturer/Model
Pass/Fail
Memonex MOD EX 600W
Pass

 

Short Circuit Protection:

I short circuited the 3V3, 5V0 and the 12V rail in turn. The power supply did shut down, and once the short was removed and the unit switched off for at least one second, resumed normal operation. Although, listed here at the beginning of the testing section, I tend to leave this test until the very end, in case it doesn't quite go to plan.

 

DC Output Voltage Load Regulation:

 

Mains Input Voltage 110VAC

 

 

Memonex MOD EX 600W Power Supply DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU DC Rail
Measured Voltage(V)
3V3
3.40
5V0
5.07
+12V1
12.23
+12V2
12.23
-12V
11.91
5VSB
4.98
Total PSU DC Loading = Single WD800 IDE HDD

 

Memonex MOD EX 600W Power Supply DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
3.27
11.12
3.40
3.135 – 3.465
Pass
+5V
4.81
24.30
5.05
4.75 – 5.25
Pass
+12V1
2.58
31.78
12.32
11.4 – 12.6
Pass
+12V2
5.06
62.34
12.32
11.4 – 12.6
Pass
-12V
0.36
4.30
11.95
10.8 – 13.2
Pass
+5VSB
2.05
10.19
4.97
4.75 – 5.25
Pass
Total PSU DC Loading = 144W (24% of Rated Maximum Output Power)

 

Memonex MOD EX 600W Power Supply DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
8.72
29.47
3.38
3.135 – 3.465
Pass
+5V
9.89
49.45
5.00
4.75 – 5.25
Pass
+12V1
8.29
101.80
12.28
11.4 – 12.6
Pass
+12V2
10.60
130.17
12.28
11.4 – 12.6
Pass
-12V
0.35
4.20
12.00
10.8 – 13.2
Pass
+5VSB
2.02
10.00
4.95
4.75 – 5.25
Pass
Total PSU DC Loading = 325W (54% of Rated Maximum Output Power)

 

Memonex MOD EX 600W Power Supply DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
14.06
47.24
3.36
3.135 – 3.465
Pass
+5V
14.97
74.40
4.97
4.75 – 5.25
Pass
+12V1
13.71
165.62
12.08
11.4 – 12.6
Pass
+12V2
24.07
290.76
12.08
11.4 – 12.6
Pass
-12V
0.36
4.34
12.06
10.8 – 13.2
Pass
+5VSB
1.98
9.72
4.91
4.75 – 5.25
Pass
Total PSU DC Loading = 592W (99% of Rated Maximum Output Power)

 

Mains Input Voltage 230VAC

 

Memonex MOD EX 600W Power Supply DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU DC Rail
Measured Voltage(V)
3V3
3.40
5V0
5.07
+12V1
12.23
+12V2
12.23
-12V
11.91
5VSB
4.98
Total PSU DC Loading = Single WD800 IDE HDD

 

Memonex MOD EX 600W Power Supply DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
3.27
11.12
3.40
3.135 – 3.465
Pass
+5V
4.78
24.14
5.05
4.75 – 5.25
Pass
+12V1
2.60
32.06
12.33
11.4 – 12.6
Pass
+12V2
5.18
63.82
12.32
11.4 – 12.6
Pass
-12V
0.36
4.30
11.95
10.8 – 13.2
Pass
+5VSB
2.05
10.21
4.98
4.75 – 5.25
Pass
Total PSU DC Loading = 146W (24% of Rated Maximum Output Power)

 

Memonex MOD EX 600W Power Supply DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
8.59
29.03
3.38
3.135 – 3.465
Pass
+5V
9.76
48.80
5.00
4.75 – 5.25
Pass
+12V1
8.18
100.45
12.28
11.4 – 12.6
Pass
+12V2
10.69
131.17
12.27
11.4 – 12.6
Pass
-12V
0.35
4.20
12.00
10.8 – 13.2
Pass
+5VSB
2.02
10.00
4.95
4.75 – 5.25
Pass
Total PSU DC Loading = 324W (54% of Rated Maximum Output Power)

 

Memonex MOD EX 600W Power Supply DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
13.82
46.43
3.36
3.135 – 3.465
Pass
+5V
14.97
74.40
4.97
4.75 – 5.25
Pass
+12V1
13.73
165.86
12.08
11.4 – 12.6
Pass
+12V2
24.04
290.16
12.07
11.4 – 12.6
Pass
-12V
0.36
4.34
12.06
10.8 – 13.2
Pass
+5VSB
1.98
9.72
4.91
4.75 – 5.25
Pass
Total PSU DC Loading = 590W (98% of Rated Maximum Output Power)

 

The Memonex MOD EX 600W produced a pretty good set of figures for DC output load regulation and all the rails kept well within the limits set down by the ATX12V V2.2 specification. The 12V rail did fall more than other high end power supplies tend to do, but it stayed within the specification.  The -12V rail produced what are probably the best set of results seen for some time and it actually managed to attain -12V or thereabouts at all load levels. No problems here, so let's move on.

Testing:

Efficiency and Power Factor:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Memonex MOD EX 600W Power Supply Power Factors & Efficiency
Supply = 110VAC50Hz
DC Load (W)
AC Load (W)
PF
Efficiency (%)
Pass/Fail
WD800 HDD
48
0.90
N/A
N/A
144
179
0.99
80
Pass
325
403
1.00
81
Pass
592
805
0.99
73
Pass

 

Memonex MOD EX 600W Power Supply Power Factors & Efficiency
Supply = 230VAC/50Hz
DC Load (W)
AC Load (W)
PF
Efficiency (%)
Pass/Fail
WD800 HDD
47
0.69
N/A
N/A
146
174
0.97
84
Pass
324
390
0.99
83
Pass
590
756
0.99
78
Pass

 

The efficiency of the Memonex MOD EX 600W power supply is pretty good at low and medium loads, but falls to a dissapointing 73% on full load with a 110VAC mains supply. The power factor levels are amongst the best I have seen and especially good on 230VAC, when compared to many high end power supplies. The efficiency and power factor levels do meet the requirements of the ATX12V V2.2 specification for a power supply in this class, so let's move on and take a look at the DC quality.

 

AC Ripple On DC Outputs:

 

I have consistently found the AC ripple levels on the DC rails to be more or less equal with a 110VAC or 230VAC mains supply. The results given below are for 230VAC only but I will continue to check the levels at 110VAC during testing and publish them below if there are any significant differences.

 

AC Ripple On +3V3 Rail at 230VAC

Oscilloscope settings: Amplitude = 5mv/div, Timebase = 5uS/div

 

AC Ripple On +5V0 Rail at 230VAC

Oscilloscope settings: Amplitude = 5mv/div, Timebase = 5uS/div

 

AC Ripple On +12V Rail at 230VAC

Oscilloscope settings: Amplitude = 10mv/div, Timebase = 5uS/div

 

AC Ripple On -12V Rail at 230VAC

Oscilloscope settings: Amplitude = 10mv/div, Timebase = 5uS/div

 

AC Ripple On +5VSB Rail at 230VAC

Oscilloscope settings: Amplitude = 20mv/div, Timebase = 5uS/div

 

Memonex MOD EX 600W Power Supply AC Ripple/Noise
Supply = 230VAC/50Hz
DC Rail
+3V3
+5V0
+12V
-12V0
+5VSB
ATX12 Max (mV p-p)
50
50
120
120
50
Ripple (mV p-p)
30
40
50
70
50
Pass/Fail
Pass
Pass
Pass
Pass
Pass

 

The Memonex MOD EX 600W power supply met all the requirements of the ATX12V V2.2 specification for ripple/noise. The levels are a little higher than some high end power supplies and, 50mV on the 12V rail is quite acceptable, whilst 50mV on the +5VSB is almost - but not quite - a failure.

Testing:

Temperature, Noise Levels and Fan Speeds:

 

I am not going to give a pass or fail in this section, as the ATX12V V2.2 does not really have any references on which to base a decision.

Temperatures are purely for information only, as there are too many variables involved when installed in a case, which, by the way, it wasn't. Ambient temperature, processor cooling efficiency, and case cooling fans all play their part on the temperature of the air entering the power supply, and, consequently, the temperature of the air leaving it. No valid conclusions can be made from this test.

 

 

 

 

 

 

 

 

 

 

 

 

 

Memonex MOD EX 600W Power Supply
Temperature & Fan Speeds @ 110/230VAC
DC Loading(W)
Temp In (°C)
Temp Out (°C)
Δ Temp (°C)
Fan Speed (RPM)
WD800 HDD
N/A
N/A
N/A
905/903
144/146
22.2/21.9
27.2/25.6
5.0/3.7
967/900
325/324
22.2/22.1
32.1/30.6
9.9/8.5
1209/1266
592/590
22.4/22.1
29.3/28.0
6.9/5.9
1763/1757

 

 

The Memonex MOD EX 600W power supply performance in this section was certainly on par with some high end power supplies. Temperatures at all times remained low and fan noise only became a problem when the power supply was fully loaded and speeds hit 1700RPM. The noise certainly wasn't irritating, but it could be to some users. The cooling fan on Memonex MOD EX 600W power supply is lit using four bright blue LEDs that can't be switched off, which may be a problem for some users, but it does look quite effective.

Conclusion:

 

Price Per the Watt:

Power Supply Memonex MOD EX 600W at $47.00* = $0.08/Watt (03-2010)

* Current selling price in China. (Power supply not available in the USA or Europe).

The Memonex MOD EX 600W power supply performed very well and certainly exceeded expectations, but I would not refer to it as "high end". The DC voltage load regulation was actually quite good and it easily supplied the full 600W of DC power with noise/ripple levels that met the requirements of the ATX12V V2.2 specification. The power supply packaging carries an 80 Plus logo, or at least a pretty good representation of it, but the power supply just doesn't meet with 73% efficiency at full load on 110VAC, which is a long way from the required 80%. It certainly isn't certified, according to the 80 Plus Org website, and going of its performance, it just wouldn't make the grade. The arrangement of the modular cable connectors is, to say the least, unconventional with any modular cable plugging into any of the four available six-way modular cable sockets. This means all the rails, 3V3, 5V0 and 12V have to be available on all four of the power supply six-way modular cable sockets. This being the case, the 3V3 and 5V0 rails take two of the six available positions leaving only two each for the 0V (ground) and +12V rails, which are expected to supply the single PCI-E modular cable with one 6-pin and one 6+2 pin connector. It's possible to connect up a single high end graphics card or, as the accompanying literature states, dual graphics card crossfire or SLI systems.  The power supply is certainly capable of powering the card(s), but are the four pins of the modular cable socket, that worst case could be supplying - via a single modular cable - fourteen pins at the graphics card (s), capable enough? It's pretty obvious here that the modular cable socket could be overloaded.

The Memonex MOD EX 600W power supply performed quite well, but the arrangement of the modular cables and power supply sockets is flawed and, for this reason alone, it shouldn't be used with a single high end graphics card or dual card configurations. The inclusion of only two SATA power connectors will severely limit its usefulness, especially in the enthusiast market, two just isn't enough! The electrical performance of the Memonex MOD EX 600W was quite good, but it has poor efficiency at full load.  It's certainly capable of powering an internet or office PC with a single PCI-E connected mid range graphics card, but for anything requiring more power, especially on the PCI-E front, the Memonex isn't recommended.

 

Pros:

 

Cons: