Mushkin Joule 1000W Power Supply Review

paulktreg - 2008-10-11 17:04:31 in Power Supplies
Category: Power Supplies
Reviewed by: paulktreg   
Reviewed on: June 6, 2010
Price: $229.99

Introduction:

Mushkin Enhanced, founded in 1994, are located at the base of the Rocky Mountains in Denver, Colorado. They are probably best known for their wide range of memory modules, which include their highly regarded performance Ridgeback and Redline DDR3 modules through to, dare I even mention the word, a full range of Apple compatible memory products. Mushkin Enhanced don’t just make memory and also offer the Mulholland Flash Drive, Callisto and Io Solid State Drives and a small range of power supplies that, according to their website, provide clean and reliable power.

The Mushkin Enhanced power supply range although limited consists of the 500W and 600W Volta and the 1000W and 1200W Joule which between them offer a spread of output powers and features to suit most applications. I have already reviewed the 600W Volta power supply here on OCC and it performed very well, so this time around it’s the turn of the 1000W Joule. Let’s have a closer look and see how well it performs.

 

Closer Look:

The packaging of the Mushkin Enhanced Joule 1000W power supply is simple but effective and follows the green, black and white theme used by the Volta range. The front of the box bears the Mushkin Enhanced trademark and power supply type along with a picture of electricity pylons being struck by negatively imaged lightening and three wind turbines thrown in for good measure. Is this a representation of the available power with some eco-friendly design features included? The rear face of the box carries a photograph of the Joule power supply on a simple green background.

 

 

 

 

 

 

 

 

 

 

The top of the box shows a large Mushkin Enhanced logo against a plain black background and the base, with the exception of a small production barcode, is plain white.

 

 

One side of the box carries all the technical information, which includes a specification table, connector types and quantities, box contents and feature list. The other face carries a paragraph explaining the benefits of using a high quality power supply, stability and reliability being the major points, along with a paragraph explaining the Mushkin quality ethos and some of the power supply main features, including a five year warranty.

 

 

Under the lid is a black accessories box, which sits on top of the bubble-wrapped power supply. The captive cables are neatly stashed at the side of the power supply, along with the power cord.

 

 

Bubble wrapped power supply and the full box contents which include the modular cable set, power cord, user manual, five coloured Velcro straps, two black cable ties and power supply mounting screws.

 

 

Simply but adequately packed power supply, with everything needed for a successful and tidy installation. All’s well so far, so let’s move on.

Closer Look :

The Mushkin Enhanced Joule 1000W power supply is finished in a satin, slightly textured, black paint that does a great job of hiding finger prints and scratches.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The exhaust grill on the Joule is a large diamond mesh design that occupies as much space as possible for maximum airflow. A standard 10A 250Vac IEC mains input connector is used for the power cord connection along with a small rocker switch for mains input isolation. There are two slide switches on the rear panel - one that controls fan lighting colour, red, blue, and green or off (none) and another for multi or single 12V rail operation. There are two valid reasons for fitting a 1000W power supply. One, because you can (the word overkill does not exist in my dictionary), or two, because it’s needed. If it’s needed then it can only be for a powerful SLI or Crossfire configuration for which, in my opinion, the single 12V rail configuration is the way to go and that’s the way the testing will be performed. The opposite face carries the modular cable connections, black for peripherals and blue for PCI-E power. The captive cables, sleeved all the way into the enclosure, enter the power supply via a plastic grommet-protected port.

 

 

Not much to see on the sides, apart from six auxiliary ventilation slots.

 

 

The specification label is attached to the underneath face of the power supply along with a couple of production test stickers. The 120mm clear plastic bladed fan is protected with an internally mounted satin black grill with the Mushkin Enhanced trademark at its centre.

 

 

The Mushkin Enhanced Joule 1000W power supply comes with a captive cable set consisting of a 4+4 pin ATX12V/EP12V, two 6+2 PCI-E and a 20/24 pin motherboard connector. The modular cables aren’t bound with wire wraps, which means you get a set of straight cables that will be easier to neatly route inside the case. The colour coding is continued throughout the cable set plugs, with black for peripherals, blue for PCI-E and sky blue for the ATX12V/EPS12V connectors.

 

 

The 120mm cooling fan carries an HS brand mark, which could be the Taiwanese company Hang Sheng, but a search of the part number, A1225H12S, produced no results. The fan is manufactured from clear plastic, rated at 12V 0.45A and fitted with light emitting diodes, whose colour can be selected or switched off via the rear panel slide switch. The printed circuit board layout is a little cramped, but this is to be expected for a 1000W power supply and a quick search using the UL number cites Topower as the manufacturer.

 

 

The Mushkin Enhanced Joule 1000W utilises a twin 12V rail design as indicated by the two main transformers. This is not uncommon these days in high-powered units. The electrolytic capacitors are all rated at 105°C and quality components by Teapo.

 

 

The build quality of the Mushkin Enhanced Joule 1000W power supply is on the whole pretty good and in combination with one or two nice features, adequate packaging and a good set of accessories, looks good so far, so let’s move on and have a look at the specifications and see how well it performs.

Specifications:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ratings Table:

Mushkin Enhanced Joule 1000W Power Supply Specifications
AC Input
115-240VAC     15-10A     50-60Hz
DC Output
3V3
5V
12V1
12V2
12V3
12V4
12V5
12V6
-12V
+5VSB
Maximum Load
30A
30A
19A
19A
19A
19A
19A
19A
1A
6A
Maximum
Combined
Wattage
200W
912W(76A)
12W
30W
960W
40W
1000

 

DC Output Voltage Regulation:

Mushkin Enhanced Joule 1000W Power Supply DC Voltage Regulation
DC Output Voltage Regulation
DC Rail
Regulation Range
Ripple/Noise
Load
+3V3
+/- 5%
3.14-3.47V
<50mVp-p
At 100% Full Load
+5V
+/- 5%
4.75-5.25V
<50mVp-p
+12V
+/- 5%
11.4-12.6V
<120mVp-p
-12V
+/- 10%
10.8-13.2V
<120mVp-p
-5V
+/- 10%
4.5-5.5V
<100mVp-p
 
+5VSB
+/- 5%
4.75-5.25V
<50mVp-p
 

 

DC Output Capacitive Load & Transient Response:

Mushkin Enhanced Joule 1000W Power Supply DC Output Capacitive Load & Transient Response
DC Output Capacitive Load & Transient Response
DC Rail
Capacitive Load uF
Transient Response
Maximum Step Size
+3V3
6000
30% of rated output amps
+5V
10,000
30% of rated output amps
+12V
20,000
30% of rated output amps
-12V
350
-
-5V
-
-
+5VSB
350
-

 

System Protection:

Mushkin Enhanced Joule 1000W Power Supply Protection Circuit
Protection Circuit
Protection Against
+3V3
+5V
+12V
Over-Voltage
OVP
3.6~4.2V
5.8~6.3V
14~17V
Over Current
OCP
110 – 150%
Short Circuit
SCP
< 0.1 ohm
HV Discharge
ESD
2.2~3.0kV

 

Safety & Agency Approvals:

UL/CUL, TUV, CB, BSMI, CCC, FI, CE & FCC.

 

Power Supply Weight:

 

Power Supply Weight
Manufacturer/Model
Weight
Mushkin Enhanced Joule 1000W
3.0kg
6.6lbs

 

Power Supply Connectors:

 

Mushkin Enhanced Joule 1000W Connectors
20+4 Pin Motherboard
Captive
1
ATX12V/EPS12V 4+4 Pin
Captive
1
PCI-E 6+2 Pin
Captive
2
EPS12V 8 Pin
Modular
1
PCI-E 6+2 Pin
Modular
4
SATA Power
Modular
6
Peripheral 4 Pin
Modular
5
FDD
Modular
1

 

Power Supply Cable Lengths:

 

Mushkin Enhanced Joule 1000W Connector Cable Lengths
Captive
PSU > 21" > 20+4 Pin Motherboard
1
Captive
PSU > 26" > ATX12V/EPS12V 4+4 Pin
1
Captive
PSU > 24" > PCI-E 6+2 Pin
2
Modular
PSU > 21" > EPS12V 8 Pin
1
Modular
PSU > 21" > PCI-E 6+2 Pin
4
Modular
PSU > 21" > SATA > 6" > SATA
1
Modular
PSU > 21" > SATA > 6" > SATA > 6" > SATA > 6" > SATA
1
Modular
PSU > 21" > Peripheral > 6" > Peripheral
1
Modular
PSU > 21" > Peripheral > 6" > Peripheral > 6" > Peripheral > 6" > FDD
1

 

Features:

 

 

All information courtesy of Mushkin @ http://www.mushkin.com/Power-Supplies/Joule/MKNPS1000-A.aspx

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
Mushkin Enhanced Joule 1000W
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

 

 

Mushkin Enhanced Joule 1000W
DC Output Voltage Load Regulation
Supply = 110Vac/50Hz
PSU DC Rail
Measured Voltage(V)
3V3
3.39
5V0
5.06
+12V
12.18
-12V
11.17
5VSB
5.11
Total PSU Loading = 0W (0% of Rated Maximum Output Power)

 

Mushkin Enhanced Joule 1000W
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
8.67
29.22
3.37
3.135 – 3.465
Pass
+5V
4.82
24.10
5.00
4.75 – 5.25
Pass
+12V
10.28
124.80
12.14
11.4 – 12.6
Pass
-12V
0.33
3.75
11.37
10.8 – 13.2
Pass
+5VSB
2.16
10.71
4.96
4.75 – 5.25
Pass
Total PSU Loading = 193W (19% of Rated Maximum Output Power)

 

Mushkin Enhanced Joule 1000W
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
8.64
29.12
3.37
3.135 – 3.465
Pass
+5V
9.84
49.10
4.99
4.75 – 5.25
Pass
+12V
32.12
389.62
12.13
11.4 – 12.6
Pass
-12V
0.34
3.95
11.61
10.8 – 13.2
Pass
+5VSB
2.05
10.15
4.95
4.75 – 5.25
Pass
Total PSU Loading = 482W (48% of Rated Maximum Output Power)

 

Mushkin Enhanced Joule 1000W
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
13.65
45.86
3.36
3.135 – 3.465
Pass
+5V
14.89
73.85
4.96
4.75 – 5.25
Pass
+12V
68.08
822.41
12.08
11.4 – 12.6
Pass
-12V
0.35
4.17
11.92
10.8 – 13.2
Pass
+5VSB
2.13
10.39
4.88
4.75 – 5.25
Pass
Total PSU Loading = 957W (96% of Rated Maximum Output Power)

 

Mains Input Voltage 230VAC

 

 

Mushkin Enhanced Joule 1000W
DC Output Voltage Load Regulation
Supply = 230Vac/50Hz
PSU DC Rail
Measured Voltage(V)
3V3
3.39
5V0
5.06
+12V
12.19
-12V
11.17
5VSB
5.11
Total PSU Loading = 0W (0% of Rated Maximum Output Power)

 

Mushkin Enhanced Joule 1000W
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
8.66
29.18
3.37
3.135 – 3.465
Pass
+5V
4.83
24.15
5.00
4.75 – 5.25
Pass
+12V
10.27
124.68
12.14
11.4 – 12.6
Pass
-12V
0.33
3.75
11.37
10.8 – 13.2
Pass
+5VSB
2.16
10.71
4.96
4.75 – 5.25
Pass
Total PSU Loading = 192W (19% of Rated Maximum Output Power)

 

Mushkin Enhanced Joule 1000W
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
8.56
28.85
3.37
3.135 – 3.465
Pass
+5V
9.71
48.45
4.99
4.75 – 5.25
Pass
+12V
32.22
390.83
12.13
11.4 – 12.6
Pass
-12V
0.34
3.95
11.61
10.8 – 13.2
Pass
+5VSB
2.05
10.13
4.94
4.75 – 5.25
Pass
Total PSU Loading = 482W (48% of Rated Maximum Output Power)

 

Mushkin Enhanced Joule 1000W
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
13.97
46.80
3.35
3.135 – 3.465
Pass
+5V
14.91
73.95
4.96
4.75 – 5.25
Pass
+12V
67.91
821.03
12.09
11.4 – 12.6
Pass
-12V
0.35
4.17
11.93
10.8 – 13.2
Pass
+5VSB
2.13
10.39
4.88
4.75 – 5.25
Pass
Total PSU Loading = 956W (96% of Rated Maximum Output Power)

 

The Mushkin Enhanced Joule 1000W power supply DC output voltage load regulation is as good as most power supplies in this class, as exhibited by the almost horizontal lines on the graph for the 3V3, 5V0 and 12V rail. The -12V rail never actually reached -12V and the 5VSB rail was a little low, but everything remained well within the limits set down by the ATX12V V2.2 specification. No problems here, so let's move on.

Testing:

Efficiency and Power Factor:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mushkin Enhanced Joule 1000W
Output & Efficiency @ 110Vac
DC Load (W)
AC Load (W)
PF
Efficiency (%)
Pass/Fail
0
12
0.69
N/A
N/A
193
240
0.96
80
Pass
482
575
0.99
84
Pass
957
1238
1.00
77
Pass

 

Mushkin Enhanced Joule 1000W
Output & Efficiency @ 230Vac
DC Load (W)
AC Load (W)
PF
Efficiency (%)
Pass/Fail
0
11
0.34
N/A
N/A
192
235
0.88
82
Pass
482
563
0.93
86
Pass
956
1188
0.96
80
Pass

 

The Mushkin Enhanced Joule 1000W power supply efficiency isn't quite up there with other power supplies in this class, with a dip to 77% on 110Vac at 957W loading; it's very close but it makes no claims to the contrary. The user manual claims efficiencies of 85% and 87% for mains input voltages of 115Vac and 230Vac respectively when subjected to a typical load. What is a typical load? It's open to interpretation, but I feel it's reasonable to assume this power supply would "typically" be installed in a fairly high specification gaming rig with a single very high-end or dual graphics card configuration requiring somewhere in the region of 400W~600W. Power supply peak efficiency is almost universally reached somewhere in the region of 50% of its maximum rated DC output power, a level at which the Mushkin Enhanced Joule 1000W power supply exhibited efficiencies of 84% (115Vac) and 86% (230Vac) which are very close to the levels given in the user manual. Once again, like the Mushkin Enhanced Volta 600W, it does what it says on the tin.

Power factor levels and efficiency easily meet the requirements of the ATX12V V2.2 specification and it just goes to prove that you can still find efficient power supplies that don't carry 80 Plus certification. I appreciate it wouldn't pass muster with the 80 Plus organisation based on these figures, but how many PC enthusiasts would run this unit at, or near full power? The Mushkin Enhanced Joule 1000W exhibits great mid-range efficiency but it will lose points for the below-par efficiency at full load on 110Vac.

 

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/noise on the +3V3 rail at 230VAC

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

 

AC ripple/noise on the +5V0 rail at 230VAC

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

 

AC ripple/noise on the +12V rail at 230VAC

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

 

AC ripple/noise on the -12V rail at 230VAC

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

 

AC ripple/noise on the +5VSB rail at 230VAC

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

 

Mushkin Enhanced Joule 1000W
AC Ripple/Noise
DC Rail
+3V3
+5V0
+12V
-12V0
+5VSB
ATX12 Max (mV p-p)
50
50
120
120
50
Ripple (mV p-p)
30
40
30
65
45
Pass/Fail
Pass
Pass
Pass
Pass
Pass

The Mushkin Enhanced Joule 1000W power supply produced a reasonable set of results in this section, with all the AC ripple/noise levels meeting the requirements of the ATX12V V2.2 specification.

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.

 

 

 

 

 

 

 

 

 

 

 

Mushkin Enhanced Joule 1000W
Temperature & Fan Speeds @ 110/230Vac
DC Loading(W)
Temp In (°C)
Temp Out (°C)
Δ Temp (°C)
Fan Speed (RPM)
0
N/A
N/A
N/A
1373/1368
193/192
24.3/24.8
27.7/27.4
3.4/2.6
1398/1399
482/482
24.2/22.9
31.1/32.4
6.9/9.5
1443/1432
957/956
24.3/23.2
35.3/35.3
11.0/12.1
2664/2655

 

The fan curve for the Mushkin Enhanced Joule 1000W power supply included in the user manual shows fan speeds of 969, 1023, 1673 and 2347 rpm for 0, 20, 50 and 100% load. The measured values are approximately 30% higher than indicated but the power supply did remain cool throughout testing no doubt due to the elevated fan speeds in combination with high efficiency. The fan noise won't be a problem for most people at 1400 rpm, but it grew noticeably louder at full load with fan speeds approaching 2700 rpm. High fan noise at a loading of nearly 1000W is to be expected, but it's no louder than a lot of other power supplies in this class and an inevitable consequence of cooling a 1kW power supply.

 

 

For those that like to light up their PC enclosure, the Mushkin Enhanced Joule 1000W power supply comes with a choice of colored fan lighting courtesy of a miniature slide switch mounted on the rear of the power supply enclosure. These photographs were taken in what was almost total darkness, so don't expect the effect to be quite as striking. The good news, if you're anything like me, is that the slide switch offers two positions that switches the lighting off.

Conclusion:

Price Per the Watt:

Power Supply Mushkin Enhanced Joule 1000W at $229.99 = $0.23/Watt (05-2010)

The Mushkin Enhanced Joule 1000W is a great looking power supply (in my opinion), with a couple of features that may appeal to some enthusiasts. These are the option to run the power supply in multi or single 12V rail configuration and that the color of the fan lighting are both selectable via rear mounted miniature slide switches. The option to switch the fan lighting off altogether is there if, like me, you aren't a fan of case lighting.

The Mushkin Enhanced Joule 1000W power supply performed very well and produced a set of results that compare well against other power supplies in its class. The DC voltage load regulation is excellent and when combined with good AC noise/ripple levels means stable, good quality DC rails. The power supply carries no 80 Plus, SLI or Crossfire certification, but that isn't necessarily a bad thing. For one reason or another, Mushkin Enhanced have chosen not to submit the power supply, but it doesn't mean the power supply isn't efficient or capable of reliably powering dual graphic card configurations. The Mushkin Enhanced Joule 1000W would be a great choice for any powerful high-end PC running graphics cards in SLI or Crossfire.

Power supply technology is constantly evolving and I don't think it's too much to expect the current crop of high-end power supplies to maintain 80% efficiency across the board. The Mushkin Enhanced Joule 1000W produced satisfactory results until fully loaded, at which point, the efficiency dipped to 77%. It's not really a problem and in no way affects the ability to reliably power a PC, but it does mean a few extra dollars on the electricity bill at the end of the year. What about noise? If you are thinking of running this power supply at or near full load, which is highly unlikely for full-time use, the fan noise will be a problem, so keep that in mind.

The Mushkin Enhanced Joule 1000W is a great performer and is certainly worthy of your consideration if you require 1000W of reliable, clean and stable power.

 

Pros:

 

Cons: