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Mushkin Enhanced XP-650 Power Supply Review
Mushkin Enhanced XP-650 Power Supply Review - PCSTATS
Abstract: The XP-650 power supply has a peak power rating of 650W, adheres to the ATX 2.0 standard and is multi-videocard ready.
 80% Rating:   
Filed under: Power Supply Published:  Author: 
External Mfg. Website: Mushkin Jun 05 2006   Max Page  
Home > Reviews > Power Supply > Mushkin Enhanced XP-650

Testing Mushkin's First Power Supply

The price of energy is increasing world wide, and any reduction in the amount of power a computer draws is welcome in our books. Power supplies which employ power factor correction (PFC, or A-PFC) help ensure efficient conversion of AC to DC, and reduce the amount of energy wasted as heat. The following power tests were all conducted with an Extech Model 380803 Power Analyzer located between the mains 120AC supply and the power supply. Power jitter is measured with a Mastech MS8230B Multimeter at the device power connectors .

Here is a picture of the test set up for the Mushkin Enhanced XP-650 650W power supply.

Power Jitter Observations - Motherboard

Voltage jitter is read by accessing the power options displayed in the motherboard BIOS, with the system obviously in an unloaded state. *All voltages were read from the BIOS of an ECS RS480-M motherboard.

Listed Voltages Lower Voltage Upper Voltage Jitter
+3.3V 3.27V 3.35V 0.08V
+5.0V 4.97V 4.99V 0.02V
+12V 11.7V 11.8V 0.01V
-12V -11.99V -12.00V 0.01V
-5.0V -4.99V -4.99V 0.00V
+5.0Vsb 5.0V 5.0V 0.00V

The 12V rail readings in the BIOS are a bit on the low side, it's nothing out of the ordinary however a bit lower than we expected. Luckily there are internal pots to adjust the voltages, too bad you'll have to void your warranty to do so.

Power Jitter Observations - Multi-meter

Voltage jitter was read by a Mastech MS8230B Multimeter with the system in an unloaded state. During testing the power supply is was still connected to a full computer and voltage values.

Listed Voltages Lower Voltage Upper Voltage Jitter
+3.3V 3.33V 3.4V 0.07V
+5.0V 5.0V 5.0V 0.00V
+12V 11.9V 12.0V 0.01V

It's interesting to see here that the digital multimeter is reporting much better values. The 12V rail is hovering at around 12V which is great to see. Next, load tests with the Seasonic PSU tester and then our final conclusions on this unit.

Seasonic Load Tests Source: Seasonic

When looking at the Seasonic Power Supply test results we see two values, wattage and volt-amps. Since it might not be clear what they measure, here's a brief overview.

The volt-amp (VA) value is how much real power is being consumed by the power supply being tested to provide the wattage (W) value. The higher the VA value is, the more electricity is being used by the power supply. Because no electrical device is 100% efficient, there will always be some loss when converting AC to DC. The closer the volt-amps and wattage figures are to each other, the more efficient a power supply is. This is called the Power Factor: wattage / volt-amps = PF.

Since we're testing with a 120W dummy load, the load on the power supply (wattage) should be as close to this figure as possible. Anything above this load in apparent power describes the overhead and wasted energy (given off as heat) for the particular power supply being tested. For the unloaded tests, the wattage and volt-amp figures should be as close as possible to one another. The lower the figures are, the less power is being wasted.

Measurements were taken with the Extech 380803 Power Analyzer.

Seasonic Power Load Tests

Power Supply Wattage Test Type Loaded Unloaded
Seasonic SuperTornado 400 W
Active Power 177 W 6 W
Apparent Power 182 VA 7 VA
Vantec iON2 350 W Active Power 192 W 10 W
Apparent Power 277 VA 21 VA
Antec TruePower 330 330 W Active Power 195 W 22 W
Apparent Power 289 VA 38 VA
Ultra X-Connect Green UV 500W 500 W Active Power 193W 22 W
Apparent Power 307 VA 40 VA
AOpen Silent Power AO400-12AHN 400 W Active Power 179W 9 W
Apparent Power 275 VA 18 VA
Seasonic S12-430 430 W
Active Power 179W 6W
Apparent Power 180VA 9VA
PC Power and Cooling Turbo-Cool 510 Express/SLI

510 W

Active Power

200 W

29 W
Apparent Power 202 VA 32 VA
HEC Ace Power 580UB

580 W

Active Power

183 W

12 W
Apparent Power 272 VA 26 VA
HEC Win 550UB 550 W Active Power 184W 10W
Apparent Power 263VA 22VA
Akasa PowerPlus AK-P550FF 550 W
Active Power 194W 38W
Apparent Power 197VA 40VA
AOpen Prima Power AO700-12ALN 700 W
Active Power 172W 3W
Apparent Power 181VA 9VA
PC Power & Cooling Turbo-Cool 1KW 1000 W
Active Power 205W 25W
Apparent Power 207VA 32VA
Seasonic S12 600 600 W
Active Power 164W 7W
Apparent Power 173VA 9VA
Mushkin Enhanced XP-650 650 W Active Power 192W 22W
Apparent Power 279VA 43VA

When it comes to power efficiency, the Mushkin Enhanced XP-650 sits in the middle of the pack. It's not the most efficient power supply we've tested but then again it's not the worst either. The applied load is 120W, so keep that in mind when looking at the above values and comparing against the other power supplies.

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Contents of Article: Mushkin Enhanced XP-650
 Pg 1.  Mushkin Enhanced XP-650 Power Supply Review
 Pg 2.  Appearence and Physical Specifications
 Pg 3.  Going Inside the Mushkin XP-650
 Pg 4.  — Testing Mushkin's First Power Supply
 Pg 5.  From Memory to Power Supplies

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