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[nextpage title=”Introduction”]

Two years ago, we reviewed the Huntkey Jumper 550, which exceeded our expectations. Now it is time to review the Jumper 600B, which comes with the 80 Plus Bronze certification. (Hence the letter “B” after the product wattage; it is important to understand that the 500 W and 550 W models from this family have the standard 80 Plus certification.) Let’s see how the Jumper 600B fared on our tests.

Huntkey Jumper 600BFigure 1: Huntkey Jumper 600B power supply

Huntkey Jumper 600BFigure 2: Huntkey Jumper 600B power supply

The Huntkey Jumper 600B is 6.3” (160 mm) deep, using a 140 mm sleeve bearing fan on its bottom (Yate Loon D14SH-12).

Different from the 550 W model, the 600B version doesn’t have a modular cabling system. All cables are protected with nylon sleeves, but the sleeves don’t come from inside the unit. This power supply comes with the following cables:

  • Main motherboard cable with a 20/24-pin connector, 17.7” (45 cm) long
  • One cable with two ATX12V connectors that together form an EPS12V connector, 17.7” (45 cm) long
  • Two cables, each with one six/eight-pin connector and one six-pin connector for video cards, 17.7” (45 cm) to the first connector, 5.9” (15 cm) between connectors
  • Two cables, each with three SATA power connectors, 17.7” (45 cm) to the first connector, 5.9” (15 cm) between connectors
  • One cable with four standard peripheral power connectors, 17.7” (45 cm) to the first connector, 5.9” (15 cm) between connectors
  • One cable with three standard peripheral power connectors and one floppy disk drive power connector, 17.7” (45 cm) to the first connector, 5.9” (15 cm) between connectors

All wires are 18 AWG, which is the minimum recommended gauge, except for the wires on the main motherboard cable, which are thicker (16 AWG).

The cable configuration is excellent for a 600 W power supply, allowing you to install two high-end video cards without the need of adapters. On the other hand, some users may find the cables too short.

Huntkey Jumper 600BFigure 3: Cables

Let’s now take an in-depth look inside this power supply.

[nextpage title=”A Look Inside the Huntkey Jumper 600B”]

We decided to disassemble this power supply to see what it looks like inside, how it is designed, and what components are used. Please read our “Anatomy of Switching Power Supplies” tutorial to understand how a power supply works and to compare this power supply to others.

On this page we will have an overall look, and then in the following pages we will discuss in detail the quality and ratings of the components used.

Huntkey Jumper 600BFigure 4: Top view

Huntkey Jumper 600BFigure 5: Front quarter view

Huntkey Jumper 600BFigure 6: Rear quarter view

Huntkey Jumper 600BFigure 7: The printed circuit board

[nextpage title=”Transient Filtering Stage “]

As we have mentioned in other articles and reviews, the first place we look when opening a power supply for a hint about its quality, is its filtering stage. The recommended components for this stage are two ferrite coils, two ceramic capacitors (Y capacitors, usually blue), one metalized polyester capacitor (X capacitor), and one MOV (Metal-Oxide Varistor). Very low-end power supplies use fewer components, usually removing the MOV and the first coil.

In the transient filtering stage, this power supply has four Y capacitors and one X capacitor more than the minimum required; however, it doesn’t come with an MOV, which is responsible for removing spikes coming from the power grid.

Huntkey Jumper 600BFigure 8: Transient filtering stage (part 1)

Huntkey Jumper 600BFigure 9: Transient filtering stage (part 2)

On the next page, we will have a more detailed discussion about the components used in the Huntkey Jumper 600B.

[nextpage title=”Primary Analysis”]

On this page, we will take an in-depth look at the primary stage of the Huntkey Jumper 600B. For a better understanding, please read our “Anatomy of Switching Power Supplies” tutorial.     

This power supply uses two T10KB80 rectifying bridges connected in parallel, attached to an individual heatsink. Unfortunately, we couldn’t find the datasheet for these components, but it is clear that each bridge supports up to 10 A. So in theory, you would be able to pull up to 2,300 W from a 115 V power grid. Assuming 80% efficiency, the bridges would allow this unit to deliver up to 1,840 W without burning themselves out. Of course, we are only talking about these particular components. The real limit will depend on all the components combined in this power supply.

Huntkey Jumper 600BFigure 10: Rectifying bridges

The act
ive PFC circuit uses two STW26NM60N MOSFETs, each one supporting up to 20 A at 25° C or 12.6 A at 100° C in continuous mode (note the difference temperature makes), or 80 A at 25° C in pulse mode. These transistors present a 165 mΩ resistance when turned on, a characteristic called RDS(on). The lower the number the better, meaning that the transistor will waste less power, and the power supply will have a higher efficiency.

Huntkey Jumper 600BFigure 11: The active PFC diode and the active PFC transistors

The output of the active PFC circuit is filtered by one 470 µF x 450 V Japanese electrolytic capacitor from Chemi-Con, labeled at 85° C.

In the switching section, two STW28NM50N MOSFETs are employed using the traditional two-transistor forward configuration. Each transistor supports up to 21 A at 25° C or 13 A at 100° C in continuous mode, or up to 84 A at 25° C in pulse mode, with an RDS(on) of 158 mΩ.

Huntkey Jumper 600BFigure 12: Switching transistors

The primary is managed by a CM6802 active PFC/PWM combo controller.

Huntkey Jumper 600BFigure 13: Active PFC/PWM combo controller

Let’s now take a look at the secondary of this power supply.

[nextpage title=”Secondary Analysis”]

The Huntkey Jumper 600B uses a regular design in its secondary, with Schottky rectifiers.

The maximum theoretical current each line can deliver is given by the formula I / (1 – D) where D is the duty cycle used and I is the maximum current supported by the rectifying diode. As an exercise, we can assume a duty cycle of 30 percent.

The +12 V output uses two M6060P Schottky rectifiers, each one supporting up to 60 A (30 A per internal diode at 95° C with a 0.64 V maximum voltage drop). This gives us a maximum theoretical current of 86 A or 1,029 W for the +12 V output.

The +5 V output uses two STPS30L45CT Schottky rectifiers, each one supporting up to 30 A (15 A per internal diode at 110° C with a 0.74 V maximum voltage drop). This gives us a maximum theoretical current of 43 A or 214 W for the +5 V output.

The +3.3 V output uses another two STPS30L45CT Schottky rectifiers, giving us a maximum theoretical current of 43 A or 141 W for the +3.3 V output.

Huntkey Jumper 600BFigure 14: The +12 V rectifiers, the +5 V rectifiers, the +3.3 V rectifiers, and the +5VSB rectifier

This power supply uses a WT751002 monitoring integrated circuit, which supports only over voltage (OVP) and under voltage (UVP) protections. However, there are one LM393 and two LM339 voltage comparators to expand the functionalities of the WT751002 integrated circuit and create the over current protection.

Huntkey Jumper 600BFigure 15: Monitoring circuit

The electrolytic capacitors that filter the outputs are from Fcon and labeled at 105° C, as usual.

[nextpage title=”Power Distribution”]

In Figure 16, you can see the power supply label containing all the power specs.

Huntkey Jumper 600BFigure 16: Power supply label

According to the label, this unit has four +12 V rails. We clearly saw four “shunts” (current sensors), and the monitoring circuit seems to have the over current protection. Click here to understand more about this subject.

Huntkey Jumper 600BFigure 17: Shunts

The +12 V rails are distributed as follows:

  • +12V1 (solid yellow wires): Main motherboard, the SATA, and the peripheral power connectors
  • +12V2 (yellow/black wires): The ATX12V/EPS12V connector
  • +12V3 (yellow/green wires): One of the video card power cables
  • +12V4 (yellow/green wires): The other video card power cable

On the sample we received, the +12V4 rail was using yellow/green wires instead of yellow/blue wires as advertised on the power supply label.

How much power can this unit really deliver? Let’s find out.

[nextpage title=”Load Tests”]

We conducted several tests with this power supply, as described in the article, “Hardware Secrets Power Supply Test Methodology.”      

First, we tested this power supply with five different load patterns, trying to pull around 20%, 40%, 60%, 80%, and 100% of its labeled maximum capacity (actual percentage used listed under “% Max Load”), watching the behavior of the reviewed unit under each load. In the table below, we list the load patterns we used and the results for each load.

If you add all the powers listed for each test, you may find a different value than what is posted under “Total” below. Since each output can have a slight variation (e.g., the +5 V output working at +5.10 V), the actual total amount of power being delivered is slightly different than the calculated value. In the “Total” row, we are using the real amount of power being delivered, as measured by our load tester.

The +12VA and +12VB inputs listed below are the two +12 V independent inputs from our load tester. During this test, the +12VA input was connected to the power supply +12V1 and +12V3 rails, while the +12VB input was connected to the power supply +12V2 rail.

Input Test 1 Test 2 Test 3 Test 4 Test 5
+12VA 4 A (48 W) 9 A (108 W) 13 A (156 W) 17.5 A (210 W) 21.5 A (258 W)
+12VB 4 A (48 W) 9 A (108 W) 13 A (156 W) 17.5 A (210 W) 21 A (252 W)
+5 V 1 A (5 W) 2 A (10 W) 4 A (20 W) 6 A (30 W) 8 A (40 W)
+3.3 V 1 A (3.3 W) 2 A (6.6 W) 4 A (13.2 W) 6 A (19.8 W) 8 A (26.4 W)
+5VSB 1 A (5 W) 1 A (5 W) 1.5 A (7.5 W) 2 A (10 W) 3 A (15 W)
-12 V 0.5 A (6 W) 0.5 A (6 W) 0.5 A (6 W) 0.5 A (6 W) 0.5 A (6 W)
Total 116.4 W 242.0 W 361.0 W 487.8 W 598.8 W
% Max Load 19.4% 40.3% 60.2% 81.3% 99.8%
Room Temp. 45.2° C 44.6° C 45.0° C 46.6° C 49.8° C
PSU Temp. 48.8° C 48.4° C 48.4° C 48.8° C 50.8° C
Voltage Regulation Pass Pass Pass Pass Pass
Ripple and Noise Pass Pass Pass Pass Pass
AC Power 138.1 W 278.5 W 419.4 W 577.7 W 727.0 W
Efficiency 84.3% 86.9% 86.1% 84.4% 82.4%
AC Voltage 119.0 V 117.2 V 116.5 V 114.7 V 113.1 V
Power Factor 0.970 0.984 0.992 0.992 0.995
Final Result Pass Pass Pass Pass Pass

The Huntkey Jumper 600B achieved impressive results on our tests.

Efficiency was between 82.4% and 86.9% during our tests. If you follow our reviews, you know that even though the 80 Plus Bronze certification promises minimum efficiency of 82% at full load, several power supplies aren’t able to achieve that under real-world situations.

Voltages were closer to their nominal values (3% regulation) during all tests. The ATX12V specification states that positive voltages must be within 5% of their nominal values, and negative voltages must be within 10% of their nominal values.

Let’s discuss the ripple and noise levels on the next page.

[nextpage title=”Ripple and Noise Tests “]

Voltages at the power supply outputs must be as “clean” as possible, with no noise or oscillation (also known as “ripple”). The maximum ripple and noise levels allowed are 120 mV for +12 V and -12 V outputs, and 50 mV for +5 V, +3.3 V and +5VSB outputs. All values are peak-to-peak figures. We consider a power supply as being top-notch if it can produce half or less of the maximum allowed ripple and noise levels.

The Huntkey Jumper 600B provided extremely low ripple and noise levels for the +5 V and +3.3 V outputs, but with a level above what we would like to see at +12 V, but still below the maximum allowed.

Input Test 1 Test 2 Test 3 Test 4 Test 5
+12VA 35.0 mV 46.2 mV 58.8 mV 70.2 mV 88.8 mV
+12VB 27.6 mV 36.2 mV 47.8 mV 57.6 mV 73.4 mV
+5 V 7.2 mV 8.6 mV 9.6 mV 9.2 mV 12.0 mV
+3.3 V 10.0 mV 9.6 mV 10.6 mV 10.6 mV 14.8 mV
+5VSB 7.4 mV 6.6 mV 9.0 mV 10.2 mV 12.4 mV
-12 V 26.4 mV 29.6 mV 35.0 mV 40.8 mV 45.6 mV

Below you can see the waveforms of the outputs during test five.

Huntkey Jumper 600BFigure 18: +12VA input from load tester during test five at 598.8 W (88.8 mV)

Huntkey Jumper 600BFigure 19: +12VB input from load tester during test five at 598.8 W (73.4 mV)

Huntkey Jumper 600BFigure 20: +5V rail during test five at 598.8 W (12 mV)

Huntkey Jumper 600BFigure 21: +3.3 V rail during test five at 598.8 W (14.8 mV)

Let’s see if we can pull more than 600 W from this unit.

[nextpage title=”Overload Tests”]

Below you can see the maximum we could pull from this power supply. The objective of this test is to see if the power supply has its protection circuits working properly. This unit passed this test, as we couldn’t pull more than shown in the table below because the power supply would shut down, showing that its protections are present and working fine. During this extreme configuration, voltages were still within three percent of their nominal values and noise and ripple levels at +5 V and +3.3 V outputs were still extremely low, but at +12 V they were above 100 mV.

Input Overload Test
+12VA 28 A (336 W)
+12VB 28 A (336 W)
+5 V 12 A (60 W)
+3.3 V 12 A (39.6 W)
+5VSB 3 A (15 W)
-12 V 0.5 A (6 W)
Total 790.4 W
% Max Load 131.7%
Room Temp. 43.8° C
PSU Temp. 48.8° C
AC Power 1,018 W
Efficiency 77.6%
AC Voltage 109.7 V
Power Factor 0.998

[nextpage title=”Main Specifications”]

The main specifications for the Huntkey Jumper 600B power supply include:

  • Standards: NA
  • Nominal labeled power: 600 W
  • Measured maximum power: 790.4 W at 43.8° C
  • Labeled efficiency: 80 Plus Bronze certification
  • Measured efficiency: Between 82.4% and 86.9%, at 115 V (nominal, see complete results for actual voltage)
  • Active PFC: Yes
  • Modular Cabling System: No
  • Motherboard Power Connectors: One 20/24-pin connector and two ATX12V connectors that together form an EPS12V connector
  • Video Card Power Connectors: Two six-pin and two six/eight-pin connectors on two cables
  • SATA Power Connectors: Si
    x on two cables
  • Peripheral Power Connectors: Seven on two cables
  • Floppy Disk Drive Power Connectors: One
  • Protections (as listed by the manufacturer): Over voltage (OVP), under voltage (UVP), over current (OCP), over power (OPP), and short-circuit (SCP) protections
  • Are the above protections really available? Yes
  • Warranty: Three years
  • More Information: https://www.huntkeydiy.com
  • MSRP in the U.S.: NA

[nextpage title=”Conclusions”]

The Huntkey Jumper 600B proved to be a very good mainstream power supply, with an outstanding voltage regulation (three percent regulation during all tests), high efficiency up to 87%, and extremely low noise and ripple levels at +3.3 V and +5 V outputs. At +12 V, however, noise and ripple were higher than we’d like to see to consider a power supply “flawless,” but still below the maximum allowed. Also, the lowest efficiency we saw was 82.4%, and several power supplies with the 80 Plus Bronze certification we reviewed can’t provide 82% efficiency at full load under real-world scenarios, so this is another positive point for the Jumper 600B. The cable configuration is excellent for a mainstream 600 W unit, coming with four video card power connectors, a feature not usually seen on 600 W units. On the other hand, some users may find the cables too short.