There are numerous companies out in the market that manufacure PSU’s. However, PSU’s with the same watt output do not perform similarly, as the build quality, the materials used and mainly the efficiency determine the performance of a PSU. Today we are testing the Huntkey X7 900, a 900W PSU with a 80Plus Silver efficency.
Huntkey was founded in 1992, and their headquarters are located in China. They mainly specialise in power supply units, PC chassis, power adapters and more.
Let’s take a quick look at Huntkey X7 900 specifications and features, taken directly from Huntkey’s website:
- Cable management design
- Complies with Intel ATX12V V2.3 & EPS12V V2.92
- Certified by 80 PLUS® Silver
- Active PFC (PF>0.99)
- Extreme silence with intelligent-thermal fan control technology
- Supports SLI & Crossfire Multi-GPU VGA cards
- Supports Intel & AMD Dual Core CPUs and Multi Core CPUs
- Supports PCs, IPCs, work stations and servers
- Strict voltage regulation (±3%) provides stable voltage for system
- The standby mode consumes less than 1W when +5VSB is less than 0.1A.
- Five +12V rails provide superior system performance
- Advanced phase-shifting control full-bridge brings high reliability & efficiency
- Multiple protection functions: OCP, OVP, UVP, OPP, SCP
- 100% Burn-In test & Hi-Pot test
- MTBF: 100KHrs
The Huntkey X7 900 comes in a big elegant retail box, with a big X7 logo at the front and back side. The colour combination used is mainly with dark colours.
With the removal of the outer wrapping, there is a luxurious case with a flip top opening in which we find the package contents.
All contents are nicely packed inside the box and are well separated, as the cables have their own space on the top of the box. At the box’s inner part of the cover, there is a detailed report of the PSU’s features with colourful icons, as well as a stamp that informs us that the PSU comes with a 2-year warranty. Generally we can say that the packaging is neat and elegant.
The Huntkey X7 900 comes with a basic set of hard wired cables and connectors, which seems a little light for a 900W PSU. Of course all the cables are covered with black plastic mesh sleeving which is something we could expect from a PSU of this price range.
Cable length is long enough for installing the PSU at the top or the bottom of the PC chassis. The cable set includes two 6/8 PIN PCIe, two 6 PIN PCIe, one 4/8 PIN ATX/EPS CPU, two SATA and one HDD modular cable. As you can see from the pictures, all the cables are modularized, except for the 24PIN ATX12V connector. That means that you will not have the cable chaos inside your PC case, as you will only use the cables you really need.
Inside the package you will find also two handbooks, one with PSU tips and one user’s manual.
A Closer Look – The PSU
The Huntkey X7 900 has a solid build quality with a neat silver-black finish.
The honey comb grill on the back allows air to be exhausted out of the power supply with minimal restriction and turbulence. Unfortunatelly, there is no power on-off button, which surprised us.
At the right side of the PSU we find a label stating DC outut and rated power.
As stated before, the PSU is modular. As you can see, the cable categories are well organised without confusing the user. Each cable type has its own sticker and connector colour.
The 140mm diameter 2-ball bearing cooling fan is located on the top of the PSU and blows cooling air in and out at the back.
It is made from Yate Loon Electronics and the model is the D14BH-12 (L-S04) which runs at 2800 rpm, has a good airflow of 140CFM while producing 48Db of noise.
A Closer Look – The PSU Interior
The inside part of the X7 is made with very high quality standards, carefully made soldering and neat mounting of large components.
In the primary heatsink we see a BDR from Shindengen, rated at 25A600V, which is produced in Japan with high-quality standards.
Here we just barely see a resonant inductor.
The capacitors used in a PSU play an important part in the PSU’s quality. Two Nippon Chemi-Con capacitors are used on the primary side, both are rated at 85c/450V. Voltage rating is very good and they can hold up efficiently under full load.
Huntkey has chosen to use high-quality electrolytic capacitors made in Japan with a low equivalent resistance and operating temperature to 105 degrees Celsius.
A Closer Look – The PSU Interior, Continued
Here is a picture showing the layout and components inside the Huntkey X7 900 power supply. The overall layout, build quality and component selection appears to be very good as we have come to expect from a PSU of this category.
The circuit board has a modern two-sided design to optimize the layout of the circuit.
From the above picture we can take an idea of the PFC coil used.
At the above picture we can see the second phase capacitors that the PSU utilizes.
The HK900-11PEPGP is a proof that this PCB is an official Huntkey product.
The circuit board has a modern two-sided design to optimize the layout of the circuit. All soldering has been done with high-quality standards.
Test Setup and Procedures
The machine’s specs on which we tested the psu are:
Processor: Intel Core i7 920
Motherboard: Asus P6X85D
RAM: 6 GB Mushkin 6-7-6-18
VGA: 2 x Gigabyte GTX480 1536MB
HDD: Velocity Raptor 150GB
PSU: Huntkey X7 900W
Case: Thermaltake Armor VA8003BWS
Operating System: Windows 7 64-bit
The tests that we ran included:
- Idle Voltages (Rails)
- Load Voltages (Rails)
- Power Consumption
- Noise Levels
- Efficiency Test
At both idle and load system states, the PSU’s voltages at its rails proved to be very stable for the whole duration of the test.
The PSU was tested with our power-hungry dual GTX480’s. The power consumption varied between logical levels and there was no problem with continuous power supply.
The noise levels were nothing particular and are considered normal for this PSU category.
At the above diagram we can take an idea of how efficiently the X7 transfers the power from the wall outlet to our system. It seems like the 80Plus Silver certification make this PSU to achieve a high level of efficiency in 230, 120 and 90VAC line inputs.
If you are in the market for a powerful, quiet power supply for your high-end system that produces a near-1000W punch, then the Huntkey X7 900 will be a great choice. The PSU was efficient, as it is 80Plus Silver certified and the voltages remained stable at both system load and idle states, while being quiet without annoying the user.
The modular cabling system is done extremely well and is very organized, so the user can avoid the cable chaos inside the case. The build quality of the PSU is solid, while the gun metal casing with fan grill gives an awesome look. You will be able to power almost everything, taking the specs of the X7 into consideration. Even for Quad-SLI systems, there will not be a problem.
During our tests, it managed to sufficiently power our 2 power hungry GTX480 at full load without problems. Across Europe, the X7’s price is approximately 200 euros. For the casual user this may be a high amount to spend, but it is considered logical for getting a powerful and reliable PSU for high-end users.
(+) Solid performance
(+) Modular design
(+) Build quality
Thus, we give the Huntkey X7 900 our Performance Award, as it is a powerful and reliable PSU that will fully cover a system’s power needs.