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Hiper HPU-5K880 and HPU-5B680 Type R Mk II PSU's E-mail
Reviews - Featured Reviews: Power
Written by Olin Coles   
Wednesday, 16 January 2008
Table of Contents: Page Index
Hiper HPU-5K880 and HPU-5B680 Type R Mk II PSU's
Features and Specifications
Type R Mk-II HPU-5B680 Exterior
Type R Mk-II HPU-5K880 Exterior
Type R Mk-II Cables and Wiring
Testing Voltage Ripple and Regulation
HPU-5B680 Test Results
HPU-5K880 Test Results
Final Thoughts and Conclusion

Hiper HPU-5B680 Test Results

In the test results below, it might be necessary to explain what you are viewing. In each image the AC power ripple is represented by the yellow trace line making up the waveform. While every personal computer power supply unit available to the retail market has some degree of measurable AC power ripple, it is most important that measurable AC ripple is very minor and does not create a large peak to peak voltage (Vpp) distortion. Stable, well-regulated power is critical to system stability and hardware longevity.

AC Ripple Waveform at Light Idle Load


The waveform image above shows the AC power ripple under light idle load, which is measured inside of a 1ms recording frame. Waveform data recorded during the light idle load measurement is represented in the chart below:

AC Ripple Waveform Data at Light Idle Load


The waveform data above describes the actual measurements at light idle load. The maximum AC RMS ripple was 24.5 mV under light idle load. Note that this result is slightly less favorable than the average readings we have collected under light idle load.

Here are the average AC RMS ripple measurements under light idle load for power supplies we have recently tested:

AC Power Ripple at Idle Load

The waveform image below shows the AC power ripple under heavy load. The maximum AC RMS ripple was 32.16 mV under heavy load. Note that these results fall within the average of test results we have collected under heavy load.

AC Ripple Waveform at Heavy Load


Under heavy load, the Hiper HPU-5B680 680W Power Supply Unit measured an average AC RMS ripple just slightly higher than the ripple at light idle load, which measures slightly better than the average results we have recorded. The waveform data recorded during the heavy load measurement is represented in the chart below:

AC Ripple Waveform Data at Heavy Load


Because the Hiper HPU-5B680 680W Type R Mk-II PSU offered less than average results in the idle readings, I didn't really expect them to get much better; but depite the increase is RMS ripple this PSU recoorded better results into the heavy load tests. Here are the average AC RMS ripple measurements under heavy load for other power supplies we have recently tested:

AC Power Ripple at Heavy Load

The power dropped down to no less than 11.94 V, which means that even under heavy load there is no chance that system stability will be affected. Under light idle load conditions the DC regulation averaged 0.25 Vpp, and only slightly increased under heavy load to a measured 0.31 Vpp; both power regulation results are well above average. The DC regulation data recorded at light and heavy load is displayed in the chart below:

DC Voltage Regulation Waveform Data at Light Idle and Heavy Load

HPU-5B680_Idle_DC_Data.png HPU-5B680_Load_DC_Data.png

At a glance, the Hiper HPU-5B680 offered near-average AC ripple fluctuation with very little deviation in DC peak-to-peak voltage regulation. These idle readings were taken with a 31% load of 207W and the stress readings were taken with a 46% load of 315W on the 680W rated power supply output.

Many of the power supplies we test here at Benchmark Reviews have DC voltage regulation measuring above the 12V baseline more often than below. For obvious reasons, the diversion from the 12V baseline with increased voltage is more preferred than below it since dropping too far under 12V will cause a system to power off or recycle. Plainly put, no power supply is ever perfectly centered at 12V DC; instead they most often maintain a DC mean voltage higher than they are regulated at.



# Voltage Monitoring via SoftwareRobertC 2010-05-18 22:26
Great work adding the electrical measurements to your PS reviews. I am curious about your opinions on and experiences with software power monitoring tools that are installed and run on a PC. Intel has in its Desktop Utilities tool a Hardware Monitor section which among other things, displays voltage readings of the +12, +5, and +3.3 DC rails, as well as the MCH and Processor voltages (labeled Vcc.) The seemingly real time digital display has a resolution of three decimal places (1/1000 volt.) Alarms can be set to warn of over or under voltage situations. In general, how do these programs work and how accurate can they be? Are any of them worthy of an enthusiasts attention? Thank you.
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# RE: Voltage Monitoring via SoftwareOlin Coles 2010-05-19 06:45
While the accuracty may not be to electrical engineer level, I would contend that some form of monitoring is better than none at all. So long as the software doesn't cause any problems, I'd say it's worth installing.
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