Epilogue
The be quiet! Power Zone 2 750W is a dead silent and highly efficient PSU, scoring Platinum in the Cybenetics ETA scheme. It is not the best performer in the 750W category, but it is ideal for users wanting a capable 750W unit that is as silent as a passively operating PSU. You will have to try a lot to force the fan in this PSU to spin at high RPMs, to become noticeable. Its transient response is pretty good, especially under ATX v3.1 transient loads, which are unrealistic, at least with the current generation GPUs. Efficiency is high overall, but I want to see over 70% with a 2% load. The APFC converter needs tuning for higher power factor readings, and the main reason that this unit lost several performance points is ripple at 12V under full load, which is not competitive.
The build quality and soldering quality are good, and I am fine with using Elite capacitors since this brand is among the best alternatives to the typical Japanese capacitor makers. Thanks to the new Cybenetics capacitor performance database, we have actual data on this hot subject and will no longer base our conclusions on rumors spread on the internet.
I will soon add more tests regarding the PSU’s protection features, and EMC pre-compliance testing is already the case for any newly reviewed PSU.
Before investing in a new power supply, read my Best ATX v3.x PSUs article to check all alternative PSU offerings. You help me a lot by using my affiliate links, which don’t increase the product’s price. I get a commission from Amazon every time you do it, which can make a difference for me, especially now that I am on my own, working exclusively for my media and not for someone else.
- Delivered full power at 46°C
- High build quality
- ATX v3.1 and PCIe CEM 5.1 compliant
- Efficient platform
- Silent operation
- Properly set 12V OCP
- Within 1% load regulation at 12V
- Good ripple suppression on the minor rails
- Good transient response on all rails
- Good transient response at 12V at high loads (ATX v3.1)
- Highly efficient 5VSB rail
- Low vampire power
- Alternative Low Power Mode (ALPM) compatible
- 12+4-pin PCIe connector (set at 600W)
- Quality (Rifle bearing) fan
- Adequate distance between the peripheral connectors
- Increased ripple at 12V at 100% load @ 45°C
- PF readings should be higher
- Relatively loose load regulation at 3.3V
- Highly set OPP and OCP triggering points on the minor rails
- Increased inrush currents
- No fan failure protection
Good day Aris,
Sorry to bother you, but I need some help choosing a PSU. After reviewing all the information on your website, I am still unsure which one to go for—the RM750x or the Power Zone 2 750W from Be Quiet!. My main concern is the PSU mounting in my PC case, which is side-mounted at the top corner. With the RM750x, the power cord connector placement means that if I face the fan inside the case, it could affect airflow. If I face the fan outside, the power cord would have to bend awkwardly.
On the other hand, the Power Zone 2 seems like it would fit better with the fan facing outside, avoiding the bent cable issue. Given these constraints, what would you suggest in this situation?
Thank you for your time and help.
The alternative could also be FSP Vita GM 750w but I am not sure which one would be better.
Aris Did all internal power supply components required for tearing down for a documentation or just some sample you did it for a tearing down, because some cybenetics doesn’t have internal info like a Bulk caps, MOSFET, IC, switcher, etc
If you ask whether all Cyben reports have part analysis, unfortunately, not for older samples. But for newer ones we try to have them on all.