In this review we had a look at two PSUs from the Whisper M series. Whisper M is BitFenix’s second attempt to market a competitive PSU series. Their first attempt was with the Fury, a PSU series that heavily relied on its aesthetic design but did not really stand out of the crowd at the time. BitFenix capitalized on the experience they gained from this endeavor and took a different approach with the new Whisper M series, balancing the unit between aesthetics, performance, quality and cost.

The thermal control of the Whisper M units is simplistic, and therefore the acoustics strongly depend on the internal temperature of the case. This may be a good or bad thing, depending on how well-cooled the system is. It is possible that good builds may allow the Whisper M to stay completely quiet until even if it is heavily loaded, whereas restrictive setups could force it to spin up its fan even while the system is idling. One thing is for certain - the power rating has very little to do with the acoustics performance here given how close both units perform audibly. It would actually be harmful to purchase a significantly oversized model hoping to get lower noise levels, as the electrical performance within the load range of the system would decline.

Perhaps the most impressive feature of the Whisper M series is their power quality. Both units had a voltage regulation of just 1% on every one of their lines and the ripple was minimal even when the PSUs were heavily loaded. The OEM, Channel Well Technology, played no small part. After all, no matter how much BitFenix might have tweaked it, the original platform is a CWT design. This platform is specifically designed for modular PSU designs, as the PCB that holds the modular connectors is soldered directly onto the main PCB, virtually eradicating the need of cables that can adversely affect both the efficiency and the power quality of the PSU. The overall design is very clean and the assembly is exceptional, with no manufacturing flaws to the found, and the suppliers of the components are all highly reputable. The use of top quality components also allows the Whisper M units to maintain their excellent performance under high ambient temperatures. It is no coincidence that BitFenix covers these units with a seven-year warranty.

The cherry on top here is the retail pricing. According to BitFenix’s announced MSRP, the Whisper M PSUs are very competitively priced. Less than $70 can get you a fully modular PSU, with great overall performance and backed up by a seven-year warranty, with enough power for a modern single-GPU gaming PC. The company certainly used every bit of experience they gained since their first attempt and managed to bring a truly competitive series into a highly saturated market. The only issue with the Whisper M series is their current availability; it is very difficult to find a shop that has any model of the series in stock and, when they do bring stock in, the units are usually gone in a matter of hours. Hopefully BitFenix will resolve this issue soon and we are going to see a healthy inventory available, at least on the major retailers/e-tailers.

Hot Box Test Results


View All Comments

  • Chaitanya - Wednesday, February 15, 2017 - link

    Those cables certainly look nice, especially the 24pin cable. Reply
  • HomeworldFound - Wednesday, February 15, 2017 - link

    The 24pin cable looks pretty good. The 24pin ATX cable has really gotten annoying for me. Is there no way to further innovate in that area? Reply
  • The_Assimilator - Thursday, February 16, 2017 - link

    Barring another revision of the ATX spec, the best we can hope for is right-angled 24-pin connectors on motherboards a la EVGA. Reply
  • DanNeely - Thursday, February 16, 2017 - link

    As stagnant as the desktop's become about the best we could hope for is to declare about 1/3rd to 1/2 of the pins in the big connector optional (-12v, most of the 3.3/5v, and a few of the corresponding grounds) and have a big sparsely wired connector.

    I'm not sure a right angle 24pin socket is actually a good idea in general. Cable routing is far worse with it in a compact case without wiring space behind the mobo. Even if you have wiring space behind the mobo, it's still a much more cramped space to be trying to make the tight bend you need to get it into position. It also makes having a cable hole mis-aligned with where the mobo connector is a lot more problematic; with a vertical socket you can just feed an extra few inches up to shift to the side, horizontally not so much. Lastly I'd be a bit leary about it just in terms of general strain relief. The great big fat cable can pull on the socket really hard if it's alignment is off and a tall cable loop coming up gives a lot more potential slack to dissipate the force than a tight 180* turn coming through the cable hole.
  • BrokenCrayons - Wednesday, February 15, 2017 - link

    It's easy to overlook a typo on the box to pick up a very reasonably priced PSU with high efficiency and good test results. The absurdly long warranty is a bonus. I think we've got a winner here. Reply
  • jardows2 - Thursday, February 16, 2017 - link

    Maybe it's intentional, and should be read as Perf-Romance - as in you'll fall in love with the "perf" of this product! Reply
  • fire400 - Sunday, February 19, 2017 - link

    lol.. great marketing strategy Reply
  • Drumsticks - Wednesday, February 15, 2017 - link

    How does this compare to the RM550x, which made it onto your best of list last year?

    It looks like a pretty good unit, though, and for a little bit less than the 550x. Hopefully we can see more stock like you said. I can't find it in the US at all.
  • fanofanand - Wednesday, February 15, 2017 - link

    These PSU reviews might not gather as many comments or as much appreciation, but the next time someone is putting together a new build they will appreciate the time and effort spent. BitFenix has been doing some really great things lately and it looks like this PSU will continue that trend. Nice job with this review. Reply
  • wolfemane - Wednesday, February 15, 2017 - link

    I really wish this review had come out just a few days earlier. Wound up getting a RM550x for a bit more. BUMMER! Reply

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