Cooler Master Introduces MWE Bronze Power Supplies

Cooler Master decided to throw a budget PSU line into the market, addressing mainstream systems and users who don't want to invest much on their next PSU upgrade. The MWE line consists of five models with capacities ranging from 450W to 650W. None of them feature modular cables in order to restrict the production cost, but their platform utilizes DC-DC converters for the generation of the minor rails and Teapo capacitors, which are of good quality in general.

When it comes to filtering caps though, the name of the brand doesn't reveal much, because we have to know the exact model of the cap in order to have a clear view of its quality. There are Japanese caps, for example, with a low expected lifetime because they belong to budget lines that are inferior to Taiwanese caps that belong to high-end lines and thus have a longer lifetime. So don't get excited by phrases like "Japanese" or "Taiwanese caps" until you know the exact model number (and their quantity, of course). Usually companies don't share such information, so you need to read proper PSU reviews in order to find out all those important details (caps and fan model, platform design, build quality etc.)

The MWE units use Loop Bearing fans that seem to be inferior to the plain sleeve bearing ones that usually adorn PSUs in this price range. Moreover, CM backs up those units with a three-year warranty. The 80 PLUS Bronze certification is the lowest acceptable for today's standards; those units don't carry a Cybenetics rating, so we don't know much about their real-life performance and efficiency levels or their true output noise. Another interesting feature of the MWE PSUs is the compact footprint, which will allow for an easier installation and compensate, at least to some degree, for the lack of modular cables.

The max operating temperature for continuous full power deliver is at 40°C, an acceptable level given the budget prices of these units. The +12V rail cannot deliver full power alone in the three lower capacity models, while the MWE 600 and MWE 650 don't have this restriction. Usually PSUs with DC-DC converters for the minor rails don't have a problem delivering their full power at +12V, since this rail is the one feeding all the rest but 5VSB. Finally, we didn't expect two EPS connectors in any of those PSUs, and the number of PCIe connectors is satisfactory. The MWE 550 could have 6x SATA connectors, though, to help differentiate from the 500W and 450W models.

The MWE PSUs are available now. So far we don't have any information on their original manufacturer (OEM).

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Cooler Master MWE Series Features & Specs
P/NMWE 450/500/550/600/650
Capacities450W - 650W
Efficiency80 PLUS Bronze
Intel C6/C7 Power State SupportYes
Operating temperature0°C - 40°C
ProtectionsOver Voltage Protection Over Power Protection Over Temperature Protection Over Current Protection Short Circuit Protection
MTBF>100,000 hrs minimum
Hold-up Time16ms at 80% load
Cooling120mm Loop Dynamic Bearing Fan (Silencio FP)
Dimensions150 mm (W) x 86 mm (H) x 140 mm (D)
ComplianceATX12V v2.31, EPS 2.92
4-Pin Molex ConnectorsMWE 450/500/550: 3x MWE 600/650: 4x
SATA ConnectorsMWE 450/500/550: 4x MWE 600/650: 8x
PCIe ConnectorsMWE 450/500/550: 2x 6+2pin MWE 600/650: 4x 6+2pin
EPS ConnectorsMWE 450/500/550/600/650: 1x
+12V Max PowerMWE 450: 420W MWE 500: 460W MWE 550: 516W MWE 600: 600W MWE 650: 650W
Warranty3 years
Prices (exc. VAT)MWE 450: $50 MWE 500: $55 MWE 550: $60 MWE 600: $65 MWE 650: $70
Contributing Editor

Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.

  • orionfotl
    "So far we don't have any information on their original manufacturer (OEM)."

    They are made by HEC! The platform is the same as in Cougar LX. Which in turn is very similar to the platform of EVGA 700B and BQ650-750, but those have the PFC/PWN controller on a daughterboard instead of main PCB.

    Edit: At least the 600/650 models share this platform, not entirely sure about the others.
    Edit: There's a review showing the MWE Bronze 600 and 650W share that DC-DC platform However the promotional materials for 550W and lower wattage models show group regulation:

    So the 600-650W models are truly DC-DC, while 550W and lower may be group regulated, or only have 3.3V from DC-DC?
  • DragonAsta
    CM has a horrible background almost as bad as OCZ was when it comes to their power supplies, looks excellent on paper, yet in the real world tend to fall markedly short of "what is on the sticker" there is a reason why they are at a budget price point afterall. I am quite sure when you have the PSU pushing its max wattage say 600w the fan would be working overtime to keep in that 40c zone, or there will be problems....

    On another note, I really wish PSU, GPU makers would make the fans able to be super easy to remove to maintain them and/or replace them as needed without having to take a boat load of screws off or fight with the shroud. XFX had the right idea with 2 "clips" for some of the RX 400-500 offerings, but, not the right idea of excessive price premium...

    It should be kind of a mandatory thing IMO, really would not be hard for AMD/Nvidia to have that as a base specification that needs to be adhered to AND again IMO stop using those terrible hard to find "blowers" am sure one could just as easily use an off the shelf 38mm thick 92-120mm case fan on an incline to have the same "pressure" as "reference" design, would be by far easier to keep cleaner for longer, likely be much quieter, easier to replace once it "fails" which many tend to do...

    They (all computer makers/producers) really really need to BY DEFAULT be able to take the fans out to keep them clean, they could easily lock the rest of the PSU or GPU to prevent taking things off or whatever, but no reason why any maker makes the cooling fans near impossible to replace, Sony Microsoft am looking at you especially, custom fans locked in a box that you have to break the warranty void if removed sticker to replace the fan OR have to send it into them to replace, would be far better for them AND the consumer to be able to clean/replace the fans if they were readily accessible without monkeying with anything else....dummies ^.^