• Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

Cooler Master PSUs Follow New EU Regulations


Editor & Senior Moderator
Staff member
Oct 9, 2007
34,912 (9.08/day)
Hyderabad, India
System Name Crypto-plague Survival Kit
Processor Intel Core i7-4770K
Motherboard ASUS Z97-A
Cooling Xigmatek Aegir CPU Cooler
Memory 2x 8GB Kingston HyperX Beast DDR3-1866
Video Card(s) 2x ZOTAC GeForce GTX 970
Storage ADATA SU800 512GB + Intel SSD320 120GB + Patriot WildFire 120GB
Display(s) Samsung U28D590 28-inch 4K UHD
Case Cooler Master CM690 1st Gen
Audio Device(s) Creative Sound Blaster Recon3D PCIe
Power Supply Corsair HX850W
Mouse Razer Abyssus
Keyboard Microsoft Sidewinder X4
Software Windows 10 Pro
Cooler Master, a leading creator, innovator and manufacturer of desktop components and more, announces today its PSU compliance list for the new EU regulations. Next to that we have upgraded the current B-series to a newer better version, the B ver. 2, to make sure these are also EU ready!

As of the 1st of July the new EU regulation for PSUs became in force. As part of the new EU regulation all internally installed power supplies must achieve a minimum level of efficiency in several load conditions and have a power factor of 0.9 at full load. This means that within the EU, focus will be on energy saving and nature friendly designs. The standby power consumption is regulated by the ErP lot6 and cannot exceed more than 0.5W in standby mode. All of Cooler Masters current PSU line-up follow these new regulations. To see all the test results you can visit this website.

Based on the new regulations in EU from 1st of July, the very successful B-series has been revised. A completely new circuit layout and new components make it compliant to the regulations. The biggest difference for the new B-series is that it now only has a single rail +12V DC out with a max current of 38A. This now means that all Cooler Master power supplies makes use of a single rail instead of multi rail.

Benefits of Single Rail
Cooler Master opts for single rail usage because of two simple reasons. The first one is that we believe it is better to have more power to one place which really needs the power, then to divide it on several lanes which might not be powerful enough. The second reason is the best one: it is just easier. Some people might not know which contact they need to use on a multi rail PSU but with a single rail you can't go wrong!

The Cooler Master B-series ver. 2 is available from the 1st of August 2014. Please check with your local Cooler Master representative for more information regarding availability and pricing.
Oct 2, 2004
12,936 (2.61/day)
System Name Dark Silence 2
Processor Intel Core i7 5820K @ 4.5 GHz (1.15V)
Motherboard MSI X99A Gaming 7
Cooling Cooler Master Nepton 120XL
Memory 32 GB DDR4 Kingston HyperX Fury 2400 MHz @ 2666 MHz
Video Card(s) AORUS GeForce GTX 1080Ti 11GB (2000/11100)
Storage Samsung 850 Pro 2TB SSD (3D V-NAND)
Display(s) ASUS VG248QE 144Hz 1ms (DisplayPort)
Case Corsair Carbide 330R Titanium
Audio Device(s) Creative Sound BlasterX AE-5 + Altec Lansing MX5021 (HiFi capacitors and OPAMP upgrade)
Power Supply BeQuiet! Dark Power Pro 11 750W
Mouse Logitech G502 Proteus Spectrum
Keyboard Cherry Stream XT Black
Software Windows 10 Pro 64-bit (Fall Creators Update)
I bet everyone who bought a Silver or Gold grade PSU few years ago, already easily meet these EU requirements.
Mar 26, 2010
7,692 (2.61/day)
Jakarta, Indonesia
System Name micropage7
Processor Intel G4400
Motherboard MSI B150M Bazooka D3
Cooling Stock ( Lapped )
Memory 16 Gb Team Xtreem DDR3
Video Card(s) Nvidia GTX460
Storage Seagate 1 TB, 5oo Gb and SSD A-Data 128 Gb
Display(s) LG 19 inch LCD Wide Screen
Case HP dx6120 MT
Audio Device(s) Stock
Power Supply Be Quiet 600 Watt
Software Windows 7 64-bit
Benchmark Scores Classified
good, just hope that it would improve their product in the future
Apr 24, 2007
105 (0.03/day)
I bet anyone that bought any quality PSU in the last decade meets these requirements. ;-)

But hey.... turn lemons into lemonade..... turn new efficiency requirements into marketing hype. :)
Jan 21, 2014
16 (0.01/day)
System Name Bleh
Processor Intel Core i5 750 2.66GHz w/ 2.8GHz Turbo
Motherboard Some Dell Mobo (no OC)
Cooling Intel i7 1150 Stock Cooler
Memory 2x4GB 1600MHz (works as 1333MHz thanks to the old architecture)
Video Card(s) I really don't want to say. I am ashamed of it
Storage 320GB Spinpoint 7200RPM
Display(s) LG 22" 16:10 1680x1050
Case Gigabyte 3DAurora 570 Aluminium Case
Audio Device(s) Onboard
Power Supply BeQuiet 430 Watt 80+
Mouse What?
Keyboard What what?
Software Windows 7 x64, Ubuntu Mate x64 (Soon to transition to Linux alone)
Does anyone know why B series don't have 80+ certification while having over 86% efficiency on 50% load?
Jan 25, 2011
498 (0.19/day)
Does this regulation effect all other electronics with PSUs and not just the PC?

CM Rene

Cooler Master Rep
Sep 8, 2014
1 (0.00/day)
Hi Guys,

80+ couldn´t made because 80+ test´s are in 115V ACin only.
This B ver.2 PSUs are focus for 230V market (EU) and have no multirange ACin.
80+ EU 230V certification is in process.

This new regulation contain a lot of electrical devices - PC and PSU are just one part.
It is not absolute necessary for end user and D.I.Y. market - but companies who sell complete systems need to follow it.

I am happy we have such "marketing" hype - this was one of the reason to improve the PSUs a lot.