Review – RAIDMAX RX-1200AE 1200W SLI Certified CrossFire Ready 80 PLUS BRONZE Certified Modular Active PFC Power Supply


Let’s face it, even if you are not a gamer, you know that modern PCs need more and more power as the CPU frequencies are higher and more computer cores become available for general use. While certainly not destined for an average system, RAIDMAX’s new RX-1200AE 1200W ATX12V v2.3 / EPS12V SLI Certified CrossFire Ready 80 PLUS BRONZE Certified Modular Active PFC Power Supply is one of the most powerful PC power supplies available on the market and comes with all the bell and whistles you might expect including high efficiency, multiple PCI-E connectors in case you want to build a SLI system (and why else would you need a 1200W power supply?) and modular cables to help reduce the clutter.



The RX-1200AE comes in a very attractive carrying case that also contains a removable tray. I really like this kind of packaging because I can store screws and modular cables I do not use and easily find them later. I actually decided to use this carrying case to all my power supply related items including extra cables, screws, some additional cooling fans and LED systems to be used later. Really well thought packaging, and reusable at the same time. Kudos to RAIDMAX for this idea.


What 80 Plus Bronze Certified means

A quick glance in good old Wikipedia tells us that 80 PLUS is an initiative to promote efficiency in the computer power supplies. Number 80 comes from the minimal efficiency required to pass the certification at three load levels: 20%, 50%, 100%. An 80% efficiency means that from the input power, 80% is transferred as useful power to the computer components while 20% is lost as heat. The certification has 6 levels based on the efficiency, the base level has a minimum of 80% efficiency while Bronze has around 85%. For more information, take a look at the following table:

80 PLUS Test Type 115V Internal Non-Redundant 230V Internal Redundant
Fraction of Rated Load 10% 20% 50% 100% 10% 20% 50% 100%
80 PLUS 80% 80% 80%
80 PLUS Bronze 82% 85% 82% 81% 85% 81%
80 PLUS Silver 85% 88% 85% 85% 89% 85%
80 PLUS Gold 87% 90% 87% 88% 92% 88%
80 PLUS Platinum 90% 92% 89% 90% 94% 91%
80 PLUS Titanium 90% 94% 96% 91%

Technical Specifications


– Modularized Cable design
– ATX 12V EPS12V: Supports ATX 12V2.3 version and EPS12V 2.92 version.
– Active PFC, Quad+12v Rails. Design supports all HIGH-END Multi-Core GPU graphic cards.
– Optimized Silent Design 135 MM Fan
– PCI-E Dedicated PCI-Express VGA Connector
– High compatibility. (3.3v, 5v, 12v, with standby design)

– Industrial grade protection circuitry Prevents damage resulting from SCP, OCP, OVP, UVP, OPP.

– 80 PLUS GOLD Certified for energy saving



AC INUT: AC 115V-230V, 15A , 50-60HZ
DC OUTPUT: +3.3V +5V +12V1 +12V2 +12V3 +12V4 -12V +5VSB
MAX OUTPUT CURRENT: 24A 30A 40A 40A 40A 40A 0.5A 3.0A

Inside the Box

The box contains the power supply itself, a large number of modular cables sure to satisfy even the most stringent needs. Even while building a powerful SLI system, half the cables remained unused. I included a table of connections available and you can see 6 PCI-E 6+2 PIN outputs, 8 SATA and 8 MOLEX 4 PIN outputs available as well. There are also four main 12V circuits available at 40A each.A rubber buffer to be connected between the power supply and case it is also a nice touch.


Inside the Power Supply

RX-1200AE is the most densely packed power supply I have ever seen. It was actually hard to take photos of the circuits because there was just not enough space for the camera for lateral shots. You can see several more photos in the gallery at the end of the review. Interesting to note is the silent but powerful 135mm fan at 2000RPM.


Load Testing

A test using a dummy load device used for stress test provides the following values:

RX-1200AE Current output under load (A)

Load (%)  Fraction of Load +12V1  +12V2  +12V3  +12V4 -12V +5V  +3.3V  +5VSB
 20  Light  4.4  4.2  4.2  4  0.1  4.1  4.1  0.6
 50  Typical  11  10.5  10.5  10  0.25  10.25  10.25  1.5
 100  Full  21  21  21  21  0.5  20.5  20.5  3

RX-1200AE Voltage output under load (V)

Load (%) Fraction of Load Input Watts +12V1 +12V2 +12V3 +12V4 -12V +5V +3.3V 5VSB Dissipated Power(W) Output Power (W) Efficiency (%) Power Factor
 20  Light  283.9  12.31  12.31  12.26  12.22  -11.74  5.08  3.39  5.09  38.7  245.2  86.4  0.993
 50  Typical  695.6  12.27  12.26  12.16  12.11  -11.76  5.02  3.32  4.98  87.3  608.3  87.4  0.998
 100  Full  1446  12.21  12.16  11.95  11.92  -11.92  4.93  3.25  4.8  244.9  1201.1  83.1  0.999

Interesting to observe that the peak efficiency of 87.4% is obtained at a 50% load, presumably where most of the systems will be.


RAIDMAX RX-1200AE proves itself as a real winner among the power supplies at this price and power range. It keeps relatively cool at medium loads, offers a really good 87.4% efficiency at 50% and a respectable 83.1% at full load fully qualifying for the 80 Bronze certification while offering a multitude of outputs for even the most loaded gaming rigs. All this is packed in a regular sized power supply designed to fit in virtually all the modern cases currently available on the market.


  • modular, large number of outputs
  • compact
  • relatively quiet


  • none, really. Maybe a bit on the expensive side, but cheaper than the competitor products in this category. And let’s be honest, if you build a system requiring this kind of power supply, the price of the PUu should be the least of your worries.




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