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Corsair AX1200 1200W Power Supply Review

Price: $329.99


Why is the word 'overkill' used so regularly on the forums, with regards to power supply selection? It's a word that could, at times, be equally applied to motherboard, memory and processor selection, so why isn't it? I'll tell you why - because this a site for PC enthusiasts who like to have the latest, the best and most powerful hardware, even if they don't always push it to its full potential. Why are power supplies so different? If a member asks for advice on which power supply will be sufficient to run their proposed new build then give it - although people's opinions will vary. If a member ask for opinions on the best 1200W power supply then give it, but don't go telling them they don't need that much power and they could save some money by going for a 500W unit, because it's not what was asked and it irks some people. It's the member's money at the end of the day and if they want a 1200W power supply for no other reason than because they can, then that's fine by me - that's what enthusiasts do sometimes. A 1200W power supply for a 400W rig brings the added benefits of a stress free, cool running and quiet power supply with a certain level of future proofing, though who knows what's on the horizon? Fit two GTX480 graphics cards in SLI and the 1200W power supply is not overkill in my opinion, but is instead the sensible option - especially if over clocking is your forte.

It'll be no surprise then, that this time around I will be having a look at a 1200W power supply from Corsair. Corsair have been a leading supplier of high-speed memory modules since 1994 and today offer a top quality line of power supplies alongside a wide range of memory products, solid state hard drives and PC enclosures for the mainstream and enthusiast PC market. The AX1200 is Corsair's current flagship power supply, boasting 1200W output and 80 Plus gold efficiency. The AX1200 was designed exclusively by Corsair and you won't find the board used anywhere else - would you release a board whose design brief was to be the best 1200W power supply in the world? Let's put the AX1200 through its paces and see if it can live up to its claims.


Closer Look:

The top cover of the box carries a photograph of the modular cable connector panel on the power supply along with model number, main feature list and in the top corner a professional series gold notice. Technical information is given on the back of the box which includes connector types (with photographs) and quantities, specification table, efficiency and fan noise level graphs and a brief description of some of the power supplies features in several different languages.











Both side panels carry the model number along with some of the main features in five different languages.



The box side again gives the model number and photograph of the fan grill. The opposite face carries the exact same image.


Not much to see here, a plain brown cardboard box within the box.


Lift the lid and the modular cable bag is neatly tucked down the side of the foam protected power supply. The power supply is enclosed in black felt draw string bag for further protection.



Bag enclosed power supply along with the full box contents, large modular cable box, power cord, user manual, cable ties and power supply fixing screws.



The Corsair AX1200 power supply is very well packaged with an adequate set of accessories. It is after all, a 'Professional Series' power supply, so you should expect extras, should'nt you? No problems so far, so let's move on and take a closer look at the power supply.

  1. Introduction & Closer Look
  2. Closer Look (The Power Supply)
  3. Specification & Features
  4. Testing: DC Voltage Load Regulation At 110VAC & 230VAC
  5. Testing: Efficiency, Power Factor & DC Quality
  6. Testing: Temperature, Noise Level & Fan Speed
  7. Conclusion
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