The Corsair Professional Series Gold power supply pushes the state of the art for reliable delivery of clean power under imperfect conditions. If you require mission-critical stability or you simply want one of the best power supplies available, the Corsair Professional Series 1200W modular power supply is for you.

All cables detach from the power supply. During installation, this gives you the flexibility of using only the cables you need for a clean system build with optimal airflow. And, when it’s time to replace or upgrade your power supply, it can be removed from your system without interfering with your cabling — the cables stay in place and connect to your new fully-modular Corsair power supply.

With 90% efficiency at 50% load, the Corsair Professional Series Gold power supply runs quieter, generates minimal excess heat, and saves you money every month. It’s earned the 80 Plus® Gold seal of approval, your guarantee that you’re making the right choice for smart, efficient power delivery.

Article why the AX1200 is a class leading PSU! (PDF)

• Supports the latest ATX12V v2.31 and EPS 2.92 standards and is backward compatible with ATX12V 2.2 and ATX12V 2.01 systems
• An ultra-quiet 140mm double ball-bearing fan delivers excellent airflow at an exceptionally low noise level by varying fan speed in response to temperature
• 80 Plus Gold certified to deliver at least 90% efficiency at 50% load
• Active Power Factor Correction (PFC) with PF value of 0.99
• Universal AC input from 90~264V
• No more hassle of flipping that tiny red switch to select the voltage input!
• A dedicated single +12V rail offers maximum compatibility with the latest components
• Over-voltage and over-current protection, under-voltage protection, and short circuit protection provide maximum safety to your critical system components
• High-quality Japanese capacitors provide uncompromised performance and reliability
• Completely modular cable system allows you to use only the cables you need
• Power supply upgrade and replacement is easy, as the cables only need to be disconnected at the power supply
• Low-profile, flat cable design reduces air friction and helps maximize airflow through your computer’s chassis
• A seven year warranty and lifetime access to Corsair’s legendary technical support and customer service
• Safety Approvals: UL, CUL, CE, CB, FCC Class B, TÜV, CCC, C-tick

Dimensions:	150mm(W) x 86mm(H) x 200mm(L)
MTBF:	100,000 hours
AC Input:	90-264V ~ 15A 50/60Hz
DC Output
+3.3V:	30A Combined +3.3V +5V - 180W
+5.0V:	30A Combined +3.3V +5V - 180W
+12V:	100.4A 1204.8W
-12V:	0.8A 9.6W
+5Vsb:	3.5A 17.5W
Connectors:	ATX 24 pin & 20 pin compatible EPS/ATX12V 8-4 pin x 2 PCI-E 6+2 pin x 6 SATA x 16 4 pin Peripheral x 12 Floppy x 2

02-16-2012
Reviewer: RL_dan (3)
I have 3 of these power supplies for my computers. Even before custom sleeving came out, or if you don''t want custom sleeving this is a beauty. I recommend your own research, but after reading 3 or 4 reviews - the excellent ripple tolerances to each channel and connectors makes this quite simply a top of the line well built power supply. (You can feel the quality the moment you lift it out of the box) - I have been sold ever since my first purchase. I haven''t needed anything over 1200 watts even with three AMD/ATI video cards in cross-fire mode, delta 5000 rpm fans, and ASUS Republic of Gamer motherboards. Side note: Some folks like single rail, I like multiple rails. I also have a silverstone 1500 watt that I use on my test bench which also works very well - but the AX1200 series is by far the best power supplies I''ve purchased. Noise level is very tolerable with the large 140mm top fan. Individual cable insertion, and removal is not cumbersome. Spend the coin and get the best - I can''t praise this beauty enough.

11-12-2011
Reviewer: eduncan911 (7)
Pros: Single 12V rail is what i was after due to my unique watercooling setup and high AMP draws across multiple SATA/Molex connectors (for the pumps and fans), along with the (3) 580 Hydro Copper 2 cards it had to push! My APC 1500VA UPS unit is screaming "Overload!" now because it hits 1.18 kWh at peak. Dang! Cons: Very Noisy! I spent months slowly planning the ultimate "drop-pin" quiet setup, and I achieve that with my current build of large radiators in the case that were specifically matched to the airflow of the 140mm fans I use, and the flow of the two pumps in series to generate a specific flowrate at a low 10% usage (can''t hear pumps). Turns out all was fraught because of the "idle" volume of this Corsair AX1200 PSU. Specifically, it''s the high pitch whining others are complaining (whining?) about. So freaking annoying to my ears. If it wasn''t the whining, it''d get a 5 but it''s enough for me to knock an egg off because I didn''t know it was THAT loud. Now, if you have several high end GPUs in SLI or Crossfire air-cooled, some loud radiator fans on your oversized rads, then you won''t hear a peep from this PSU (because everything else will be drowning it out)! But, if you are building a quiet PC, look elsewhere. Other Thoughts: I did tons of research on 3-way compatible PSU units with reviews. I ultimately decided on this one because of the single 12V rail, opposed to the rail issues other PSU units had. It seems the reviews on just about any 3-way PSU is a hit or miss (70 to 80% say Yay, the rest say Nay due to some problem). The one I got was fine, except for the noise I should have been warned about. Now, on the lookout for a PSU shootout about noises. Or, to disassemble this unit and put in a quieter fan perhaps (hopefully that is what is making the noise?).

09-16-2011
Reviewer: ()
With a short extension off the 12v rail I can now jump start the car when the girlfriend leaves the lights on with enough left over to run my dual quad core sli. Changed my life forever.

02-17-2011
Reviewer: The-Builder (5)
This is a very brutal power supply. I think I could wield with it.

10-22-2010
Reviewer: DouglasteR (1)
I have sticke''d with PcPowerCooling for years (510SLi, bought here too) and loved the legendary stability and performance of it. With the urge of more watts and the "death" of PcPC, i begin researching and finally found this almight power supply. Build quality is amazing and it''s whisper quiet, installation was flawless and in 5 minutes it was running, without any issues so far(and i dont believe i could have any)