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Corsair Professional Series  AX 750 Watt ATX/EPS Modular 80 PLUS Gold (AX750)

4.4 out of 5 stars 70 customer reviews
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  • 80PLUS Gold certified, delivering up to 90% energy efficiency at real world load conditions.
  • A Seven year warranty and lifetime access to Corsair's legendary technical support and customer service.
  • High-quality Japanese capacitors provide uncompromised performance and reliability.
  • An ultra-quiet double ball-bearing fan delivers excellent airflow at an exceptionally low noise level by varying fan speed in response to temperature.
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Technical Details

  • Brand Name: Corsair
  • Model Number: CMPSU-750AX

Product Description

Product Description

The Corsair AX750 power supply is the highest-quality mid-wattage power supply for enthusiasts who want uncompromising performance. With 80 PLUS Gold certification, a fully modular cable set and low noise levels, the AX750 is unrivalled at its wattage.

Unprecedented Power Protection
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 Professional Series Gold is for you.

A Fully Modular Cabling System
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.

Incredible Efficiency
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.

From the Manufacturer

The Corsair AX750 power supply is one of the highest-quality mid-wattage power supplies for the enthusiast who wants uncompromising performance. With 80 Plus Gold certification, a fully modular cable set, and low noise levels, the AX750 has no rivals at its wattage.

Product Features

  • 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 120mm 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
  • 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
  • Low-profile, flat cable design reduces air friction and helps maximize airflow through your computer's chassis
  • Safety Approvals: UL, CUL, CE, CB, FCC Class B, TÜV, CCC, C-tick
  • What the Experts are Saying...
    Award 1

    "Silence, performance, quality, and an attractive price make the AX750 very difficult to beat. This is easily one of the best power supplies on the market right now, and for that we're presenting Corsair with our Gold Editors' Choice award. You can get similar performance and quality, but the pricing is usually higher and unless you like waiting to see what the competition can bring to bear, this is a great high-end PSU." - AnandTech November 30, 2010

    Award 2

    "The AX750 is the third Corsair AX power supply we have reviewed and it has reaffirmed our opinion that the Professional Series Gold power supplies are the finest on the market, bar none. The 750 model is finished to the same exacting standards as the AX850 and AX1200 and we love the understated design and simple aesthetic appeal. This PSU will look great in any system, regardless of lighting or internal structure." - KitGuru September 11, 2010

    Corsair Professional Series - Specifications

    Specifications AX750 AX850 AX1200
    Wattage Output 750 850 1204
    Efficiency 80+ Gold 80+ Gold 80+ Gold
    Hybrid Silent Fan Control Yes Yes No
    +12V Rating 62 Amps 70 Amps 100.4 Amps
    Continuous Power Output 750 Watts @ 50°C 850 Watts @ 50°C 1204 Watts @ 50°C
    Warranty 7 Years 7 Years 7 Years
    Size 150mm(W) x 86mm(H) x 160mm(L) 150mm(W) x 86mm(H) x 160mm(L) 150mm(W) x 86mm(H) x 200mm(L)
    Power Supply Image
    Corsair AX750 PSU
    Corsair AX850 PSU
    Corsair AX1200 PSU
    More Information
    Click Here
    Click Here
    Click Here

    Efficiency
    AX750 Efficiency
    Fan Noise
    AX750 Noise

    Why choose a Corsair Professional Series AX power supply?

    Incredible Efficiency
    Incredible Efficiency

    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.

    Fully Modular Cabling
    Fully Modular Cabling System

    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.

    7 Year Warranty
    7 Year Warranty

    Corsair strives to ensure the quality and reliability of our power supplies, which is why the Corsair Professional Series Gold power supplies are provided with a seven year limited warranty. They are also backed by Corsair's legendary customer service and technical support.

    Connectors and Cable Length

    Connector Type Quantity Length (mm) Length (inches) Connectors per cable
    ATX Power Cable 1 600mm 23.62" 1
    EPS/ATX12V CPU Cable 2 600mm 23.62" 1
    PCI-E Cable (6+2 pin) 2 600mm 23.62" 2
    SATA Cable 2 850mm 33.46" 4
    SATA Cable 2 600mm 23.62" 2
    Peripheral Cable 2 850mm 33.46" 4
    Floppy Adapter 2 100mm 4" 1


    Product Information

    Product Dimensions 10 x 6 x 4 inches
    Item Weight 1.3 ounces
    Shipping Weight 8.3 pounds
    ASIN B003PJ6QWE
    Item model number CMPSU-750AX
    Customer Reviews
    4.4 out of 5 stars 70 customer reviews

    4.4 out of 5 stars
    Best Sellers Rank #1,368 in Electronics > Computers & Accessories > Computer Components > Power Supplies
    Date first available at Amazon.com June 3, 2010

    Technical Specification

    Warranty [pdf ]

    Warranty & Support

    Product Warranty: For warranty information about this product, please click here

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    Customer Questions & Answers

    Customer Reviews

    Top Customer Reviews

    By P. Ranalli on September 17, 2012
    Verified Purchase
    Allow me to begin this review by addressing a very common error that beginners make when building computers: going cheap on the power supply. Do not go cheap on your power supply! Power supplies are often taken for granted, but the fact of the matter is that a poor power supply can cause all sorts of problems from sluggish performance to crashes to actual hardware damage. Remember this: your power supply does exactly what it says, it supplies power to your entire system. Do not take that for granted, and please do not skimp on the purchase of your PSU.

    Now, that said, do you need a power supply of this level? Not necessarily. There are many great options at lower costs that will meet the needs of your typical user. What you want are highly rated, reputable power supplies. On the lower end, you may consider something like the Antec Earthwatts series, which are rock-solid for the money.

    But you're not reading this review because you want an Earthwatts; you are reading it because you're wondering, is it worth dishing out the cash on a Gold certified, modular PSU that comes packaged like it is a 200 year old bottle of scotch? The answer is yes, with one caveat: if you are trying to just put a computer together as cheaply as possible, then this PSU is not for you. As I stated earlier, there are reputable PSUs that you can find for much less.

    So, with that out of the way, let's talk about this particular PSU and why it is worth the money if you demand nothing but the best and have the budget for it. This PSU will deliver one of *the* most consistent levels of power to your system that is available today. It will live up to all of its ratings, unlike many cheaper PSUs which often turn out to supply far less consistent power than they claim.
    Read more ›
    2 Comments 13 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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    Verified Purchase
    Fantastic Packaging, Tons of cables and the best PSU I've ever used by far. You pay for what you get. Corsair/Seasonic best in its class and truly a pleasure to work with this unit,buy one!
    Comment 6 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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    Verified Purchase
    It works great. Be care if you are using duel power supplies. It does not play well with other power supplies.
    Comment 6 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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    Verified Purchase
    I have been using this PSU since Nov 2010, about a year and a half.

    Since then I have RMA'd it once to Corsair, thinking there was a problem with it. (the PSU had no problem, it was my RAM)
    I had no complications with Corsair and their customer service is top notch.
    I received the new PSU within 7 days, and it came brand new in an un-opened MFR box.

    This PSU is a single rail, gold psu made by Seasonic.
    I recommend this PSU to any of my friend that are making a $800+ computer.
    I feel if you are putting that much into the system you need a reliable PSU that will always work!

    The Corsair AX750 runs very cool, and I do not recall ever seeing the fan spin!
    Less heat the PSU produces the cooler the ambient temperature in your case will be.

    I use the AX750 to power my system:
    Intel i7 2600k
    Asus P8Z68-v PRO Mother Board
    2 x 4gb Mushkin 2133 RAM
    2 x 640gb WD black Sata 6 RAID 0
    Samsung 470 SSD 64GB
    LG BluRay Drive
    Corsair H60 CPU cooler
    4x 120mm fans
    1x 140mm fan
    Antec 300 case
    Comment One person found this helpful. Was this review helpful to you? Yes No Sending feedback...
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    Solid built. Very Quiet. Excellent Fan. I matched this PS to the Video Card that I used in the PC. Excellent choice for me. Highly recommend if you want quality over a low price PS. My Video Card only required 650 Watt but I generally go one notch higher than what is required. It has only been in operation for a short time but I do not anticipate any problems with it. The PS will come well packed in a box; it is not one of those cheap PS that you see out of a box in some PC Shops.
    Comment 5 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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    Verified Purchase
    Great for light overclocking. 1-2 gpu. I love overclocking and this thing takes it like a champ. Using a power meter and overclocking my 2 GPUs and my processor, I had this thing supplying a peak of 950W! I must say this is not advised if you do not know what you are doing. While my computer is idle (about 200w) my 12v rail sits at about 12.4volts. At full load(750w) it sits at about 12.05volts. These values are confirmed with a voltmeter(Fluke).
    I picked up a competitors 1200w power supply and returned it the next day because of terrible voltage droop. Most cheap power supplies have terrible voltage droop. I usually see 12v rails on cheap units drop somewhere between .75-1.5 volts at full load. For your average consumer it's ok, but those voltages are unacceptable for high stable overclocks.
    Comment One person found this helpful. Was this review helpful to you? Yes No Sending feedback...
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    Verified Purchase
    I've researched several other power supplies and ended up choosing this unit. From the moment I opened the box I could tell the unit was solid. The unit has a nice cloth pouch and also a separate pouch for the cables. The cables are thick to handle more than the stated wattage. I run a slightly overclocked system and I am happy with the unit so far.

    The unit is powering:
    Asus Crossfire IV
    AMD 1090T / 8GB XMS RAM 1333Mhz
    MSI Radeon Frozr II 6950
    DVD Burner
    2x 200mm fans
    1x 140mm fan
    Hyper 212 plus

    When I'm casually browsing the PSU fan does not spin. The fan starts going when I start playing games and even then the case fan is still significantly louder.

    What sold me on the pricier unit was the fact that I was looking for a long term power supply and the 7 year warranty was reassuring. I typically use my computers for several years, so I feel justified in purchasing a solid unit that draws less energy due to higher efficiency and built with quality parts. It was also very important to have the modular cables to help reduce clutter.

    It is true the wires are stiff but usually indicates thick gauge wire. The connectors are also tight fitting which is also something that I wouldn't classify as a negative attribute. The connections are solid once connected and hopefully you don't move out your peripherals too often.

    The PSU is running fairly easily right. It's good to know that I have the option to expand the peripherals(drives, cards, RAM, Fans) and even an additional GPU without really pushing the PSU.

    These are my first impressions and I'll update as time passes.
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