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CORSAIR AXi Series, AX1500i, 1500 Watt, Fully Modular Digital Power Supply, 80+ Titanium Certified
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- The best enthusiast PC power supply you can own
- 80 PLUS Titanium certified efficiency
- Flat black, Low-Profile Modular Cables
- 1500 watts of reliable, continuous power delivery.Engineered to meet maximum power output at a server-grade 50°C temperature rating
- Corsair Link Integration for monitoring and adjustment of performance, noise, and OCP settings
- Ten year warranty: Your guarantee of reliable operation that will last across several system builds
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From the manufacturer
The best enthusiast PC power supply you can own
AX1500i defines the state of the art for enthusiast-grade PC power supplies. It provides 1500 Watts of continuous, digitally-controlled power on 15A circuits of 115V and higher, and 80 PLUS Titanium certification with an incredible 94 percent efficiency rating.
Zero RPM Fan mode ensures silent operation at low and medium loads, and the fully modular, low profile cable set makes for easy installation and great-looking builds. Corsair Link integration lets you monitor power usage and efficiency and customize performance, directly from your Windows desktop. The AX1500i lets you have it all, and it’s the power supply you want for your ultra-high performance PC.
Provides 1500 watts of reliable, continuous power for high-performance PCs
If you’re building ultra high-end performance systems or pushing world overclocking records, you know it when even 1200 watts just isn’t enough. The AX1500i reliably delivers 1500 watts of continuous – not peak – power on demand. And, you don’t need any special household wiring to make it happen, you’ll get 1500 Watts of clean, stable power even on 15 amp circuits of 115v and higher.
Digitally controlled power
The AX1500i is designed around a DSP for increased efficiency, tighter voltage regulation, and superior electrical specifications. The elegant, DSP-based design reduces internal component count and allows for better control of electrical ripple and noise.
- AX1500i power supply
- Modular cable pack
- Accessory bag with mounting hardware, cable ties, and case badge
- Corsair Link Digital interface cable
- Corsair Link USB cable
- AC power cord
Corsair Link desktop monitoring and control
Connect the AX1500i to a motherboard USB header with the included cable, and you can use Corsair Link to monitor power input, power output, efficiency, and internal temperature in real time. You can customize fan speed response, and set up your AX1500i to operate as a single-rail power supply, or with multiple virtual rails with customizable OCP points.
80 PLUS Titanium specification for ultra high efficiency
The AX1500i, simply put, approaches near-perfect efficiency like no other desktop PC power supply has ever done. Amazing efficiency has so many benefits – not only does it lower your operating costs, but it generates less heat, too. And that means that there’s less cooling required, which lowers noise.
Zero RPM Fan Mode for silent operation at low and medium loads
In fact, most of the time, no active cooling is required. The fan simply doesn’t spin. And when you’re pushing it hard, the thermally controlled fan adjusts its speed to match demand. The custom-designed fan is extra large, with a diameter of 140 millimeters for low noise even at full load, and it uses a fluid dynamic bearing for quiet, reliable operation.
Fully modular, low-profile cables
AX1500i is fully modular, which means that there are no permanently attached cables. This greatly simplifies installation and allows you to use only the cables you need, for a neater, cleaner build. This can also improve performance: fewer extraneous cables in your system can reduce airflow obstruction.
Compare with similar items
AX1500i is the best enthusiast PC power supply you can own. It provides 1500 Watts of continuous power - even on 115V 15 Amp circuits - and 80 PLUS Titanium certified efficiency of over 94%. Zero RPM Fan mode ensures silent operation at low and medium loads, and the fully modular, low profile cable set makes for easy installation and great-looking builds. Corsair Link integration lets you monitor power usage and efficiency and customize performance, directly from your Windows desktop. The AX1500i lets you have it all, and it's the power supply you want for your ultra-high performance PC.
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Top customer reviews
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Using the logging capabilities I plotted my unit's efficiency and included it here. You can see it matches their claim well. I attribute low wattage inefficencies to start up and shut down. Otherwise, my results match their spec's claim with 93% max efficency at 414 Watts.
The fan stays completly off at low heat, which is great. When it turns on it is very quiet.
Finally note that this power supply may be the largest wattage available in the smaller, "regular", form factor size. I cant fit the larger supplies with my radiator, so I luckily ended up with this power supply.
High quality build, heavy duty parts.
Full watt spec on 12V rail.
High wattage for small form factor.
"i" series has unique data collection capabilities.
Quiet, cool, and efficent operation. Zero fan speeds at low heat.
Expensive. Thats all I can think of. Rarely goes on sale or has special deals.
Edit - At this price point standard sleeved cables should be included.
This is a very top line consumer power supply with extra cpabilities. If you can justify the cost, you will probably be very happy with the supply. I am.
Three of the AX1200i units I received were afflicted by a very noticeable (and patently unacceptable) coil whine. This manifested itself under load (i.e., when gaming) as a high-pitched squeal that was both maddening and disappointing. The PC into which I had built this PSU is otherwise extremely quiet (even with two ASUS STRIX Radeon R9 390X Overclocked 8 GB DDR5 512-bit DisplayPort HDMI 1.4a DVI-I Gaming Graphics Card). After completing the initial build, I noticed that under load, the PSU squealed quite a great deal. Thankfully, replacing the hard drive in my build with a Thermaltake Level 10 Titanium case is not exceptionally difficult and does not require the "open-heart surgery" that such an event might require in other cases. So, I contacted Corsair and arranged for an advance replacement (wherein you must provide a credit card to which a temporary charge is applied) so that I could get a replacement unit in advance of returning the defective unit.
They promptly sent me the replacement unit and I returned the first unit to them.
The second unit also squealed under load. It was a different pitch and responded to different loads (i.e., games), but was altogether too loud to tolerate (especially at this price point).
Undeterred, I contacted Corsair. We repeated the process.
This time, because stock was depleted, they kindly shipped me one directly from Asia. It squealed under load.
To be clear, the squealing in all three units was not subtle. And it wasn't a function of me being finicky. It was the kind of sound anyone would notice.
Unfortunately, at this point, the unit had gone out of stock (wasn't available on Amazon and Corsair no longer had any on hand). They offered to replace it with the larger AX1500i; however, that unit is too physically to large (long) for my case. So we agreed that I would wait until they received new stock of the AX1500i, and that I would live with the squealing until then. We further agreed that they would first ship my unit to their technical support where they would test the unit for coil whine, establishing that the unit was perfectly silent before shipping it to me.
And so my multi-month wait began.
Four days ago, the whining power supply (the third) failed entirely. This voided the machine's operation entirely. Because putting up with squealing is a completely different ballgame from not having a PC that works, I contacted Corsair to see which unit they could provide to replace the failed unit while I continued to wait. They kindly sent me (in one business day) a Corsair HXi Series, HX1200i, 1200 Watt (1200W), Fully Modular Power Supply, 80+ Platinum Certified. I received it today and installed it. It is almost identical to the AX1200i except that it is not all digital (and consequently requires a USB connection from the PSU to the motherboard to get the fairly useless Corsair Link software to work). Notably, while it makes some sound under load, it's not nearly as noisy as any of the three AX1200i units.
And so I have a replacement unit while I continue to wait for Corsair to ship me an AX1200i replacement unit that operates the way a $310 PSU should.
While I can commend Corsair's customer service, this particular unit is simply not recommendable. The HX1200i may be a better unit for those looking for less noise (although I cannot comment on reliability).
I can say that in 2010, I built a different machine with a Corsair Professional Series HX1000 80 Plus Certified Modular Power Supply (CMPSU-1000HX). That PSU was virtually noiseless and presented no issues that I recall for nearly 6 years. All told, I believe Corsair makes good products (in all my PCs, I have Corsair memory with 2 X Corsair Vengeance LPX 16GB (4 x 4GB) DDR4 DRAM 3000MHz (PC4-24000) C15 memory kit for DDR4 Systems (CMK16GX4M4B3000C15R) in this build, and I currently use a Corsair Gaming K70 LUX RGB Mechanical Keyboard, Backlit RGB LED, Cherry MX RGB Blue and Corsair Gaming MM800 POLARIS RGB LED Lighting Hard Mouse Pad), but this is not among them.
Needless to say, I recommend buying a different model if you are interested in the Corsair brand.