Pros: Literally everything about this unit is in the "pros"...
Corsair Link software is intuitive and easy to use
The radiator is thick, solid, tight
The pump is super quiet and works great
The setup is simple
Easy to follow directions
Sata, fan cables and usb cable are all placed in easy to conceal areas

I upgraded to this from a Evo212. I was getting 30-32 on my cpu @ idle and around 55-56 under heavy loads. My gpu (970) would hit 70-72 while pushing it in games like Shadows of Mordor, Witcher 3 and GTAV

I'm running this as a push/exhaust it the top. I have 3 120mm fans intake on front with a 140mm exhaust out rear and the 2 140mm exhaust through radiator out the top

With this unit my cpu idles around 22-24 and I haven't seen it go over 44 under heavy load. That's over 10 degrees improvement under load. With the neutral to negative air pressure and the improved airflow allowed from getting rid of the 212 radiator my gpu temps have also dropped to around 66-68 under similar loads

I couldn't be happier with the performance

Plus it looks beautiful

Cons: None. I have absolutely nothing negative to say about this product.

Other Thoughts: Simple, effective and beautiful; this thing does exactly what it was designed for

Pros: Cooler was easy to install out of the box, the instructions where easy for me to follow. The software was not finicky to get working. The unit is not very loud, the sound levels it produces do not bother me one bit. It outperforms the stock CPU coolers by leaps and bounds. It also outperformed my after marker copper heat pipe cooler as well. ( See recorded temps in other section ) It's nice that the tubing seems to have a bit of a built in swivel on the pump side, giving you a little bit of flexibility to install the radiator to fit your case. (I installed my cooler in my Corsair Air A540 Cube and it fit easily) The build quality as a whole feels durable and sturdy. The radiator mounts give you options to adjust and setup mounting and fan positions with ease.

Cons: I feel that the power cable going to the unit should be a bit beefier and that there might be a better way to connect everything up to the unit, there is a small handful of cables that come out of the pump that sits on the water block to connect to everything. The fans do make a bit of noise, but I was not bothered by them one bit. While the unit did perform well, I think it could do better cooling wise, but it's performance and stability did not disappoint. The software seems to have a glitch that will hopefully be fixed in a later update, it would, after a while, start to take up 100% usage of 1 of my cpu cores, not sure why, but Googling this confirmed I am not the only one who has had this issue. The software could use some more options for the light on the cooler, but that does not affect how it functions as a cooler. The software could use to be a bit more intuitive.

Other Thoughts: I did multiple tests of the unit against 2 other coolers. A stock Intel Cooler and an After Market Copper Heat Pipe Cooler. The hardware this cooler was used in / on was is as follows: Corsair Air A540 Case, Asus Motherboard, Intel Core i7 4790K, 16gb Corsair DDR3 Memory, 1000 Watt Antec PSU. As for my testing, 4 things to note before I show my results. First the ambient room temperature was between 19C (67F) ~ 21C (70F). Second, testing with the stock Intel cooler caused my CPU to start thermal throttling and slowing down as far as 3.79 Ghz from 4.2 Ghz Idle, which both the Corsair H115i and the aftermarket cooler I had did cause thermal throttling occur. Third, tests ran for 45 minutes each to allow temperatures to stabilize, running Prime 95 to stress the CPU, temps were read from the Asus motherboard software that came with my motherboard. Fourth, I had the fans on my radiator in a pull configuration, exhausting out of the top of my case.

Stock Intel Cooler - CPU Throttled Clock Speed
Case Fans at Full Speed Including Cooler Fan
31C Idle 88C Full load (throttling to 3.99 Ghz)
Case Fans Under Motherboard Speed Control
40C Idle 88C Full load (throttling to 3.79 Ghz)

Aftermarket Copper Cooler - CPU Clock stayed at 4.2 Ghz
Case Fans at Full Speed Including Cooler Fan
27C Idle 74C Full load
Case Fans Under Motherboard Speed Control
28C Idle 80C Full load

Corsair H115i Cooler - CPU Clock stayed at 4.2 Ghz - Performance Mode
Case Fans At Full Speed
28C Idle 58C Full load
Case fans Under Motherboard Speed Control
30C Idle 59C Full load

Corsair H115i Cooler - CPU Clock stayed at 4.2 Ghz - Stock Mode
Case Fans At Full Speed
29C Idle 60C Full load
Case fans Under Motherboard Speed Control
33C Idle 60C Full load

Overall I was very happy with the unit and it performs well. If Corsair can fix the software bug (High CPU Usage) and consider adding some more features and make it more intuitive that would be great! I will definitely look into more Corsair cooling products for future builds.

Pros: great performance
great price
clean and easy installation
looks great

Cons: none

Other Thoughts: Just a few things to point out that has already been mentioned. It does take up quite a bit of room and the hoses come down (if properly installed) in the top left of my motherboard where I have a few plugins that interfere so I had to slide it back further into the case then I would have wanted. Some people mentioned that it was almost silent, I am more inclined to think these people suffer from hearing loss. I wouldn't call it silent but instead, the noise level for me basically remained the same since I removed two fans that I had in the case but replaced them with the two from the cooler. There were a few vague areas in the installation but easy enough to figure out. They really individually packet and label the different studs they provide depending on what socket of motherboard. You have to figure these out on your own and the same thing with the plugins for the cpu block. Most of these are easy to know and plug in but I had one 4pin connector that I hope was an optional for an old style of power supply because I didn't have anything to match it with my modular Corsair power supply.

Pros: The entire product appears to be well built and doesn't look as though Corsair cut any obvious corners with this product. The hoses are very thick and the seals look like they aren't going to be coming off any time soon. The radiator, as expected is a thin 280mm one and fit nicely into the front of my NXTZ S340 case. The fans are slightly larger than a typical 120mm fan and move alot more air which I love. They are not super silent but acceptable. More air movement = better cooling. Speaking of the fan, there are no lights. Which is fine with me. The pump housing has some RBG lights and can be configured to either blue, red or white which is awesome.
Some other Pro's that I like about this item are:
-CPU runs cooler
-Internal temps are lower
- More case air-flow
-Relatively straight forward installation
-Inexpensive for a water cooled solution
-5 year manufacturer warranty (great peace of mind)

Cons: Well it is a very nice unit and does do what it was designed to do and that is to fit in newer gen cases and provide extreme cooling for the cpu. For me I would like to see better overall fans included in the kit. The ones included are great but adding some RBG function to them would be welcome.
Some other Con's:
-Installation can be challenging
-Corsair link buggy but Corsair releases constant updates so thats a relief

Other Thoughts: In conclusion to this essay the corsair h115i is a great aio. Easy installation, excellent performance, cool, and quiet with customizable rgb lighting. The h115i is great cooler for anyone looking into the liquid cooling spectrum, a great middle ground between bulky air coolers, and expensive custom loops. Just make sure your case can fit it.

Pros: With each generation Corsair continues to improve on quality and performance. Not that long ago getting a 280MM radiator was a problem as you had to be really careful that it would fit in your case. So many cases has evolved addressing this issue that this really isn't a limitation anymore. I put this cooler in the front of a Fractal Define S and had plenty of space. Setup was 4 140mm Thermaltake Riing fans in push/pull and I have to say I was shocked at the performance. Rig was 5960X with 64GB RAM on a ASUS Sabertooth X99 board and overclocked to 4.6GHz. The amazing part was that the idle temps were 11C, ummm, seriously? I thought it was a mistake at first and checked a few different ways and that's really how cool it was. At load it would get in high 40's to low 50's. I OCd a little higher by increasing voltage to 1.4, but couldn't keep it stable at 4.8 under load and simply no need to push voltage any higher even though I was tempted.... 4.6Ghz for this processor is just fine with me. Link software isn't my favorite, but it's easy to change color of the LED which is cool if you want to match the LED scheme of your internal fans. If you get quality 140mm fans then they will run virtually silent.

Installation is stupid easy - another credit to Corsair for continuously trying to improve their products.

Cons: I never use the Corsair fans that come with these units because they are just loud. I hope at some point Corsair just offers some of their LED SP140MM fans as an option vs cheaping out on fans. You could argue that they just want you to buy their more expensive fans separately, but in my case I went with Thermaltake Riing which I think are superior to anything Corsair is offering right now anyway.

Other Thoughts: Fan profiles using Link software are limitless. I personally don't spend a lot of time with that, but if you really like that sort of thing you will like the options. You can even have the LED change colors once your CPU hits a certain temp. Option to enable/disable warning color change or LED entirely if you don't like it.

Pros: - Pretty easy to install, just make sure you use the appropriate mounting plate - one for INTEL and the other for AMD chips.
- Silver paste is already applied for you!
- Keeps your hot-working CPU cooooool. For example, my AMD FX-9590 (4.7 to 5+ Gig) idles about 20C and loaded around 40C.
- No water or coolant to add. All that liquid stuff is already added at the factory. This makes installation a breeze!

Cons: - None that I have found, so far.

Other Thoughts: - This is the way to go for water-cooling that heat-generating beast! Prior to this cooler, I used a Zalman, that did a good job on a less heat-producing CPU...keeping me around 40C under load.

Pros: I would highly suggest this cooler for anyone wanting to get into or try out water cooling. Corsair did such an amazing job with this cooler. It looks amazing in my case and on top of that it made it almost silent.
Installation instructions are simple and easy to follow and I had no trouble at all installing this cooler. Before with my Hyper 212 I was running around the high 60C now I’m running at a cool 45-50C which I am loving. The off black fans are quiet and look nicer than previous ones that were just a flat black.
Corsair Link is awesome! I really like all the information that it gives you about your cooler. Plus having the ability to change LED colors is nice when you want to match your case’s color theme.

Cons: None that I can find so far

Other Thoughts: Overall I really, really love this cooler. It’s quiet and the thermal readings blow my air cooled system out of the water.
I would defiantly recommend this product to anyone wanting to get into water cooling. Its reasonable price makes it a good competitor for other AIO coolers out there. Corsair link is also something that is very handy to have especially when you want to know as much as possible about your pump and its thermals.

Pros: - lots of cooling capacity
- compared to standard fan, this is unit seems quieter (overall, especially under load)
- build quality of the components feels (and appears) to well made
- ability to monitor status of various facets via software
- Corsair has a couple options for cases to 'mate' liquid coolers (or vice-versa)
- instructions are clear and depict specifics to ensure proper installation
- nicely packaged

Cons: - Size. If you're moving into the 'performance liquid cooling' arena - expect to have a significant amount of additional real estate inside the case and possibly run into instances of having to do some case customization.
- Selection of 'liquid cooling optimized' cases is still somewhat limited, but growing.

Other Thoughts: - will be looking to move all future builds from standard fan to liquid cooling, particularly Corsair's solutions.
- unless you want your CPU to double as a 'cooktop' under load, this is absolutely the way to go.
- installation was easy and straight forward. Even the most meticulous system builders (or consumers) should find this easy to install.
- while the fans are reasonably quiet, would like to try to find a suitable replacement that would be quieter and/or capable of moving more air (at the same RPM range) to further reduce generation of sound.

Pros: Pump runs at 1400 RPM, smaller noise than H110i.
Tested with 5930k boost up to 4.4 GHz and maintained 45 C.

Cons: Not really works with HAF X, I installed as fans above the radiator and let the air in take. I think the proper way is fans below radiator and air in take.
Unlike H110i GT, the speed of two fans can not be set up separately.

Other Thoughts: The pump is designed as circle instead of rectangular. This allowed larger pump, which allows slower pump speed. Avg pump speed for H110i is around 2400. But the circle make the compound area smaller than the LGA 2011- V3 cpu. I don'd know if it is the case for LGA 1150. But overall the pump did a very good job.

Pros: The Corsair Hydro Series H115i is a long awaited 280 (140mm x 2) all in one (AIO) liquid cooler. The market for AIO coolers has traditionally been 120 or 240 only coolers. The reason for this 120mm (and multiples thereof) ubiquity is that most case manufactures have only 120mm fan mounts. Specifically for this review my favorite manufactures, Silverstone, Lian li, In Win have almost exclusively 120mm based chasses’. The only exception to this has been Corsair, who to my surprise has both 120mm and 140mm support in almost all of their cases (Graphite, Obsidian, Carbide & Vengeance). I had owned the Corsair Vengeance C70 Military Green case once upon a time which supports a top 240 & 280 reservoir and although I mounted a custom 240 I always felt the case was not being fully utilized….I had at the time wished there was an easier way to liquid cool such a system AND fill the radiator mounting space….introduce the H115, the answer to my desires unfortunately 2 years late.

Unlike most AIO liquid coolers made by corsair, (and most other manufactures), the pump which is embedded in the waterblock was powered by Molex….a power plug which dates back to 1986 when hard disk drives were powered by them (I still have a HDD which is 10in x 6in pulled from an only 1986 Mac). Therefore many PSU manufactures have kept this power plug in their lineup because although HDDs now use SATA many CD/DVD drives still use Molex. Given that the modern trend has been away from optical media most users have no HDD or perhaps slim HDDs, which are powered by slim SATA power plugs, or perhaps choose to have no CD/DVD drive at all. Therefore there really is no place for Molex connectors in modern builds and Corsair is the first AIO manufactured that ive seen who has realized this and by choosing to power their H115i pump with a SATA power plug WILL help push this long obsolete Molex power connector out of cases; Hats off to you Corsair.

Having spent may hours/days removing air bubbles from custom liquid loops which notoriously cause pump noise I was pleasantly surprised by how silent the pump operated, and thus how bubble free the liquid must truly be in this AIO system. I really enjoyed how large the cooling plate was and that it is made of copper, a relatively inexpensive and exceptional heat conductive material. I have seen other manufactures use other, cheaper, materials and there are certainly effects on temperatures.

I love the color of the fans. Previous generations of Corsair's AIO coolers have been boring black fans which were a little loud. These off grey fans are stylish and relatively quiet

Cons: This product didnt come out sooner!

Other Thoughts: Should you buy the Corsair H115i?


If you have a case which can accept a dual 140mm (280mm) radiator:

YES! The Corsair H115i is an exceptionally easy to install AIO cooler which is the first ive known which accommodates those of us who have room for a 280


If you have room for a 280 AND you have space issues in your case:

YES! The Corsair H115i has eliminated the Molex plug for the SATA standard and given that you most likely are also powering a few SSDs/HDDs you can use a free SATA power plug for your pump.


If you want to liquid cool your computer without investing in a custom loop:

Yes, a custom loop will cost you more time, money, and aggravation….and for many users the H115i is going to make many customers very happy. However the only cases that Ive seen which can accommodate a 280 are Corsair Cases so worst case you’ll be accused of a fanboy which isn’t the worst thing given how well designed the Corsair H115i turned out to be

As for me, I’m impressed