Cooler Master Hyper RR-T4-18PK-R1 CPU Cooler with 4 Direct Contact Heatpipes, Intel/AMD with AM4 Support

I don’t overclock, so this cooler is probably overkill for me. However, after the stock cooler I had died, I needed something to replace it with. This works great. It allowed me to turn my computer on and lowered the temperatures I was seeing with the stock (around 50° C idle) by about 10° C. In game it was more noticeable, sometimes keeping the processer almost 20°. I would definitely recommend this to anyone who just wants to replace their stock cooler with something more robust.I will note that it wasn’t exactly the easiest thing to attach. My motherboard was a little tight and had several heat sinks around the CUP slot. The cooler is assembled in multiple parts, essentially a baseplate rig and the cooling tower. I was able to attach the baseplate stuff to the motherboard with no issues, but due to space limitations, it was very difficult to actually attach the tower firmly to the baseplate and lock it down. If you’re going to buy this, make sure there’s enough clearance to maneuver a bit around your CPU. While I don’t know how this compares to other nonstock coolers, compared to the stock one it’s huge and takes up quite a bit of room in my case. I also had a bit of trouble with proximity to my RAM. Luckily, it was designed in such a way that it clears the RAM height-wise, but because it’s above it, if I ever need to remove or replace the RAM, I’ll need to remove the cooler first.Pros- Quiet- Inexpensive- EffectiveCons- Large- The assembly directions can be a bit confusing at first- It’s a pain to put together by yourselfOverallIf you have the space and want an inexpensive cooler, I’d go for it. I’ve had it for about three months so far and had no issues. The fan is quiet and the whole assembly works like a charm. Once I actually got it installed successfully, there were no issues.

I'm running an ASUS Maximus VIII Hero motherboard, with an Intel Core i5 6600K CPU @ 3.5 GHz, 2 sticks of Corsair DDR4 8Gb RAM @ 2132 MHz, with an Artic Alpine 11 Pro fan, inside a Corsair Carbide Series 100R Mid Tower Case. Note that the Artic Alpine fan is a downblow design (It blows DOWN over the cooling fins at the CPU).When rendering video with this setup, the motherboard would automatically overclock the CPU to 100% load: 4.1 GHz, fan would spin to 2200+ RPM, and temps reached 192 F (89 C), well into the red danger zone. Removing both side panels reduced temps to 185 F (85C). Still in the danger zone.Max temps should be about 172 F (78 C). I picked up this fan and hoped for the best.After removing the Artic fan (I installed it correctly last year when I built this machine), it was obvious the fan wasn't making full contact with the CPU since the thin layer of pre-applied thermal paste was only disturbed on 1/4 of the left side of the CPU.The installation instructions for the Hyper T4 are not very clear, so I hit YouTube and watched a couple install videos to get a feel for a proper install. When I did the install this morning, it went smoothly although due to the case design, I had to uninstall the entire motherboard and related components to gain access to the mounting holes on the back of the motherboard (the case covers 2 of them). I had to remove the RAM sticks since they interfered with the needed room to install the clamping mechanism of the T4 hardware. After install, they went back into their slots without issue.The kit came with the "runny" thermal paste which the installer must apply so, now I KNOW there is full contact between the fan base and CPU.(See uploaded photos please) This fan is large, and can be oriented in only 1 way (it cannot be oriented so the airflow goes to the top or bottom of the case, only flowing front or back because the RAM sticks are in the way), but the fan itself is detachable, and can be mounted on the cooling fins to point airflow across the fins to the exhaust fan at the rear of the case (my setup), or mounted on the other side so it directs airflow across the fins towards the front of the case. It also has an extra pair of fan mounting brackets in the event you'd like to mount a second 120mm fan onto BOTH sides of the fins. I did not do this.The fan is very tall and the exposed ends of the heat pipes reach all the way to the case's side panel with no room to spare (maybe a mm or 2).Since the fan is directly above the RAM sticks, the heat from them are pulled in by the fan, whisked through the cooling fins, then exhausted out the rear of the case. I like this setup better than the downblow design of the previous fan (which blew the hot air from the CPU onto the mobo, the video card, and the RAM. Not nice.Just rendered (processed) a 15 minute test video, and now the motherboard will overclock to 4.4 GHz, the Hyper T4 fan's max speed was 905 RPM, and max temp of the CPU was 140 F (60 C). Well under the danger zone.5 stars. I am happy with this purchase, and I feel that so long as the fan functions, it will handle any demands I put on the CPU unless I attempt some extreme overclocking for the challenge of it (which I don't wish to do).I recommend this fan/heat sink, especially for the asking price of about $25 in August 2017. Thank you for reading my review!- AlleyratEDIT: I forgot to mention the fan is also quiet. I put both of the case's side panels back on my computer, re-rendered the test video and the fan speed reached a max of 705 RPM, and the CPU did not exceed 132 F (56 C) during that test, so it actually performs better when the case is enclosed. Motherboard overclocked the RAM to 2.9 GHz, and all temps were within very acceptable limits (mobo @ 95 F, PCH @ 110 F). Just so ya know. I'm one happy old duffer! :)

Before I get the why this is a great fan/heat-sink kit the one thing that could really be a deal-breaker for this is it's size! HUGE would be putting it mildly, and not only will you need a full-size ATX/Tower case, you may also have some issue with it running into graphics cards or other PCI-X cards installed. So seriously: measure beforehand, and especially measure before taking your old hink/fan out if this is an upgrade.Anyway, this product is amazingly quiet and my CPUs now run quite a bit cooler than they did beforehand. Nice design work and excellent quality. I have a dual-Xeon workstation and the original CPU fans were making work unbearable due to the whine and noise level, so I figured while I was at it I'd go ahead an upgrade the heat sinks to. Well worth the cost in every way, as now my PC runs extremely quiet and much cooler too! Installation is not exactly "difficult" but the instructions are small, vague and leave out quite a bit of detail, so find a video beforehand and take your time with the process.I removed the old thermal paste with an alcohol swap and put some new paste on after. I ended up having to move some expansion cards down a bit too in order to fit them both, and even then the second one BARELY squeezed in. Once installed though, it was so worth it! I can barely hear them now and I also know this will give my CPUs a bit longer life and potentially better performance.