Thermalright Peerless Assassin 120 SE CPU Cooler, 6 Heat Pipes AGHP Technology, Dual 120mm PWM Fans, 1550RPM Speed, for AMD:AM4 AM5/Intel LGA 1700/1150/1151/1200/1851,PC Cooler

The Thermalright Peerless Assassin 120 SE has honestly been one of the best upgrades I’ve put in my PC. I’ve been using it for a while now in my setup, and the performance has been amazing for an air cooler in this price range. It keeps temps low and stable even under load, and it just quietly does its job without any drama. The dual 120mm PWM fans move a lot of air while still staying fairly quiet, and the 6 heat pipe design really seems to make a difference in heat dissipation. Installation was straightforward, and it’s been fully reliable across long gaming and everyday use sessions. It also fits a wide range of sockets, which made it perfect for my setup. Overall, it’s easily one of the best or the best value cooler out there.

Upgraded my processor from a Ryzen 3900x 12 Core to the new 10th anniversary edition Ryzen 5800x3D and initially I decided to just reuse my cooler that I was using for my 3900x which was a Coolermaster Hyper 212 Black Edition. Boy was I in for a surprise when I was idling in the lower to mid 50's and maxing 91C running Cinebench tests on the 5800x3D. My 3900x was never running like that, though I could definitely feel warmth coming out of my tower all the time with my Coolermaster on my 3900x. After reading around the internet this one was recommended many times for the 5800x3D and decided for how cheap it was, got nothing to lose. Installation was actually easier than my Coolermaster with only having two screws to tighten versus 4 on my Coolermaster. Tightening them was a breeze, starting just a couple turns on one to get it threaded then going to the other one, do the same and just go back and forth until they're both snug, not overly tight. Had to raise the front fan a smidge due to my high-profile ram but it is what it is. After I got back up and running, I decided to go right back on Cinebench and run another multicore test, and to my surprise, the CPU only maxed at 81C for the whole test, with fluctuations between 78-80 most of the time. That's a great 10C drop in CPU temps from my last cooler. Also, my idling temps are now around 36-40C which is another roughly 10C drop. Also, the air coming out of my tower with this thing was pretty cool compared to my previous Coolermaster, even under heavy benching. The included fans were barely audible even during the Cinebench rendering. Like you could tell they ramped up if you were focused on it and really listened, but they were really quiet overall. No vibrations or weird noises like a lot of people complain about. I used Arctic MX-4 thermal paste instead of the included paste so I can't comment on how good it is. I think people tend to over exaggerate the size of this sometimes, but it is big, but not like anything that will stop you from putting it into a full-size tower. Overall, I'm more than happy and would easily recommend this for a 5800x3D on AM4.

I built my desktop computer approximately 2 years ago and recently I started having some issues with it. It would randomly just freeze completely causing me to manually shut it down. It was strange because it mostly happened when the PC was idle and/or not under heavy use. I finally narrowed it down to an overheating issue. I did some research and this is the fan and heatsink that I was recommended. The heatsink along with the fans are pretty large, so you will definitely need a sizeable case for it to fit. Also, you may need to mount your fan(s) slightly higher up on the heatsink in order to keep it from touching other components. I only had to raise one fan in order to get above my RAM. It ended up fitting perfectly in my case. It looks really nice, the color matches the rest of my components, and it’s quiet! The kit does come with proper mounting plates for both AMD and Intel, easy to use fan clips, and thermal paste. The installation was pretty easy and straightforward. I’ve had it installed for nearly a month and my computer has been stable and running much better and much cooler. It hasn’t frozen one single time, even under heavy use. I highly recommend this fan/heatsink if you’re in the market for one!

One of the best value CPU air coolers out there, a little unflattering but does the job well. I bought one originally for my sister for the Intel Core Ultra 5 265k and at light use it runs fairly cool 40-60. Now I do note that it runs fairly hot under full (100%) load 70-80 from what I remember. But I bought this for my Ryzen 9 5900 XT that I recently got, I'll update to see how hot it gets when I build it, oh and one final note the last 2 screws are kinda hard to get down on the first try but dont give up!. Cheers! Update: CPU Tested Ryzen 9 5900 XT After benchmarking I got it to reach ~3.6-3.7 GHZ sustained load for all 16 Cores @ ~62 C on stock settings pulling about 125 W. With limits set to motherboard and a -15 curve optimizer undervolt I got 4.3-4.4 GHZ sustained load @ 90 C pulling about 220 W

This CPU cooler is good value for the performance. Pros: -Kept a Ryzen 7 5800x cool under long gaming loads. Kept it around 60-70c max at 100% gaming load. -Cool dual tower design with two fans included. -Noise at low temps is basically silent -Actually helped ambient temps because the two fans guided air out of the case. Cons: -Installation is a bit trickier than an AIO cooler or stock coolers because it has two mounting screws. -Tried it with an i9 14th gen but needs a good case airflow. It did not do well in a sustained workload or in benchmarks. Didn’t wait for it to stabilize before closing the programs. i7 wasn’t bad and the 9800x3d was ok too. Overall a good cpu cooler for the money. I kept it in an AM4 build because it kept the same temps as a 240mm AIO. It also helps with directing airflow in the case with the two fans.

This cooler does an excellent job keeping temps under control. Even during heavier workloads, it handles heat really well and keeps everything running stable. For the price, the performance is honestly impressive and competes with much more expensive options. That said, installation took a bit more patience than expected. The mounting process isn’t difficult, but it can feel a little awkward, especially in tighter cases. Also, make sure you have enough clearance for RAM and your case, since it’s a fairly large cooler. Once it’s in, though, it’s solid—quiet, efficient, and reliable. If you don’t mind spending a few extra minutes on setup and double-checking fitment, it’s definitely worth it.

When I built my PC five years ago I installed a Dark Rock Pro 4 for my CPU cooler. It worked very well, but over the years the fans grew louder, the cooling became less efficient, and dust began to accumulate in hard to clean places. I decided to look for an affordable replacement and settled on the Thermalright Peerless Assassin. Overall, I believe this was a very good choice. Compared to my Dark Rock Pro 4, the Thermalright Peerless Assassin was a breeze to install. The LGA 155x bracket fit my motherboard and was easy to install. The thermal paste seemed thicker than other pastes I've used, but it went on neatly and is clearly working. The spring screws seem to have secured the cooler to the brackets very well. My biggest complaint with my old cooler was installing the fans. Happily, I can report that the Peerless Assassin's fan are easy to install, and remove if needed, and are secure. In terms of performance, I'm completely satisfied. The fans are not as quiet as my Dark Rock Pro 4 when I first installed it. However, they are an acceptable low volume. My PC has an Intel Core i7-8700k CPU and the cooler has no problem keeping it between 20C to 30C while idle or under a light load. I am no longer an avid gamer, and do not play modern video games, however I did test the thermals while playing Minecraft. It kept my CPU around 40C most of the time and would briefly shoot up to 50C when loading parts of the map. At less than 40 USD this cooler is a fantastic option for CPU cooling. Its significantly less expensive than comparable coolers, is easy to install, and delivers good performance.

Works great so far. 10900k at idle was sitting at around 30°c when the ambient temp in the room was 85°f. This does come with its own tube of thermal paste but I had some leftover Thermal Grizzly Kryonaut so I used that instead. Not sure how good or had the Thermalright paste is but its a pretty big tube of it, its enough for 5-6 PCs. Can't comment on how loud it is, I couldn't hear it but my room has a lot of background noise. All in all installation was fairly simple (its pretty much like any other after market air cooler) and it did include a 4pin splitter so if you only have one cpu fan header you can still run both fans that come with this cooler. And for the price its a no trainer. This cooler is essentially the modern era version of the Hyper 212 Evo.

Haven’t installed it yet because I’m unable to purchase DDR5 RAM due to its overhyped prices. About the cooler it's good.

I've recently upgraded my budget gaming laptop's CPU to Ryzen 7 5800X, fitting in a Mini ATX casing and basic neutral airflow. Have tried to recycle the previously Ryzen 5's stock fan, but the temperature hit 90 Celsius a couple of times and shutdown my PC. Had to resort to eco mode for awhile until I came across the raving review of TPA120SE. Reverting to normal mode (non-Eco) and installing TPA120SE, the same high intensity game doesn't cause the temperature to spike above 70 Celsius, usually floating between 43 - 65 Celsius. And the price point is incredible for the value it delivers!

Works great, fits great, good value

5 star.

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