

❄️ Stay chill, game hard — cool like a pro with Thermalright Peerless Assassin 120 SE!
The Thermalright Peerless Assassin 120 SE is a high-performance CPU air cooler featuring 6 pure copper heat pipes with advanced AGHP technology, dual 120mm PWM fans delivering up to 66.17 CFM airflow, and a noise level under 25.6 dB. Compatible with a wide range of Intel and AMD sockets, it offers exceptional cooling efficiency and quiet operation in a sleek aluminum design, perfect for demanding gaming and professional workloads.












| ASIN | B0B4G8QKZP |
| Air Flow Capacity | 66.17 Cubic Feet Per Minute |
| Batteries Required? | No |
| Best Sellers Rank | 2,386 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 19 in Fans & Cooling |
| Colour | PA120 SE |
| Customer Reviews | 4.7 4.7 out of 5 stars (786) |
| Date First Available | 18 Jun. 2022 |
| Item Weight | 1.36 kg |
| Manufacturer | THERMALRIGHT |
| Manufacturer reference | PA120SE D6-Y 1700 |
| Material | PA120 SE |
| Noise Level | 25.6 Decibels |
| Part number | PA120SE D6-Y 1700 |
| Product Dimensions | 12.7 x 10.16 x 15.24 cm; 1.36 kg |
| Size | 6 Heatpipes |
| Style | PA120 SE |
| Voltage | 12 Volts (DC) |
| Wattage | 7 watts |
Z**1
SIGNIFICANTLY Lowered My CPU Temps
My CPU temps were hitting up to 90-100°C on demanding games with the STOCK intel cooler (was playing Oblivion Remastered, so maybe I should say poorly optimised games lol). I’ve got an i5 14400f paired with an RTX 4070, so these temps were crazy high, and straight up dangerous for my CPU. Now, I know the stock intel cooler is generally not great, but I was not expecting the crazy results that this CPU cooler gave me. I bought this for £27 (I think on sale). And, for £27, it lowered my temps from 90-100°C in Oblivion, to 50-55°C — incredible. This game often utilises up to 70% of my CPU, and sometimes higher, and the fact that I’m getting such low temps is amazing. I was honestly expecting, and hoping for, maybe 70-75°C on this game. I am really pleased with this CPU cooler, and it seems to be working amazingly. It gets kinda noisy in-game, but still NOT as loud as the Stock Intel Cooler. It’s audible when the fans start speeding up in more demanding games/environments, but I assume it’s to maintain those lower temps. If you really wanted to, you could create a custom fan curve, and you’d probably solve this issue. It’s honestly not an issue for me, it’s really not that loud at all. Also, at least it doesn’t turn my room into a sauna like the stock intel cooler! TL;DR: good quality, really nice temps with my CPU, really affordable price, and is compatible with AM4 boards, AM5 I believe as well (double check that), in addition to Intel boards. Can get a bit noisy, create a custom fan curve or buy a more premium CPU cooler or even a Liquid Cooler if you are sensitive or disturbed by fan noise. I used to play PS4 all the time, so I can tolerate fan noise pretty well, since that console was a jet engine. But honestly, it’s not that loud at all, just audible. Even playing with speakers, and no headphones, the fan noise doesn’t bother me.
O**L
Great price, great cooling.
Great price for great cooling performance. Kept a Ryzen 5800x cool, while still being reasonable with noise. Would buy again without a second thought. Good build quality. It is nigh silent in all but the most demanding situations. Good compatibility with a nice range of sockets. Installation was easy other than trying to get your hand in between the cooler and case to plug the wires into the motherboard - but that is normal for tower air coolers and depends on your case. Visuals are good, nothing too out there.
A**S
Looks great in a white case and adequately cools my Ryzen 7
Matches my new case and looks great, fits perfectly and compatible with my board and CPU, rbg is pretty and it does the job of cooling my Ryzen 7 perfectly, was very easy to install, CPU coolers are always stressful to install but had very few issues with this and the fans being detachable is very helpful to reach the board overall functional and good value.
C**V
Effective, good looking, cheap but noisy
Mounting the cooler is relatively easy, however, you have to be careful to not hit/damage other components due to its sheer size. This in itself could also cause problems with higher RAM sticks, or RAM on top of which you want to mount some fans. For instance, I'm using DDR5-8000 memory which gets quite hot under load without cooling (~60C+) so I'm using some top-mounted fans to cool it down. In this scenario, unfortunately I cannot use the ThermalRight cooler as with it mounted, there is no more room for the RAM fans. And no, the front (push) fan on the cooler doesn't help dissipating the heat from the RAM as it sits right on top of it. Moreover, I had to raise the front fan slightly above the heatsink as it wouldn't fit otherwise due to the RAM sticks themselves. The RAM sticks are G-Skill Trident Z series which are not a high-profile RAM like let's say the Corsair Dominator, so if you have the latter, you might run into issues mounting this beast. The cooling performance is rather good, having installed it on an i9-14900K, with Arctic MX6 thermal paste, the load temps were not above 85-86C however, the noise the fans make is very annoying. The fans are audible even at low RPM, let alone in high RPM. Otherwise, the cooler looks nice in white, ARGB lighting is good, however, I could not put up with the fans noise so went for a AIO cooler instead. One of the main advantages of this cooler though is its price, which in this category is unbeatable, incomparably cheaper than an AIO option. So in conclusion, if you're not bothered by the fan noise, possible RAM clearance issues and bulkiness of the unit itself then for this price think no further.
H**Z
Outstanding cooler with excellent performance
This Thermalright CPU cooler is impressive in both performance and design. Installation was straightforward, and all the mounting hardware was included and well-made. The dual 120mm fans provide excellent airflow, keeping my CPU temperatures consistently low even under heavy load. The six heat pipes do a fantastic job of dissipating heat efficiently. I also love the ARGB design. The lighting is bright, vibrant, and fully compatible with my motherboard software, which adds a sleek aesthetic to my build. The white finish looks clean and modern, complementing other components perfectly. Noise levels are minimal, even when the fans ramp up during intensive tasks, which makes it perfect for both gaming and productivity work. Overall, this cooler combines excellent cooling performance, quiet operation, and stylish design. It is ideal for anyone looking to keep their CPU cool while adding a touch of flair to their build. Highly recommended.
W**D
10/10 Cooler
I’ve been using this CPU cooler for the past year and it’s been completely reliable. It’s kept temperatures under control without any issues and performs exactly as it should. Installation was straightforward, and it’s been running consistently ever since. For the price, it offers great value and does a solid job. I’d happily use the same one again.
T**T
J’ai voulu changer de mon beQuiet! Dark Rock Pro 4 car il était trop imposant, trop difficile à manipuler, et ne semblait pas refroidir correctement mon processeur (surtout au vu du prix). J’avais déjà vu pas mal de reviews et de tests qui parlaient de ce Peerless Assassin, et j’avais même fait une config pour un ami dans laquelle j’avais mis ce ventirad. Et pour le prix, laissez-moi vous dire qu’on en a pour notre argent. ✅ POINTS POSITIFS : • Prix imbattable • Specs imbattables (surtout vu le prix) • Qualité de fabrication • Plusieurs adaptateurs fournis • Boîte sobre mais efficace • Silencieux • Très facile à installer (surtout si je compare avec le beQuiet). ❌ POINTS NÉGATIFS : • Assez imposant (donc attention avec la ram clearance). Mais ça reste relatif, et avec de la ram low profile ça passe largement. Et puis ça permet aussi de très bonne performances. ⏩ CONCLUSION : On n’entendait pas vraiment parler de Thermalright ces dernières années, mais quel retour en force ! Pour environ la moitié du prix de mon beQuiet, j’ai quelque chose de plus performant, plus simple à installer/désinstaller, moins imposant. Les reviews disaient donc vrai. Et à ce prix là, difficile de faire mieux pour le moment. En tout cas, c’est une marque à suivre pour l’avenir. Ce produit est la preuve qu’on peut faire des ventirads pas chers, performants et silencieux : certains devraient s’en inspirer. ⭐️5/5
R**Y
Perfect transaction highly recommended
A**R
Très facile à installer, la puissance de refroidissement qu'il couvre à ce prix là est imbattable.
E**N
I recently upgraded from a Ryzen 7 2700x to a 5700x, and with the stock AMD Prism cooler, I was seeing temps up to 74c while gaming. Not a dangerous temp, but not super desirable either. My stock Prism cooler was quite old and this new chip ran hot, so perhaps a mixture of these was causing my new high temps. I was rearching what the best CPU tower cooler would be and this cooler appeared a lot in discussions, and upon further deep diving managed to pick one up. I have been blown away (pun intended) by the performance of this cooler! My temps under the same load have went from 74c~ to never hitting 60c. To add, this thing is whisper quiet unless it hits max rpm but since the fans on this are both PWM controlled, I have it hitting 70%~ at best with my current fan curve (circa ~1000RPM) and I can barely hear these fans. I also picked up 2 new exhaust fans for my case, so while some of the cooling improvements I saw COULD be attributed to those, make no mistake; most if not all of the increased thermals I have seen are down to this monster of a cooler! Installation was a breeze (pun intended) and the TF7 paste included was also an upgrade over another brand I had used before. The fans on this model are TL-C12Cs which are high quality 120MM fans and product does come with a PWM splitter, something I do not believe is mentioned in the item description. When it comes to clearance with RAM sticks, I have one of the fans slightly pulled up to not make contact with the RAM modules and I still experience incredible cooling, so no need to worry about that affecting performance. For this price, this cooler is a bargain! Dropped my temps by 15c, and performs quieter to boot with the ability to set a curve for whisper quiet fans at idle temps. Highly recommended!!!
D**H
This cooler lives up to its reputation. For the price, it is one of the best performing air coolers available. I am running it on an AMD 9900X with heavy coding workloads, and even at over 90 percent CPU usage the temperature rarely hits north of80°C. In typical use it sits around 67°C. That is with the included Thermalright paste and standard fans. It is not silent, but it is very quiet. At one point I bent a fin while moving the fans, which caused a slight whistle, but bending it back fixed the issue. The fans themselves are excellent, though they do not have airflow direction arrows, so you need to figure that out when setting them up. For me the white sticker facing out worked, with one fan in the center of the tower and one on the outside. This is not a cooler designed to look good in a showpiece build. It is large, plain, and functional. But it comes with all the mounting hardware you could need, works with multiple platforms, and most importantly delivers top-notch cooling at an unbeatable price.
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