Thermalright Peerless Assassin 120 SE CPU Cooler, 6 Heat Pipes with Dual Towers, Dual 120mm CPU Fans, 1550rpm±10%, No LED, for Intel LGA1700/1200/115x/1851; AM4/AM5
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Thursday, Aug 13
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Style: PA120 SE
Features
- [Brand Overview] Thermalright is a Taiwan brand with more than 20 years of development. It has a certain popularity in the domestic and foreign markets and has a pivotal influence in the player market. We have been focusing on the research and development of computer accessories. R & D product lines include: CPU air-cooled radiator, case fan, thermal silicone pad, thermal silicone grease, CPU fan controller, anti falling off mounting bracket, support mounting bracket and other commodities
- [Product specification] Peerless Assassin 120 SE; CPU Cooler dimensions: 125(L)x135(W)x155(H)mm (4.92x5.31x6.1 inch); heat sink material: aluminum, CPU cooler is equipped with metal fasteners of Intel & AMD platform to achieve better installation, double tower cooling is stronger
- Double PWM FansTL-C12C; Standard size PWM fan:120x120x25mm (4.72x4.72x0.98 inches); Product weight:0.97kg(2.1lb); fan speed (RPM):1550rpm10%; power port: 4pin; Voltage:12V; Air flow:66.17CFM(MAX); Noise Level25.6dB(A), leave room for memory-chip(RAM), so that installation of ice cooler cpu is unrestricted
- AGHP technique66mm heat pipes apply AGHP technique, Solve the Inverse gravity effect caused by vertical / horizontal orientation. 6 pure copper sintered heat pipes & PWM fan & Pure copper base&Full electroplating reflow welding process, When CPU cooler works, match with ultra-silent airflow fans, aim to extreme CPU cooling performance
- CompatibilityThe CPU cooler Socket supports: Intel: lga1150/1151/1156/1155/1200/1700/1851/ AMD:AM4 AM5; For different CPU socket platforms, corresponding mounting plate or fastener parts are provided
Description
Common heat pipes heavily depend on gravity to achieve optimal performance. Heatsink equipped with THERMALRIGHT Special design AGHP Heat Pipes is not affected by the mounting direction. This ensures user’s cooler experience in different computer case designs. Premium THERMALRIGHT TF-7 thermal paste is also included with CPU cooler for the best out-of-the-box performance. Redesigned Thermalright SS2 mounting system offers easy installation process and optimal mounting pressure. Based on TL-C12 fan design, TL-C12C fan series achieve optimal balance between performance and noise output, therefore they are all-around fan for heatsink or radiator use scenarios. The motor is equipped with S-FDB bearing for smooth operation and long life span.
Product Dimensions: 4.92"L x 5.31"W x 6.1"H
Brand: Thermalright
Power Connector Type: 4-Pin
Voltage: 12 Volts
Wattage: 4.8 watts
Cooling Method: Air
Compatible Devices: Desktop
Noise Level: 25.6 Decibels
Material: Aluminum
Maximum Rotational Speed: 1550 RPM
Power Connector Type: 4-Pin
Voltage: 12 Volts
Wattage: 4.8 watts
Cooling Method: Air
Compatible Devices: Desktop
Noise Level: 25.6 Decibels
Maximum Rotational Speed: 1550 RPM
Air Flow Capacity: 66.17 Cubic Feet Per Minute
Item Dimensions L x W x H: 4.92"L x 5.31"W x 6.1"H
Material Type: Aluminum
Brand Name: Thermalright
Manufacturer: Thermalright
Number of Items: 1
Model: PA120 SE-D1
Part Number: PA120 SE-D1
Item Weight: 971 Grams
Unit Count: 1.0 Count
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Aug 13
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View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Style: PA120 SE
This is an amazing cooler for the money. I had been using an old Cooler Master N520, but when I upgraded from a 1st-gen Intel i7 system to a 12th-gen i5, the mounting system was just different enough that I worried about my motherboard bending. So after shopping around and looking at lots of reviews, I chose this cooler. Pros: Cheaper and more efficient than the old Hyper 212 and N520 coolers. The mounting system is intuitive, strong, and easy to use. The cooler fits in even a mid-tower case from 2009. It dropped my temperatures by 30°F across the board, idle or running a load. I am at 78° idle, which is 8° over ambient. Under maximum load (OCCT) , the 12400F does not see temps over 117°. With the N520, I was running probably 15° warmer at idle, and at least 30° warmer under load. The Hyper 212 was about the same. It's very well packaged. It's extremely quiet. Even at maximum load the fans are only turning at 613rpm. Very very quiet cooler. Many tests put it on par with Noctua's much more expensive coolers. It's cheap. Does not have RGB. Thermal paste included. Cons: Very large. The second fan has to be mounted a little higher on the cooler in order to clear the RAM, but it does still fit and works fine. Comes with everything, but the included HUGE tube of thermal paste only has a tiny bit of paste in it. It's plenty to mount the cooler 2-3 times though, so my only complaint is that the size of the tube is a bit misleading. I'm glad they include good thermal paste. Check the pictures to see how much bigger it is compared to a Hyper 212.
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Reviewed in the United States on December 1, 2022 Reviewed in the United States on December 1, 2022 by Awesome
Style: PA120 SE
This cooler is an absolute marvel. Best temps I have ever seen. The fans that are included are awesome. I read several reddit threads that argued the SE version was "lower quality" and "more noisy" than the non-SE version because there were no dampeners (rubber feet at the corners) present on the fans and no fin stack covers. But this is only partly true. There ARE dampeners on the side of the fans that mounts to the fin stacks. And the lack of fin stack covers does not take away from the appealing look of this cooler in the slightest. After installing this magnificent beast, I could not get my temps to go above 62c. And I really tried. Plus, my case has mid airflow. I am now idling at 26-29c. Backstory. Built my PC in late 2015 with a 6700k, an R9 390x, and 16gb of 3000hz ddr4. First cooler was a Corsair H55 with the rad sandwiched between two Fractal fans in push/pull. Best stable 24/7 overclock I could achieve was 4.6ghz using 1.305v. The absolute max temps after long stress tests or hours long gaming sessions was 78-80c. Pretty toasty, but I could live with it. My idle temps were great, 28-32c. Having several apps open and a browser with a few tabs temps were always around 45-58. Fast forward all the way to 2022. Same cpu. Now my idle temps were up to 33-36c and my highs were routinely 79-83c. I realized that my cpu was getting a bit long in the tooth and I wanted to extend its life the best I could. By this time I had already upgraded my gpu to a Gaming X 6700XT and my RAM was now 32gb of Corsair 3800hz CL16. I shopped around and found a 240mm AIO that would fit my case, top-mounted. To my surprise, the 240 AIO only lowered my temps by an avg. of 3-5 degrees celcius. Certainly not $130 better than my nearly 7yr old H55. Disappointing. After only 1yr, the pump failed on the 240. I won't trash the manufacturer here. Being under warranty, I let [them] replace it with a brand new one. One year later, same thing happened, pump failed again. I will say this here, imo Corsair may be the only AIO worth spending your money on. I have also heard good things about the Lian li Galahad. The 240 I bought after the H55 was not made by Corsair and I regret it. Decided to give air cooling a shot. After extensive research, I had it down to the Thermalright Peerless Assassin 120 SE and the Scythe Mugen 5 rev. c - Black Edition. I actually ordered the Scythe but it got "lost" in transit and Amazon had to refund me. Immediately ordered the Thermalright and received it in under 48hrs. Taking off the 240 and installing this cooler took just 45min. I am floored by this cooler's performance. Ice cold temps and whisper quiet. I left HWInfo64 running in the background while I opened and ran benchmarks for Cyberpunk, CoD, and GTAV never checking the temps in between. I was shocked when I saw that the highest temp recorded was 60c. Ran AIDA64 for half an hour, highest temp recorded was 62c. If you are on the fence, buy this cooler. IMO, it is hands-down the best air cooler, and maybe the best cooler overall, available on the market. Thermalright ftw.
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Reviewed in the United States on August 15, 2024 by Dope Money
Style: PA120 SE
This cooler works well with a 5950x with some heavy cpu intensive video editing task. It's small and fits my Micro ATX case. This was my main concern, keeping decent temperatures with a cooler sufficient enough while fitting a micro case. This fits the bill and functions well. No complaints. Low noise and seems quality. Its was easy to install as well. So far it's been great.
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Reviewed in the United States on April 7, 2024 Reviewed in the United States on April 7, 2024 by Raini
Style: PA120 SE
Overall this has very good cooling. I bought this for a 5600x because I'm not comfortable with how high AMD was gleefully allowing these things to run (to the point that Prime95 _guarantees_ thermal cycling...) I upgraded from an old 2600 that ran cool as a cucumber even overclocked so it was a real shocker for me seeing my CPU exceeding 80C temperatures even with good airflow and in a worst case I saw it hit 90 (the thermal throttle limit on this chip and not as far below the absolute max as I'd like it to be) before I hard stopped that test and then clicked buy on this. Prime95 is not a realistic normal usage scenario (even encoding and such generally doesn't push quite as hard) but it does mean the stock cooler just wasn't going to cut it if I want this thing to last a long time (I do.) I never really looked hard at the stock cooler and just sort of mentally thought of them as large -- mostly because of that huge fan mount bracket -- but the actual heatsink of the original cooler is probably actually less than old CPUs used to use. Regardless, what truly concerned me was the thermal throttling even under normal usage. Even outside of Prime95, the temperatures jumped around like crazy. It could be 50C one moment, then 73C in less than a second for a bit and then right back to 50, again in less than a second... If you only care about maximum performance with full intent to throw the CPU out after one or two years this may be ok, but if you want it to last a long time this is wildly unacceptable (this is not a limitation that a CPU can fix by being more modern -- it's a limitation of the silicon dies themselves and really even applies to quite a lot of electronics and even mechanical machines. Extreme thermal throttling in the short term leads to a shorter long term lifetime.) The installation process for this thing is mostly painless. The mount brackets are a bit hard to get into place if you don't want to pull the board out because the bracket can slip a bit once you remove the original heatsink, but if I held the screws and plastic piece together while putting each in it wasn't too painful. I do think it's possible many people may accidentally turn them wrong so they curve outward instead of inward or even upside-down, so the installation process could have its issues there perhaps. The instructions don't really spell it out, but you can see which way to curve them by the pictures and if you're really thinking about it it's obvious the screws go upwards. Unfortunately, the fans are not so simple. I have no idea what they were thinking with those mounting brackets, but they're awful. They're extremely hard to get in -- especially since you have to attach the heatsink itself first (reaching the screws while the middle fan is in place would be extremely hard at best, but really just not something you want to try) so you're reaching around a giant heatsink with very little room around it inside the case to try to snap it into place. And it doesn't even really snap. It basically just sort of hooks in a bit on each side. I'm feeling extremely paranoid that a bracket could slip and one of the fans could come loose or even entirely fall out at some point in the future. I used to have a somewhat similar HSF that used little rubber pieces that fit tightly into the heatsink sleeves themselves on one end and snapped into the fan screw holes on the other and it lasted for years and years with no problems. They should have used those I think, though the middle one would have been hard to get in with those. Sadly the only ones I had would not fit on this because they were designed for different sized components so I had to use the provided brackets. (I recommend working the sides in between sleeves to slightly increase its overall grip.) It takes a fair bit of maneuvering to do this and I had one of the brackets decide to fall out while I was working on it (definitely make sure the system is unplugged while doing this or it could potentially cause a short.) It seems the best procedure is to put one side in first, slide the fan down, and put in the other, then recenter the fan. I'm also a tad concerned about their choice to have it mount to two screw holes instead of four. This gives it a lot more give to actually tilt a bit either way and it may even shake around if there is sufficient vibration. While it's unlikely there would be enough to be dangerous in normal operation, if you carry your case while traveling or, worse, ship it, I don't know that it would be good for the HSF at all. Also, there really is less room over the memory chip side than the description would imply. I had to have the fan sticking up just ever so slightly over the top of the HSF. My bigger concern is not the 0.5% reduction in airflow through the heatsink so much as the possibly more significant decrease in airflow over the RAM itself. However, I am not doing any real overclocking, so hopefully that will never matter. All that said, if you install this correctly and put aside annoyances like the mounts it does work quite well. It has definitely helped a lot to tame this 5600x. Temperatures are still not where I'd truly like them to be coming from my old 2600 and really just the CPUs I've had in the past in general, but it takes Prime95 to hit the maximum and that maximum after heavy load during the hardest parts of the test was quite a lot better and never hit the thermal throttling threshold. I was afraid to mess with settings too much or to do any significant testing with the stock HSF, but after some adjustments and final settings I have it currently maxing out at an absolute max of 76C, but it only hits that rarely and for a relatively short period of time even in Prime95. I'll have to do more game testing, but from the results so far I think I can get it to stay below 60C now during normal usage. (Mind you, the maximums still took some tweaking to reach this point as stock settings just boosted more and went a bit higher overall for longer.) Idle has dropped from mid 40s to mid 20s in Windows and from about 50 or so in this board's BIOS to about 35 or so now. I now can feel a lot more confident that my processor will actually last for many years instead of wearing out after the warranty. Also, thermal throttling is quite a lot better. It can still make some sudden jumps (Prime95 with small FFTs shot fans up to max and hit 77 almost instantly for example) but generally under normal usage the ups and downs aren't extreme. Someday I'd really love to see some sort of mechanism that cools CPUs more or less depending on actual usage to keep temperatures relatively consistent, but neither Intel nor AMD are particularly interested in doing this since the CPU market is heavily focused on performance now rather than a CPU still running a long time from now. (Of note, btw, the CPU maxes out at 115 watts of actual energy usage if Core Temp is to be believed in its calculations. I'm not sure what this works out to in real TDP, but I'm pretty sure it's more than the 65W this thing was supposed to be rated for.)
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Reviewed in the United States on June 1, 2022 by Joshua
Style: PA120 SE
I love the PA 120. I ended up replacing an AIO with this thing. The AIO was a couple years old and wasn't cooling like it did when new. Even applying fresh paste didn't help. There weren't a lot of PU 120's available when I bought (no choices of color and LEDs) but this one does a great job keeping the CPU cool. Peerless assassin is the best value out there and one of the best performers too. The only pain was the installation-- I think they might have changed the screws from prior versions where I was watching on YT-- but that meant it just took 5-10 extra minutes.
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Reviewed in the United States on June 9, 2025 by Purple Grimmus
Style: PA120 SE
These are such a great product and easy to install. I've used them in several builds and they perform great.
Reviewed in the United States on March 13, 2026 by jeremy garrison
Style: PA120 SE
Was a little fiddly to get installed, but once that's done it 's great. It is pretty quiet for the amount of air it seems to move. It just whirrrrs, does not scream, but there's definitely a good bit of air moving. I sounds like it starts up smoothly and throttles down nicely. I am not cranking the machine it's on hard, but my temps have been well within safe range when I do moderately intensive stuff and it revs up and runs at high speed for a while (2-5 minutes). Very happy with it. At the price I paid, EXTREMELY happy with it and will shop this brand in the future as a result of good results.
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Reviewed in the United States on August 18, 2024 by Seul
Style: PA120 SE
I kept my 12700 cool since last year when I bought the chip. It maxes at 70 degrees. Years ago, to keep classic monsters like 8700 , 3930 , 6700, and others, people would need overpriced coolers the size of classics like the D15, Deepcool, or an AIO. No longer do you need these big coolers; this is all you need
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Reviewed in the United States on January 1, 2026 by joe