

❄️ Cool, Compact & Quiet — The Ultimate Ryzen Sidekick
The Noctua NH-L9a-AM4 is a premium, ultra-low profile CPU cooler designed specifically for AMD AM4 sockets. With a mere 37mm height, it fits perfectly in slim HTPC and mini-ITX cases while maintaining full RAM and PCIe compatibility. Its advanced NF-A9x14 fan delivers 57.5 m³/h airflow at a whisper-quiet 23.6 dB noise level, controlled via PWM and a Low-Noise Adaptor. Installation is simplified by the SecuFirm2 mounting system and NT-H1 thermal paste, ensuring optimal thermal performance for Ryzen CPUs and APUs, including light overclocking scenarios. Noctua’s 6-year warranty guarantees reliability and peace of mind for professional-grade builds.































| ASIN | B075SG1T3X |
| Air Flow Capacity | 57.5 Cubic Meters Per Hour |
| Best Sellers Rank | #91 in Computer CPU Cooling Fans |
| Brand | Noctua |
| Color | Beige, Nickel |
| Compatible Devices | Desktop |
| Cooling Method | Air |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,804) |
| Date First Available | September 20, 2017 |
| Global Trade Identification Number | 09010018000092 |
| Is Discontinued By Manufacturer | No |
| Item Dimensions LxWxH | 4.49 x 3.62 x 1.46 inches |
| Item Weight | 1.03 pounds |
| Item model number | NH-L9a-AM4 |
| Manufacturer | Noctua |
| Material | Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating |
| Maximum Rotational Speed | 2500 RPM |
| Noise Level | 23.6 Decibels |
| Number of Items | 1 |
| Power Connector Type | 4-Pin |
| Product Dimensions | 1.46"L x 3.62"W x 4.49"H |
| Series | NH-L9a-AM4 |
| UPC | 841501100093 |
| Voltage | 12 Volts |
M**E
Perfect for an APU build. But hear me out. I have some details that may help you.
Will it fit? This is obviously a very low profile cooler. But please do check out the dimensions. It fit even on my mini-ITX motherboard (that's TINY), but do have some oversight with how things are spaced on your motherboard. The heatsink is short, but fairly spread out. Temperature talk/overclocking: Firstly, let me address something at least I was concerned with while I was researching this. YES, you can lightly overclock your APU while using this, just test stuff out until you find something that works. And please do be careful, your computer is a sacred baby, go easy on it. Anyway, for example, I overclocked my Ryzen 3200g CPU to 4000mhz, and my GPU to 1500mhz. At least in games I play (GMOD at 1080p full settings, Payday 2 1080p medium), I get 60fps while also staying around 55 degrees Celcius. That's about 30 degrees BELOW what would be considered ALMOST dangerous for an APU. But what about idle/light workloads for non-gamers? Idle Noise and the noise adapter: The fan is much more quiet than any stock AMD cooler, and although it can be made even more quiet with the noise adapter, that's because the adapter slows the fan down. In essence, the adapter WILL affect cooling performance, but most often that's not even necessary. The fan is very quiet and cool on idle or with light workspace stuff. Installation: Installation is easily the only "flaw" this cooler had in my case (even then I still gave it five stars). To install it, I recommend taking the fan off the heatsink, place the heatsink upside down atop a well balanced, sturdy cylindrical object. Apply thermal paste to your CPU (or APU ; ) ), then with your motherboard upside down, line up the heatsink holes with the holes on your motherboard. Keep your motherboard pressed down and balanced on the heatsink. Then take that metal plate included and put the PLASTIC side on your motherboard's bottom. Keep it balanced, and lightly screw it in the with "cross" method. Once the heatsink is secure, flip your motherboard. Not which direction the fan blows the air. You can screw the fan back into the heatsink so that it will blow the majority of air where you want it to. Now, clearly, that's much more complicated, and arguably more risky than a standard installation. But with patience, top-of-the-line thermal paste, and some luck, it will be so worth it. Appearance: People say Noctua fans are ugly, but there's a charming, almost nostalgic look to the fan. It will hardly match any color scheme at all (for instance, mine is red and black, and this fan looks like the nerdy kid at a party), but there's an eccentric, signature feel to that. Extras: You get some extra fan screws and a cool little metal Noctua pin. This looks quite nice and adds character to a PC case. Mine is proudly located above my Ryzen 3 and Vega Graphics stickers.
S**2
Works amazing for its size
This well built tiny cooler does an amazing job at keeping my Ryzen 5 4600G at an awesome 40 C at idle. Just at silent mode it is great, at Normal mode which turns the fan speed up, cools it down to 37.5 C at idle. I can see the fan spin, but it is dead silent. This is in a mini ITX case with not too much room to spare. Wonderful product. I highly recommend it. Oh, and did I mention that this is SO EASY TO INSTALL? Backplate and 4 screws after applying thermal paste and then snug it up with a screwdriver for even pressure. A walk in the park.
B**B
perfect mini-itx build fan
wow the build quality of this was really tops. pulls down tight and level. Very very quiet. and of course its the lowest you will find. perfect for mini-itx builds
T**T
Great little fan that fits in the most compact scenarios
If you’re looking to build in a super compact case, this fan won’t disappoint! In fact, it’s in a class of its own size wise and may be your only option if you have extremely low head room. It’s whisper quiet once setup and provides adequate, although not trend setting cooling. My daughter was excited to build her first PC with me and wanted to go for a Mac Mini look because they have those at school, and she thinks they look cool. This unit was easy to install, although, having to flip the motherboard over and go in with the screws from the opposite side from what I’m accustomed to threw me a little bit of a curve ball. Once setup, temps were in the 40s and lower 50s, which isn’t great, but it’s within the range of acceptable. Setting the performance to power saver mode brought temps down to upper 30s and 40s which is a good range to be in if you’re looking to extend the life of your CPU and keep electrostatic levels down. ***Pros*** • Extremely small and compact • Whisper quiet • Unbeatable life-span estimated arrival 150,000 hours ***Cons*** • A tad pricey for what it is, but there’s really nothing to compare it with at the moment • Only provides adequate cooling under normal operation. I wouldn’t dream of overclocking with this
S**L
Great Build Quality and Packaging. Solid Results.
Installed this on a Ryzen 2600 to replace the loud stock wraith stealth cooler. This cooler's fan is LOADS quieter under all circumstances. Installation was very straight forward, it comes with Noctua brand thermal paste and longer screws for a thicker fan if you ever wanted to upgrade down the road. I only bought it for improvements in noise levels as the stock Ryzen cooler was annoying. But this does allow me to overclock slightly with peace of mind. I have clock levels of 4.0 GHz @ 1.30625V and temps are good, about 62C on a stress test. I have an NZXT H500 which doesn't have the best airflow, so I'm good with the results of this cooler. Even on a stress test the cooler remains very quiet, you can hear it but it's mostly air noise. Packaging is fantastic. The actual cooler is well built and solid. Would recommend.
A**I
You get what you paid for. Price is much cheaper on Amazon compared to other sources
T**S
Ich habe den Noctua L9a mittlerweile schon dreimal für verschiedene Systeme gekauft und bin jedes Mal aufs Neue überzeugt. Als jemand, der früher bei einem Mitbewerber im Bereich Kühltechnik gearbeitet hat, kann ich sagen: Noctua setzt seit jeher den Standard. Die Qualität und die Leistung dieses Kühlers sind einfach herausragend. Der L9a ist besonders für kompakte Builds oder HTPCs ideal. Trotz seiner geringen Größe liefert er eine sehr gute Kühlleistung und ist dabei unglaublich leise. Der Einbau gestaltet sich dank der klaren Anleitung und der durchdachten Konstruktion problemlos – auch in engen Gehäusen. Was mich besonders beeindruckt, ist die leise Laufweise. Selbst bei längeren Belastungen bleibt der Kühler nahezu unhörbar. Als jemand, der viele Kühler verschiedener Hersteller getestet und eigene mitentwickelt hat, kann ich sagen, dass Noctua immer der Maßstab für hochwertige und zuverlässige Kühlungstechnologie war und auch heute noch ist. Fazit: Der Noctua L9a ist ein exzellenter Kühler, der in jeder Hinsicht überzeugt. Ich werde ihn auch in Zukunft wieder wählen und kann ihn jedem empfehlen, der auf Qualität, Leistung und geringe Lautstärke setzt!
E**.
Exceeded my expectations for the low profile AM4 CPU heatsink, Noctua's customers service is second to none! I first bought the L9a heatsink and had Noctua sent me the AM4 kit free of charge because the at the time the L9a-AM4 wasn't not available yet, the AM4 kit for the L9a arrived at my door in a week but unfortunately I could not remove the bottom plate screws that held the older bracket in place in order to replace it with AM4 one without circling the screws (they were on too tight which is a good sign of build quality but a nightmare to remove in my case). I contacted Amazon and returned the L9a without hassle just as the L9a-AM4 was available on Amazon sold by Noctua and I ordered the L9a-AM4 as the replacement, the heatsink arrived very fast through Amazon's shipping service and I this time around had not trouble mounting the heatsink (which included Noctua excellent NT-H1 thermal compound) on my Ryzen CPU. I needed a low profile cooler which does not exceed 57mm in height and this heatsink did and exceeded the job being both efficient at cooling all the while being quiet on noise, currently I'm able to get a 3.9Ghz overclock on my Ryzen CPU with max temperatures of 70 degrees Celsius under full load and 60 - 65 degrees Celsius when gaming which is quite feat on it's own considering the size of the heatsink and the size of my mini ITX case (which is a Cooler Master Elite 110). All in all a great buy considering Noctua's great customer service, the cooling performance, form factor and noise this heatsink offers for AM4 adopters who need a low profile heatsink...no need to look elsewhere this heatsink is one of the very best.
A**O
Lo compré para un servidor que monté y funciona perfecto, no hace prácticamente nada de ruido y se nota la diferencia cuando pasas de usar un ventilador cualquiera a un Noctua. El perfil bajo vino muy bien para un servidor de 2U que monté pero posiblemente funcione también en un servidor 1U sin el ventilador encima (usando ventilación a lo largo del servidor).
H**R
Très bon ventilateur, ne fais aucun bruit, prend peu de place !
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