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Noctua NH-L9a-AM4, Premium Low-Profile CPU Cooler for AMD AM4 (Brown)
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|Noise Level||15 dB|
About this item
- Make sure this fits by entering your model number.
- Only 37mm total height, ideal for slim HTPC cases and Small Form Factor (SFF) builds
- Compact footprint for 100% RAM and PCIe compatibility on ITX motherboards as well as easy access to near-socket connectors
- Quiet, premium-grade NF-A9x14 fan with Low-Noise Adaptor and automatic speed control via PWM
- Includes award-winning NT-H1 thermal compound and easy-to-install SecuFirm2 mounting system for the AM4 socket of AMD’s Ryzen CPUs and APUs
- Trusted Noctua quality backed up with 6-year manufacturer's warranty
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The NH-L9a-AM4 is the latest, AM4-specific revision of Noctua’s award-winning NH-L9a low-profile CPU cooler for AMD Ryzen-based HTPCs and Small Form Factor (SFF) systems. At a height of only 37mm, the NH-L9a is ideal for extremely slim cases and, due to its small footprint, it provides 100% RAM and PCIe compatibility as well as easy access to near-socket connectors even on tightly packed mini-ITX motherboards. The custom-designed SecuFirm2 mounting system for the AM4 socket makes installation child’s play and, thanks to the highly optimised NF-A9x14 92mm fan that supports fully automatic speed control via PWM, the NH-L9a-AM4 runs remarkably quietly. Topped off with Noctua’s renowned NT-H1 thermal compound, the NH-L9a-AM4 combines everything users have come to expect from Noctua’s larger coolers into a super-compact, premium-quality package for ITX and HTPC builds with Ryzen CPUs or APUs.
37mm low profile
Due to the slim 23mm heatsink and the NF-A9x14 low profile fan that measures only 14mm in thickness, the NH-L9 stands a mere 37mm tall, which makes it ideal for use in compact HTPCs or Small Form Factor cases that offer minimum clearance for CPU coolers.
100% RAM compatibility
The NH-L9a-AM4 has a compact footprint that fully complies with the socket keep-out zones specified by AMD. This means that neither the heatsink nor the fan overhang the RAM, so the cooler provides easy access to the slots and is fully compatible with tall memory modules.
100% compatibility with PCIe cards on mini-ITX
Some AMD-based mini-ITX motherboards have the PCIe slot located close to the CPU socket zone. While larger coolers that exceed this zone may block the PCIe slot, the compact-sized NH-L9a-AM4 provides full compatibility with PCIe cards.
NF-A9x14 PWM premium fan
The highly optimised, award-winning NF-A9x14 premium fan features Noctua's proprietary AAO frame as well as sophisticated aerodynamic design measures. Supporting PWM for fully automatic speed control, the NF-A9x14 allows the NH-L9a-AM4 to stay remarkably quiet.
- Height (without fan): 23 mm
- Width (without fan): 114 mm
- Depth (without fan): 92 mm
- Height (with fan): 37 mm
- Width (with fan): 95 mm
- Depth (with fan): 95 mm
- Weight (without fan): 345 g
- Weight (with fan): 420 g
Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating
Scope of delivery
- NF-A9x14 PWM premium fan
- Low-Noise Adaptor (L.N.A.)
- NT-H1 high-grade thermal compound
- SecuFirm2 AM4 mounting kit
- Screws for 92x92x25mm fans
- Noctua metal case-badge
Dedicated special edition for AM4 (Ryzen)
Please note that being a dedicated special edition for AM4, the NH-L9a-AM4 comes with AM4 mounting hardware only. (For full socket compatibility, see table below)
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|Sold By||Noctua Cooling Solutions||Noctua Cooling Solutions||AmaMax (USA) Since 1993 l iMBAPrice® Authorized Distributor||Noctua Cooling Solutions||Noctua Cooling Solutions||Noctua Cooling Solutions|
|Item Dimensions||3.62 x 4.49 x 1.46 inches||3.62 x 4.49 x 0.91 inches||3.74 x 1.46 x 3.74 inches||5.04 x 5.75 x 2.76 inches||3.74 x 2.00 x 3.74 inches||—|
|Item Weight||1.03 lbs||0.86 lbs||0.76 lbs||2.20 lbs||0.90 lbs||0.84 lbs|
Top reviews from the United States
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Under CPU stress test, the package temperature sites around 75C. I'd been lead to believe from other reviews that I should expect closer to 60C. But 75C sounds like it's cool enough to be fine. It runs 55-60C in typical gaming and 35-45C when browsing the web and watching video. Some day I will take the cooler off and check + redo my thermal compound layer to see if it can run cooler.
I wouldn't call it "nearly silent" but it is definitely quieter than stock. With it sitting just to my right on my desk I can't hear it unless the room is nearly silent. Any music, video game, talking, or the house's A/C running and the cooler is below the environmental noise most of the time. When gaming it's barely audible with normal game audio, which is a big improvement over the stock cooler which could drown out faint game sounds.
I'd personally prefer stealthy black rather than the distinctive Noctua color but shrug.
I was hoping for slightly better cooling than I'm seeing but it's a good compromise cooler.
Update: Been running it over a month now with no thermal issues at all. Never notice the fan noise at all. My MacBook Pro is a lot louder than this.
The NH-L9a ended up being worse thermally (but quieter) than the Wraith Stealth cooler included with the 2600, despite several heatsink remounts, and making sure the area around the fan is clear of wires.
I narrowed the cause to on this motherboard due to CPU socket orientation, half of the find are blocked by the ram, a set of G.Skill TridentZ in this build, so airflow suffered, and had to undervolt the 2600 considerably to keep it under 90c load temps.
After switching back to the Wraith cooler, the CPU dropped 10-15 degrees Celsius under load at stock settings, and while slightly louder I feel safer having it at those temperatures for extended periods.
Also, I really wish I could have been able to rotate the heatsink so the fins directed the hot air flow away from my ram.
I love Noctua products and will be upgrading to NH-L12S once I take some clearance measurements in my case.
Update 9/19 - for those curious about running the NH-L12S in a Node 202 it won’t fit... unless like me you just cut a hole in your case. Pros - great cooling and direct external air ventilation / Cons - not an easy DIY
In other words if you want a silent cooler for a HTPC this along with it's low noise adapter are perfect and should fit inside just about any HTPC case. It has plenty of clearance in my silverstone 6b mini-ITX case, installation was a breeze, nothing out of the ordinary.
I got this to replace my Scythe Big Shuriken 3 with a NF-A12x15 in my Ghost S1 (no tophat) for my 3700x build (on a B450I Gaming Plus AC) because of turbulence noise. The cooling for that combo was great, most games not even hitting 70c with the default fan curve.
Temperatures are what I initially expected, about 15-20c worse than the previous cooling solution I used before, so I wasn't disappointed when I saw temps of 75-80c in Destiny 2. I honestly could have left it like that since 80c isn't a horrible temperature for this cooler + a 3700x, or for CPUs in general.
Since I had some extra fans, I decided to put the NF-A12x15 (any fan would have worked really) over the stock 92mm fan since that fan doesn't cover the entire heatsink, and temps dropped to an average of 66c. There wasn't really any mounting points that I could use for the extra fan, but it's kind of just being held in place by the PSU cables. The extra fan is also following the same fan curve as the CPU fan.
-Old setup of Scythe Big Shuriken 3 + NF-A12x15 is 15-20c better than L9a
-L9a + NF-A12x15 on top of the 92mm fan = about 5-8c worse
Top reviews from other countries
Very weighty and well machined, it all seems very good quality.
I fitted this to a Ryzen 3 2200g on an AsRock AB350 Gaming ITX motherboard. It was a little awkward as you have to screw the heatsink on from the underside, while holding it in place and keeping aligned. It's very well mounted though.
Most temps seem similar to stock, but with much lower noise. I was always aware of the Wraith Stealth fan whereas in the same situations this is silent. When pushed the fan is louder but still acceptable, and quieter than the Stealth. With a GPU overclock to 1500MHz and gaming on GTA Online the fan seems to get to about 80% speed, so probably has a bit more potential.
I'm using this is a very compact case with restricted airflow so my temps are higher than average, hitting about 80C in games that push the 2200g.
As for the quality of the product, packaging etc, if you've never had a Noctua before......prepare to have your expectations exceeded by a company, a rare event for sure.
In summary, Noctua apart from your ugly brown fans.....you are still untouchable in the air cooled PC space, TOP STUFF
Packaging was excellent and the thermal paste of good quality - so much so that I disassembled an old laptop which was regularly thermal throttling and applied some new paste from the noctua and it now runs 20°c cooler.