NoctuaNA-IS1-12 chromax.Black Sx2, Inlet Side Spacers for 120mm Fans (Black)

Love Noctua stuff. I have all Noctua fans in my build, and though why not and try these. I have the spacers put on my bottom intake feeding my GPU. and I have another 3 on my the pull side of push/pull AIO set-up (THEY ARE ONLY MEANT TO BE USED IN A PULL COFIGURATION WITH SOME SORT OF IMPEDENCE IN FRONT OF THE FAN!). The sound and airflow differences are quite noticeable. The sound has turned into more a silent hum with the resonating less noticeable. The airflow from the bottom fans......all I can say is that I was kind of shocked how such small spacer can increase airflow so noticeably. Definitely a worthy investment if you're an enthusiast 🤓

I was using a 120mm Noctua industrial fan on a hexagonal exhaust grill. Before using the spacer, it caused an insane high-pitched whine, sounding like it was a 10k rpm fan rather than 3k lol. With the spacer, the extra noise was cured. This product is kind of expensive but it's worth the price when you are using high-speed, noisy fans.

I have an S12A Chromax fan that is mounted in the rear of the computer, however when mounted as exhaust, under load, I was not feeling any hot air, because the top mounted radiator with F12 IPPC 2000s pushing air to the top was basically the exhaust of the computer. So, I flipped the S12A to intake, and that lowered my CPU temps a few degrees. However, with the Low Noise Adapter, I could only push the S12A fan to 80% (~860 RPM) until I could start to hear it. Noctua later released these inlet spacers, so I figured I might as well give it a shot. I used one of those inlet spacers on the S12A, and that actually let me push the fan to 100% (~940 RPM) and I still cannot hear it. Both of my computers have their fans tuned for silence. I could probably go even higher than 100%, but I chose to keep the LNA in for cable management reasons. I also used the provided anti vibration mounts when mounting the fan with the inlet spacer, but if for some reason you just want to use long fan screws, those are included as well. I got this when it was priced at 10$, but even at 15$ (price at time of writing this review) I think this is a great product if you have any Noctuas pulling air through a grille!Only slight con is, it *may* be a bit tricky to install the spacers with the anti vibration mounts depending on how crammed your setup is, but it is doable for the most part.

I replaced the fans of my Corsair H100i RGB Platinum with Noctua A12 fans. The difference was quieter, but I stumbled onto these spacers. These are marketed as helpful for AIO fans, so I bought a set. Turns out, Notcua fans can indeed get quieter--and the AIO performs better too!For reference, I can turn these fans up to 75% RPM and not mind the noise. The old ML120 fans were so damn noisy at any speed above 50%. Cooling efficiency is a lot better as well. Highly recommend Noctua fans and these spaces if you don't mind ugly fans. I did get the redux ones though, which are dark gray/black and look nicer than the usual Noctua brown.

It is a good accessory to use with Noctua NF-A12x25 that are mounted flush to a heatsink or grill. It is a bit expensive for its purpose and does not fit with other fans besides Noctua.

Does what it says on the tin, but are a bit overpriced for what they are.

Works well for quieter NF-F12 against panel and dust filter. More effective cooling I suspect too given temperatures.

This is designed to be placed where the air is exiting, most beneficial with your AIO. I feel like it's doing a great job and my i9-13900k and I are extremely happy(and not worrying about it overheating!). Would highly recommend.