Here's the spec:
Max Airflow (m3/h)
Static Pressure (mmH2O)
To cover the small features first, the NF-A4x10 features anti-vibration pads! Granted they are incredibly small, on smaller fans that spin as fast as these you could argue they are even more necessary than on the larger fans. I don't personally like the size and perceived fragility of these pads, they look like they will just fall off with a slight knock. That being sad unless you intentionally rip them off, they will stay put happily, though take note that these are not designed to be removed so you will have to stick them back on if you do take them off.
You might also notice that even their 40mm fan is cable sleeved. Yes they really do care about the little details as you will see even more of further into the review.
Expressed in the picture to the right is a size comparison of the fan compared with the anti-vibration mounts supplied with it. To maximise static pressure it is also equipped with a 7 blade fan design, these take up a good part of the fan as the motor is quite small.
Keep in mind guys that to use this kit you will have to murder the fan your are replacing for its bespoke connector. Needing to murder another fan may be the Marmite to this adaptor however the capabilities it delivers make it worth a 2nd glance as it provides a 3 pin adaptor for ANY bespoke header. This blatantly obvious yet ingenious design makes this fan compatible with any header.
It comes with 2 accessories specifically for compatibility. The 1st one being the Omni-join adaptor set which is designed to create an an adaptor rather than being one itself. It is designed to be used on systems in which the fan you are replacing uses a bespoke connector and come with 2 sets of adaptors which I assume is for if you want to re-attach the connector at a later date.
The 2nd being a standard adaptor for 2 pin fan headers. This is here so you don't have to keep murdering your beloved equipment for a connection that is really quite common. Just like the rest of Noctua's accessories this adaptor comes wrapped in their extremely high quality cable sleeving, I just wish they would start using black connectors as well.
It is actually so quiet I feel that the 17.9 decibel rating is too high. Granted the fan doesn't push a ton of air even for a 40mm fan, but it does produce a static pressure rating of 1.78, an irrefutably high rating. This fan is perfect for any of your 40mm needs.
If you are looking for a fan that pushes the most air then this is not for you however unless you are deaf this wont be you. 40mm fans are loud and obnoxious, Noctua have found the middle ground here with their product. Meeting the requirements of most 40mm needs but keeping the fan silent at the same time, not to mention it has amazing static pressure performance.
If you are in the market for a small fan then this is Definitely going to be worth a 2nd glance,while being rather expensive the list of features and accessories that compliment this product make it worth every penny. It's only downfall in my eyes is that it was released at a very similar price point to the NF-A9x14, an utterly outstanding 92mm fan. I think they could have actually pushed it a little faster as well it's that quiet.
This fan receives our gold award, missing out just a tiny bit to the Platinum because we feel that a few slight tweaks could have been made to make this fan a product to truly behold.