Bitmain Antminer S9 Noctua NF-A14 iPPC 140mm Fan Shroud/Adapter

thingiverse

Highly optimized adapters to run Noctua NF-A14 (or other 140mm) fans on an Antminer S9. Unlike other shrouds this design replaces the whole faceplates, allowing for much better airflow than bolting onto the original, restrictive 120mm plates. Also the physical interface to the Noctuas has been exactly matched for the smoothest possible air path, the adapter locks into and fills all the gaps on the fan perfectly. Still the print uses very little material, same or less than many shorter and smaller 140mm-to-120mm adapters. There are 3 variants with different fan interfaces: flat top for any 140mm fan, perfect fit for Noctua NF-A14 intake, perfect fit for Noctua NF-A14 exhaust. If you have a Noctua fan you should print one each of the latter, if you use another 140mm fan print 2x the generic version. Each of those are available with or without mounting points for rubber feet, for a total of 6 .stl files. Most efficient and extremely quiet operation at 500-1000W, can run up to 1300W with only 85°C (185°F) chip temp at 20°C (68°F) ambient temp. Other adapters usually max out at 1000W or less, showing the massively improved efficiency of this design. Not only do these fans run quieter during normal operation, but when rebooting or adjusting the power they also don't boost to 6000rpm, which is very obnoxious with the original fans even at otherwise quiet low-power settings. You either need to break off the plastic retainers from the fan sockets or shave of the middle rib on the fan's connector. Pinout is same as original fans, the plug ribs face outwards on the PCB. To connect the 60mm fan in the PSU you can use an adapter or (what I do) just lever off the original socket leaving the 2 bare pins exposed on the PCB, then connect the fan plug directly on the pins (red and black wires, yellow isn't connected). No supports are needed for the print. I use PETG, ABS will also work great, PLA might be too temperature-sensitive (DYOR). The base can warp, use appropriate settings or clamp the corners to the bed after the first 25 or so layers. Generic print options like 3-5 walls and top/bottom layers and 15%-30% infill are perfectly adequate. There are 4 additional holes for easier screwdriver access, but with the right screwdriver you can also tighten/loosen the screws without removing the fan from the adapter. If you want a modified version or have questions DM me. Necessary parts: 2x Noctua NF-A14 iPPC 3000 PWM 12V (the 2000 or non-iPPC versions will work, but restrict power) (https://noctua.at/en/nf-a14-industrialppc-3000-pwm) 1x Noctua NF-A6x25 FLX (or similar 60x25mm fan for the PSU, absolutely necessary for quiet operation, more important than the 140mm fans!) (https://noctua.at/en/products/fan/nf-a6x25-flx) 8x M4 Screws (ideally 30mm, up to ~60mm length) or zip ties Optional parts: 4x Rubber feet (ideally 14mm base diameter) and M3 screws (no longer than 5mm + rubber feet screw hole thickness, usually M3x6 will be perfect) (https://de.aliexpress.com/item/1005001402203907.html) 2x Fan grills 140mm (https://de.aliexpress.com/item/1005001708187477.html) 1x WiFi bridge Vonets VAP11N-300 or similar for easy operation wherever there's power and WiFi (http://www.vonets.com/ProductViews.asp?D_ID=23) You should definitely run Braiins OS+ or a similar firmware on your S9, a must if you want to use it as a heater with this fan mod! I strongly recommend enabling "immersion mode", unlike the official documentation suggests this doesn't disable fan control, but avoids errors that can otherwise occur with aftermarket fans.