March 15, 2026
Description
I designed this chassis for my Bitaxe Gamma 602 to help cool the voltage regulator using a second Noctua fan. It should also fit the 601, but I havent tested it yet.
Fan used:  NF-A6x25 5V PWM.  https://www.noctua.at/en/products/nf-a6x25-5v-pwmx
The fan comes with a Y-adapter you can use for powering two fans from one connector.
I also use an external 5V power supply from Mean Well and use a small Raspberry Pi heatsink on the voltage regulator
Once installed, I used the Bitaxe Hashrate Benchmark from mrv777: https://github.com/mrv777/Bitaxe-Hashrate-Benchmark to see how far I can push the hashrate (there are also other bechmark scripts). Please take the warnings on his site seriously! Overclocking your Bitaxe may destroy it! Also take note, that the stock power supply AND barrel connector to the Bitaxe are already close to their maximum operational limits! By drawing more power, you risk overloading both! Stay within these operational limits!
Printing orientation as shown in the pictures.Â
I printed the chassis using a 10mm skirt, which I highly recommend. No additional supports are needed. PETG recommended, but I also have used PLA without any issues yet.
For the cowel, no supports are needed when printed in the orientation as shown.
Place the Bitaxe PCB into the VR Jet chassis and secure using the four 2.5 mm corner screws (I used the ones it came with).
Place the fan onto the chassis and secure using at least two 3x10 mm (or longer) screws in the corners.
Optional: Place the Cowel onto the fan by first engaging the side marked as "1". Then slowly press down on the opposite side marked with "2". Be careful! The tabs may break off if too much force is used.
Thats about it.. enjoy!
Update: The fan shroud (the white piece) which attaches to the front heat sink is not my design, but I found it here:
Its a pretty cool solution and also adds to the performance.
License:
Creative Commons — Attribution — Noncommercial — NoDerivatives
SJB4127
