He drilled four mounting holes into the aluminum block, and added a ceramic pad for cooling the processor at first, but eventually switched to copper pads coupled with screws and spring to kept the processor, pad and aluminum block in good contact without too much force applied. But there’s something funny about the heatsink, it does not look like the heatsink provided by FriendlyElec at all… Willy wanted to save some horizontal space, so instead he made his own heatsinks out of an L-shaped aluminum block that 5.2cm wide and comes with a 2mm thick aluminum corner. Hardware Build and DIY HeatsinkĪs you can see from the photo above, the setup comes with five NanoPi NEO4 boards connected to ClearFog Pro board over a Gigabit Ethernet connection. Willy goes through the hardware setup, and software into much details in a blog post, so I’ll try to give a summary highlighting the key points in this article. He’s now decided to build another similar build farm but with NanoPi NEO4 boards instead. Up to now he had a build farm powered by five MIQI boards featuring Rockchip RK3288 processor with four Cortex-A17 “fast” 32-bit processor, and controlled with a ClearFog Pro networking board. FriendlyElec NanoPi NEO4 is currently the cheapest and smallest SBC powered by Rockchip RK3399 hexa-core processor which packs two Cortex A72 “fast” 64-bit cores, and four Cortex-A53 “efficiency” cores, so it should be an obvious candidate if you plan on building an Arm build farm costs to its low cost, small form factor, and relatively good performance.Īs part of his work on HAProxy load balancer, Willy Tarreau often has to run time-consuming builds for Arm targets, and to speed up the builds he’s put together several Arm based build farms powered by low cost development boards / SBCs.
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