Wish there is an affordable ARM SOC board for building DIY Spark clusters, which has a 64bit CPU, 8 cores, gigabit ethernet, SATA, USB3, and 4GB memory (8GB memory would be even better), and under $100.<p>Spec-wise, Odroid xu4 [1] from Hardkernel is very close to meet this requirement, though still lacking in cpu and memory(only 32bit and 2GB memory for xu4).<p>[1] <a href="http:&#x2F;&#x2F;www.hardkernel.com&#x2F;main&#x2F;products&#x2F;prdt_info.php" rel="nofollow">http:&#x2F;&#x2F;www.hardkernel.com&#x2F;main&#x2F;products&#x2F;prdt_info.php</a>