iXsystems sells turnkey TrueNAS boxes with Atom CPUs, which are comparable in terms of TDP, clock speed, core count, etc. Though the Atom CPUs support 16x more

iXsystems sells turnkey TrueNAS boxes with Atom CPUs, which are comparable in terms of TDP, clock speed, core count, etc. Though the Atom CPUs support 16x more RAM, which ZFS will definitely take advantage of, and 50% more PCIe lanes. So they're not exactly apples-to-apples, but I don't think encrypted datasets would be the bottleneck.