Template:mpu The Xeon D-1559 is a 64-bit octa-core x86-64 microserver SoC that was introduced by Intel in April of 2016. The D-1559 operates at 1.5 GHz with a turbo frequency of 2.1 GHz. This chip, which is based on the Broadwell microarchitecture and manufactured in 14 nm process, has a TDP of 45 W and can support up to 128 GB of RAM (DDR3L/DDR4).