To enable full operating system support in megaSoC, a substantial amount of memory is required to accommodate the complexity of modern Linux-based software stacks, including the kernel, drivers, middleware, and user-space applications. Linux environments, unlike lightweight bare-metal systems such as nanoSoC, demand not only larger memory footprints but also consistent access to high-bandwidth memory to maintain performance across multitasking workloads. The most common approach is to incorporate external DRAM, which offers the necessary capacity and throughput.

Precision timekeeping is a foundational service in any distributed system. Whether synchronising Ethernet frames to a PTP grandmaster, timestamping die-to-die packet exchanges between chiplets, or scheduling time-critical hardware events, the system needs a clock that is accurate, capturable at multiple points simultaneously, and adjustable by both hardware servo loops and software without stopping.