Depending on the configuration, the CPU and the main memory comprise about a third of the cost of the system each, and these days, memory is usually more expensive than the CPU. And so the relative slice sizes in the server cost pie for generic servers widened and shrank here and there. Over time, flash memory was added to systems, main memory costs for servers spiked through the roof (but have some down some relative to the price of other components), and competition returned to X86 CPUs with the re-entry of AMD. The power supply, network interfaces, and chassis made up the rest, and in a lot of cases the network interface was on the motherboard already, so that cost was bundled in already except in cases where companies wanted a faster Ethernet or InfiniBand interface. Memory was about 15 percent of the system cost, the motherboard was about 10 percent, and local storage (which was a disk drive) was somewhere between 5 percent and 10 percent, depending on how fat or fast you wanted that disk.
If you do the math on what things costs over time, about a decade ago the CPU used to comprise about half of the basic server cost in the datacenter for infrastructure workloads HPC systems were a little more intense on cores and a little less intense on memory. So let’s ask this question another way: What is the most expensive component in the more generic, non-accelerated servers that comprise the majority of their server fleets? Main memory, correct again. What is the most expensive component that hyperscalers and cloud builders put into their X86 servers? It is the GPU accelerator, correct.
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