How NVMe servers deliver PCI to the drives?

altmind

Active Member
Sep 23, 2018
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How do the servers like this 7232P https://www.thinkmate.co/system/rax-qn24-12e2 with 24x NVME(each is 4x pci) and 1 CPU, connect the drives to the CPU? Do they use some kind of breakout boards for nvme? It it possible to assembly DIY >16 disk all-nvme storage right now and what cards may i need for that?

I see a lot of pci slots populated on the screenshot.