It doesn't help that nics usually are not available in narrow pcie cards. PCIe 5 x1 is 32 Gbps (afaik) so it should be able to handle 25GbE, but good luck findi

It doesn't help that nics usually are not available in narrow pcie cards. PCIe 5 x1 is 32 Gbps (afaik) so it should be able to handle 25GbE, but good luck finding such nic. Either you get some 400GbE pcie5 monster or some ancient pcie3 25gbe card