Least CPU intensive for ESXi VM hosting - NFS or iSCSI?

[kelv1n]

Hi Guys

So I've curious, currently I have 2 ESXi hosts (homelab) connected to my TS-873 using NFS.. But after a huge investment in the box (and add-on), I want to use it for other things too.

For minimising resource usage such as CPU and RAM, what is best, iSCSI or NFS?

[storageman]

ISCSI pushes some workload onto host (particularly reads)
NFS is mostly the NAS doing the work.

So use ISCSI