MP 1,1-5,1 Which MacOS is best for my cMP 5,1?

[MarkC426]

where do you keep them? 4 SATA and where are the rest? I suppose you removed the CD-ROM ? And maybe NVME on adapters in the PCIe slots as well?

4 in the sata bays
2 on sonnet tempo pcie cards
1 in the lower (second) dvd bay (kept original dvd drive in the top)