This system Z620 has two (4) immediate errors.1.  Missing Hard Drive Caddy2.  512-Rear Chassis fan not detected3.  Missing NVIDIA QUADRO 6004.  UEFI boot fails to boot large drives (e.g., 4TB HDD). No way to update FW to do so, I tried.Systems was NOT TESTED prior to shippingThis is UNACCEPTABLE