I think the comparative results for z420_3 and z620_2 which ar nearly as possible the same system except for the motherboard, demonstrate something I've had in mind awhile. Xeon E5-1680 v2 4.3GHz) / z420 Liquid Cooling / 64GB DDR3-1866 ECC Reg / Quadro P2000 5GB / HP Z Turbo Drive M.2 256GB + Samsung 860 EVO 500GB + HGST 7K6000 4TB / Focusrite Scarlett 2i4 sound interface / 825W PSU /> Windows 7 Prof.’l 64-bit > 2X Dell Ultrasharp U2715H (2560 X 1440) Anyone rolling back should understand the risk and assume the best security measures possbile including a VPN and continuous high grade malware and virus monitoring. Reverting the BIOS version to restore performance therefore has an inherent risk. The 3.92 BIOS version is strongly recommended by HP to protect the system from Intel processor Meltdown / Spectre vulnerabilities. NOTE: This post indicates the method to roll back BIOS 3.92 in HP zX20 systems to an earlier version. Business PCs, Workstations and Point of Sale Systems.Printer Wireless, Networking & Internet.DesignJet, Large Format Printers & Digital Press.
Printing Errors or Lights & Stuck Print Jobs.Notebook Hardware and Upgrade Questions.
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