Version history Upgrade and Maintenance Manual RX2530 M4 Issue number Reason for update 1.0 / May 2017 Initial release 2.0 / July 2017 New hardware: air duct, additional backplanes, TPM, BU100, cable plan moved to appendix B 3.0 / January 2018 BU100 named in Dual microSD 64GB Enterprise, variant 2 of DC PSU added 4.0 / September 2018 Chapter Liquid Cooling added, configuration with up to two PCIe SSD modules added, PDUAL AP200 added, chapter main memory updated, new cable plans 5.0 / September 2019 New text Chassis ID Prom Tool, example EP4x0i added, installing/removing/replacing of PCIe SSD modules added, text M.2 SSD updated, note for memory modules added