Dell OptiPlex 5055 Tower Owner's Manual page 5

DDR4................................................................................................................................................................................. 55
DDR4 Details.............................................................................................................................................................. 55
Memory Errors........................................................................................................................................................... 56
Active State Power Management..................................................................................................................................56
5 System setup...............................................................................................................................................57
Boot menu.........................................................................................................................................................................57
System Setup options..................................................................................................................................................... 57
Updating the BIOS in Windows .....................................................................................................................................63
Updating BIOS on systems with BitLocker enabled.............................................................................................. 64
Updating your system BIOS using a USB flash drive............................................................................................ 64
Updating the Dell BIOS in Linux and Ubuntu environments....................................................................................... 64
Flashing the BIOS from the F12 One-Time boot menu............................................................................................... 65
Technical Specifications.................................................................................................................................................. 68
Processor.................................................................................................................................................................... 69
Memory.......................................................................................................................................................................69
Video............................................................................................................................................................................69
Audio............................................................................................................................................................................70
Network.......................................................................................................................................................................70
Expansion bus ............................................................................................................................................................70
Wireless....................................................................................................................................................................... 70
Drives............................................................................................................................................................................71
External connectors....................................................................................................................................................71
Controls and lights .................................................................................................................................................... 72
Power...........................................................................................................................................................................72
Physical dimension..................................................................................................................................................... 73
Environmental............................................................................................................................................................. 73
8 Troubleshooting........................................................................................................................................... 74
Diagnostic and Power LED codes.................................................................................................................................. 74
Enhanced Pre-Boot System Assessment - ePSA diagnostics................................................................................ 78
7 Getting help................................................................................................................................................. 79
Contacting Dell................................................................................................................................................................. 79
8 Troubleshooting........................................................................................................................................... 80
Contents 5