AMI BIOS Beep Codes

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Most Thomas-Krenn Servers are equipped with Supermicro or ASUS motherboards with BIOS or UEFI Firmware from AMI. In case of initialization errors during startup, the so-called Beep Codes can help to analyze the underlying issue. In this article you will find information about the meaning of the beep codes of AMIBIOS 8 and for UEFI-based firmware Aptio 4 and Aptio V.


Aptio 4

Examples of Aptio 4 Beep Codes

Beep Code Meaning Supermicro FAQ / Manual
1x Refresh; Circuits have been reset. (Ready to power up) [2]
4x short Wrong memory installed (eg. Registered when unbuffered required, or Non-ECC when ECC required) FAQ 16762, FAQ 17658
4x CPU not supported; update BIOS to support new CPU FAQ 14299, FAQ 14998
5x No Console Input or Output Devices are found FAQ 18188, FAQ 19531
5x short + 1x long Memory error; No memory detected in the system [2]
8x Display memory read/write error; Video adapter missing or with faulty memory [2]

Aptio V


  1. FAQ 19896 ( X9 platform uses Aptio 4.0 code base.
  2. 2.0 2.1 2.2 Supermicro X9SCM-F User's Manual ( - Appendix A BIOS Error Beep Codes

Additional Information

Foto Werner Fischer.jpg

Author: Werner Fischer

Werner Fischer, working in the Web Operations & Knowledge Transfer team at Thomas-Krenn, completed his studies of Computer and Media Security at FH Hagenberg in Austria. He is a regular speaker at many conferences like LinuxTag, OSMC, OSDC, LinuxCon, and author for various IT magazines. In his spare time he enjoys playing the piano and training for a good result at the annual Linz marathon relay.

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