Question Insufficient memory to “Shadow PCI Expansion ROM" caused some cards cannot detect/work problem during POST or under OS on certain system configurations, and/or during invoking certain PCI Expansion ROM configuration utilities. This limitation is not a server board specific issue, but BIOS limitation which presents on all BIOS based platform (PCI specification). At this moment there is no way to fix to all add-on cards available in the market, but there are some workaround suggestions. Answer I.A Firmware updates may reduce ROM size requirements. Please check you’re your add-on cards venders for more detailed information and Ensure all system and adapter firmware are at latest levels. II.Disable the Preboot Execution Environment (PXE) ROM of on-board NICs (Via BIOS configuration). III.Disable all unnecessary option ROMs for any non-booting devices (Via BIOS configuration). IV.Change the ROM order via BIOS configuration or changing slot location, because some cards need more ROM space and should initialize first to reduce chance of problem occurring. V.PCI-e adapters with PCI firmware spec 2.1 should be in earlier slots. PCI-e adapter with PCI firmware spec 3.x does not need as much Option ROM space due to design changes (Check with add-on cards venders). VI.Add-on card slot order suggestion: Option A: 1 & 3 & 5 & 7 & 9 Option B: 2 & 4 & 6 & 8 & 10 Was this FAQ helpful? YES      NO Enter Comments Below: Note: Your comments/feedback should be limited to this FAQ only. For technical support, please send an email to support@supermicro.com.  Enter your email address below if you'd like technical support staff to reply:  Please type the Captcha (no space) 8 F 4 U FAQ Stats FAQ ID Related Category / Keyword Date Posted Code 15657 BIOS: - BIOS Setting 02/20/13     Print Answer