HP · laptop motherboard

HP 640-G9 DAX8SFMB8B2

BIOS
Board code
DAX8SFMB8B2
Platform
Quanta X8SF
Made by
Quanta
Revisions
Rev B
Files
4
Updated

HP 640-G9 DAX8SFMB8B2 is a laptop motherboard designed by Quanta and used in the HP 640-G9, HP EliteBook 640 G9 and HP ProBook 440 G9.

The catalog has 4 BIOS files for it, posted between 2023 and 2025. Each download button opens the original Telegram post.

The files are marked Rev B; other revisions of the same board can differ in parts and layout.

BIOS notes: file names mention 32 MB chip sizes. Read and save the original chip contents before you write anything to it — Keeping the Windows Product Key (MSDM) When Reflashing a BIOS.

Also listed under platform Quanta X8SF; codes DAX8SFMB8B1.

Compatible models

Files for HP 640-G9 DAX8SFMB8B2

BIOS and firmware 4 All bios and firmware →

Notes from the source posts

  • You can give us as a gift.
  • HP EliteBook 640 G9 X8SF DAX8SFMB8B2 REV B
  • 32MB BIOIS & EC

Frequently asked questions

Which laptops use the DAX8SFMB8B2 motherboard?
File names in the catalog tie DAX8SFMB8B2 to the HP 640-G9, HP EliteBook 640 G9 and HP ProBook 440 G9. Laptops sold under one model name can use different boards, so confirm by the code printed on the motherboard.
Which revision of DAX8SFMB8B2 do I have?
Files for this board mention Rev B. The revision is printed on the PCB silkscreen, usually next to the board code. Pick files with the same revision when you can; if yours is not listed, the closest revision is usually fine for the schematic but check part positions in the boardview carefully.
What should I check before flashing the DAX8SFMB8B2 BIOS?
Read the original chip with a programmer and save two copies before writing anything. File names for this board mention 32 MB images; the dump size must match your chip. A dump from another board carries that board's serial number and MAC address, so restore yours from the backup.

Guides for this board

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Files are hosted on Telegram by third parties; ExcitingSpas.com only links to public posts. Check that a file matches your board before using it. Disclaimer · Report a file