12306-1 – Dell Precision LM440
The 12306-1 (Wistron) motherboard is found in the Dell Precision LM440 and Dell Precision M4400. The catalog lists 2 files for it: 2 BIOS files.
The earliest file dates from February 2024 (BIOS Archive).
BIOS dumps 2
Board facts
| Board number | 12306-1 |
|---|---|
| Designed by | Wistron |
| Platform group | 12XXX |
| Also known as | 48.4L409.01M |
| CPU generation | Intel 4th gen |
| First seen | 2024-02-06 |
| Source channels | BIOS Archive |
| About the number | Wistron board numbers look like 15217-1; the first two digits usually indicate the design year. |
Laptops that use 12306-1
- Dell Precision LM440
- Dell Precision M4400
What these files are for
A BIOS dump is a full image of the board's SPI flash chip. It is written back with an SPI programmer when the original firmware is corrupted, after a chip replacement, or to recover from a failed update. Read and save the original chip first: serial number, DMI data and the Intel ME / AMD PSP state differ between boards.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| .rar | RAR archive | 7-Zip or WinRAR |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Who designed the 12306-1 board?
12306-1 is a Wistron board number used by Dell.
Which laptops use the 12306-1 board?
Files in the catalog link 12306-1 to the Dell Precision LM440 and Dell Precision M4400.
Where do the download links go?
Each button opens the original public Telegram post the file was shared in. ChambersDesignInc.com only indexes and cross-references those posts.