Firmware archive for the Dell OptiPlex 790 desktop in small form factor, with D28YY noted in the name, most likely a Dell board part reference. The 5.12 MB ZIP should contain a flash image for recovering the SPI chip on a unit that fails to post or shows a corrupted BIOS. Confirm the part number on the motherboard matches before use, since OptiPlex 790 came in several chassis sizes. Back up the existing chip with a programmer and verify the dump fits the flash capacity.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosarchive. Enginerys does not host this file.
All sources (6)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 1 Jul 2021 | Open file on RM Schematics |
| @BiosSchematicWorld | 9 Dec 2021 | Open file on RM Schematics |
| @pepeelectronica | 24 Apr 2022 | Open file on RM Schematics |
| @schematiclaptopramkushwaha | 13 Jul 2025 | Open file on RM Schematics |
| @schematics_bios | 25 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 1 Aug 2026 | Open file on RM Schematics |
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →