Circuit diagram for the Gigabyte GA-990XA-UD3 motherboard, revision 1.1, archived as RAR at 934 KB with a PDF inside. It helps when diagnosing a no-power or no-POST desktop board: you can trace the ATX power path, VRM controller and MOSFETs, RAM voltage, clock and reset signals and the SPI BIOS chip connections. Make sure the board is really a rev 1.1 by reading the marking on the PCB, since other revisions of this model exist. Extract it and open the PDF in a regular reader.
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 @schematicslaptop. Enginerys does not host this file.
All sources (3)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 15 Dec 2022 | Open file on RM Schematics |
| @cyberlanelectonik | 15 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 14 Aug 2026 | Open file on RM Schematics |
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.