Gigabyte GA-990FXA-UD3 schematic diagram for board revision R402, delivered as a PDF compressed in an 814 KB RAR file. The later 4.x revisions of this AMD 990FX platform board changed parts of the design, so the PCB revision must match R402 before you rely on reference designators or rail names. The drawing helps with tracing CPU core and memory supplies, power-good chains and Super I/O signals, and with locating which component pulls a rail to ground. Unpack it first, then view it with a standard PDF 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 (4)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 18 Mar 2024 | Open file on RM Schematics |
| @generalbios | 15 Dec 2024 | 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.