Sapphire Radeon X1900 XTX PCI-E video BIOS for the 512MB version, provided in a ZIP archive around 83 KB. The code 6501550 likely reflects the default clocks of this ROM. It serves to restore a high-end X1900 card after BIOS corruption or a bad modification, flashed through ATIFlash or with an SPI EEPROM programmer. XTX and XT cards share hardware but differ in clocks, so be sure which variant you are repairing, and back up the current firmware before overwriting the chip.
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.
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 →