Then you can try to flash the card using bios from techpowerup database. Open it with bios editor and check the values. If the size is 256kb open it with atiwinflash then save.
Hi Red when i open bios of techpowerup database(256kb) i reiceve this message :
https://image.ibb.co/hYBiQk/bios256.pngwhat can i do?
Load it in atiwinflash then save and check if the size is changed to 512. Better don't flash with this 256kb only.