Try to run AMD/ATI Pixel Clock Patcher, you can download from HERE
That card might have a modded bios, let us know if thats helped with error 43I guess it doesn't have a modded bios:
Does it?
Run pixel clock patcher may help. I received error code 43 everytime I mod my card. Run pixel clock patcher then restart your rig and it'll work
Do you mean to run atikmdag patcher 1.4.6?
Should I run it to my graphics cards?
Please look at the link picture above.