Bios Inaccurate

The pc that I have came with a Cyrix M11-350GP processor. I removed it and installed an AMD K6-2/400 processer. I ran the SiSoft Sandra diagnostic software and it told me that my SMBIOS/DMI was inaccurate. What should I do. I have been told to flashmy bios, but I don’t know what the bios file name is.