The Supermicro X7DWT motherboard is not listed on the flashrom supported hardware page, and the SST49LF016C chip has an "?" for erase and write status. I successfully reflashed the chip using flashrom, and thought I would send you a note so you can update the supported hardware list, if you would like.

This board(s) was in a Dell C6100 XS23-SB.

Thanks,

Steven Stremciuc