Ecco l'ultimo bios
http://www.dfi.com.tw/Upload/BIOS/AK75EC0829.ZIP

e la descrizione
Support AMD Athlon XP 2600+ CPU for DE0 & EH0. (A+ does not support Thoroughbred with 0.13 technology. Please refer to CPU support list)

e qui il manuale
http://www.dfi.com.tw/Upload/Manual/47800106.PDF