you have bought an Athlon with a 333MHz FSB when your mobo only supports Athlons with a 266MHz FSB. The Athlon 2600+ with a 266FSB is and always has been rare as hens teeth and its setting would have been 133x15.5.
Nokia 6 (2018) review
iPad 9.7in (2018) review
Comment retrouver son code Wifi ?