need help with AMD 2600 CPU with 8KHA+

[stefan]

Hi there:

I have an EPOX 8KHA+ and tried to upgrade my old AMD 1800 processor. After numerous processors I received an AMD 2600 with 266 FSB. However, it only recognizes it as 800MHZ and I have tried everything I could think of to make it work... at this point I would simply appreciate any hints or tips I can get. Here are the processor specifications:

AMD Athlon
AXMB2600FLQ4C
F444903240136
AQXCA 0309VPAW
1999 AMD


Thank you so much!!!