Anyone have trouble with new atlons on A7V333s ???? like say 2600s?? I have the origanal processor which is 2100 works fine, tried 2 different 2600s and boots but wont go into windows. put 2100 back in works fine. got new 2600 wont go into windows. Tried both 2600s on different boards and they both worked fine. Memory is Corsair pc3000 and tried all mem timmings ect. 2.5 2 2 2 5, 2 2 2 2 5, (2.5 3 3 3 6 default) tried at 4 to 5 and 1 to 1 wich runs memory at 333 or 266 thing that bugs me is 2100 works but 2600 dont grrrrrr and both 2100 and 2600 work on different boards

Check your motherboard revision and your BIOS version, too. This page will tell you what CPUs your board will support:
http://www.asus.com.tw/support/cpusupport/cpusupport.aspx

Ive been using the bios they said worked wich is 1012 and everyother one up to 1016 still think its somewhere in timming cus 2100 works fine if it didnt boot at all with 2600 that would be diferent.

Is the 2600 a 266 mhz bus or a 333mhz bus?

Its a 266, the multiplier is factory at 16 and ever since bios 1015 it had support for 333 mhz but i wouldnt even try it at 2650 lol.