i posted this over in the mobo forums but i guess there is more traffic thought the cpu forums and it is kinda cpu related.. i have 2 opteron 2216s i bought off ebay for $80 and bought a tyan s2912 mobo off newegg.. i got all the components and put the system together but it wont post.. after more research i found out that the opteron 2000 series chips have a maxium memory speed of 667mhz. and the memory i bought was kingston reg ecc memory that is 800mhz i was wondering if the memory is the reason that it wouldn't post. i went ahead and bought some reg ecc 667mhz memory fron newegg but i am amazed at the fact that it would simply down clock the ram from 800 to 667.. does anyone have any thoughs on this???