The 8INXP is the better board, even tho is is rated less memory bandwidth it delivers more.
It is the better overclocker and better performance.
The SINXP works fine but it will not break the DDR400 spec b much so I am forced to run DDR400 2-6-2-2 max. This motherboard does not deliver the advertised bandwidth, on paper it looks great.
I have both boards, and I cannot break 3.9Ghz on the SINXP yet the 8INXP will break 4.1Ghz with the same CPU.
<b>"Granted I dont own a P4. But I read enough stuff and waste enough time on forums newsgroups IRC and computer news sites that I proberly know more then if I DID own a P4." -vk2amv</b>