I7 2.8 VS. i7 2.66

Solution
the i7 860 has higher turbo boost and is a little bit faster, but if u want a futureproof system the x58 platform (i7 920) offers more advantages than the p55 platform (i7 860)
the i7 920 (bloomfield) has tri channel memory support, the socket based 1366 supports 16x sli/crossfire.

thr i7 860 (lynnfield) has dual channel support, sli only in 8x modes, has less memory bandwith

this is what i know
 
the i7 860 has higher turbo boost and is a little bit faster, but if u want a futureproof system the x58 platform (i7 920) offers more advantages than the p55 platform (i7 860)
 
Solution