thinking bout upgrading

[jetjaguar]

i was looking at just redoing my pc .. its been awhile ..

i was thinking of :

Abit AA8 duramax or 3rd eye .. (wut is the difference)?
1gig ddr2
3.4 LGA775
x800 xt pe

now for coolers .. for the cpu.. can i use the thermalright XP 120 ? or is the AA8 not a socket 478 .. ?? thanks