i have a simple theory when it comes to compare 32 bits and 64 bits methods
lets just say the GHz is the speed of cars, and 32 bit is a Highway with 2 tracks, and 64 bit is a highway with 8 tracks, so they the same when it comes to the speed, but 64 bit can travel more cars (data 😛) then the 32 bit (2 tracks)
ps, SSE3 could be a Ferrari 😛, loool