Okay I now reread your post and it's still slow after a fresh install.
Is your mobo BIOS all on default anr or auto settings?
Mobo's bios is generally in standard settings except I disabled things and features I don't use eg. floppy drive and etc.
My cousin has a very similar to mine build - similar model Mobo, slower CPU, slower ram, but different HDD, he's computer boots way faster than mine.
Generally, is it the HDD which makes booting slower?