He's simply letting us know what chip he's using to some degree because obviously an AMD64 might run hotter.
46C is good dude, don't know why you'd think that's hot. There's quite a few posts in here about peoples XP's hitting 55C's on idle muchless 46C at full load
change ur cpu heatsink !! the fans in ur case dont matter there blowing all over they have no access 2 the chip because ur heatsink is sitting on it!! get a betterheatsink