HisSvt2 over at Abit's forum claims to have got his Abit BE7-Raid 845PE chipset to run at 800MHz FSB and HyperThreading enabled on a board that should not do it. It is done with a hacked BIOS.

Got my 2.4c today slapped it in my be7-raid set some bios setting and bam ive got hyperthreading and 800fsb goodness on a 845pe chipset.