Right ........now we have faulty memory out of the fault find ....it's down to BOIS, board or memory compatibility in that order.......(Memory is an outside chance)
if you have the latest BIOS roll back a version or two.......if you are not running the latest Bios version ....do that in stead.
If you can possibly help it do not use @Bios .....QFlash will be better ..... remember to NOTKeep Bios data when flashing ..... if you still have the same issue.....odds on you have a crook dimm slot on the board .....or a very , very outside chance of memory that is not compatible with your specific board ...... does it appear on the compatibility list on the memory or mother-board manufactures website ?
Just out of curiosity.... of the four memory slots......which ones are you populating ?
Aussie Allan