What RAM would you recommend to replace the ones on the spec linked below. I think the old ones are playing up. Had a few BSOD indicate problems with RAM. Ideally want 8-16GB £70 max. Probably not going to overclock them, probably what burnt them out 
Also, would I have to edit the BIOS setting the first time I boot up the machine with them?
Thanks in advance.

Also, would I have to edit the BIOS setting the first time I boot up the machine with them?
Thanks in advance.