My father recently bought some more RAM (4 gb for a total of 6gb). Since he put it in his PC has been acting funny. Now he is getting hard drive fail messages during the boot up. His HD then started making clicking noises which in my past experience means the HD is done. Now he can't boot up at all. I didn't think RAM could do that. The RAM is identical to the other RAM, they're both DDR2 and both PC5200. His HP is upgradeable to 8gb of RAM. Thanks for any help.