Over the last couple weeks I've been having problems with my Mac Pro. It's kernel panicked once, magic keyboard has experienced quick and sudden loss of connection to the machine, as well as had its battery run out sooner. To top things off, when I woke the machine today it beeped twice like it had a memory error. I have not been able to reproduce this, and AppleCare just had me run basic diagnostics. Any ideas as to what the issue might be?