What is your ram voltage set to in the bios, as you may need to raise it.
L2 cache is something to do with cpu isn't it?
what bios you on? f12?
manual says it has dual bios, tried the other one?
could you try the ram from your friends PC in yours first to see if it boots? what did you try?
did you get it working? curious to know
that's good then,f7 is very early bios
I found f12 to be the most stable