Oh yeah I've already done that. I should've elaborated when I originally said I tried different combos. I tested the PSU separately with a paper clip and it was fine. I tried booting up with only the CPU and this got nothing. Than I tried the RAM in different slots and just to be sure I used RAM that works from two other computers, yet still no beeps.
Like I said, I'm assuming its the Mobo or CPU. Should I just replace both of them just to be safe? I just don't wanna have to pay to ship both of them back off.