Do what Matt said.
I assume you are running a CPU capable of 2.5GHz, so you should try:
1.45Vcore, 2.8Vdimm, 3-4-4-8 (cas-trcd-trp-tras), 200HTT, 10x multi, 1:1 divider.
"Or maybe I just wasn't meant to overclock afterall..."
That's foolish :P We will make a hardcore overclocker out of...