Grant it this is an old post, I found this machine in my moms garage so I figured why not OC it for fun. The max I've found the board to allow is 772Mhz overclock. That's with a 160 Bclk and QPI and Uncore voltage set to +160mv. I threw in 8G's of 1600mhz memory I had laying around and brought the multiplier to 10 so they run at 160x10= 1600mhz. Its stable and cool runs at 3372.15mhz @ 1.232v. The motherboard wont allow any further overclock as it Uncore and QPI multipliers are locked in at 24x so its QPI GT/s is too high at 7708 (over 7k is shown to be unstable) passing 160 Bclk results in a 4 beep on restart which is memory failure.