Drop down your multiplier. I'm running an E2160 at 3.2, using 400x8. Voltage is set to 1.4 in BIOS, more like 1.36 - 1.39 after vdrop and vdroop.
Also, for cpu stability testing, make sure your ram is not running above rated. Going to a 1:1 ratio is your best bet for stability. It shouldn't...