Well, you have omitted a lot of crucial information, so:
What are your temps like with Realtemp or Coretemp under load and what cooler are you using?
What exact ram do you have?
Did you try to work up your OC in small steps or just go from 3.2 - 3.6 ?
What other voltages besides vcore did you change?
What is the vdroop of your board (Bios setting vs Cpu-z)?
Well, I would download Prime95 for your stress testing, just because everyone is very familiar with it and what it will mean if it fails on say small FFT vs Blend test.
Second, I would lower the cpu multiplier to 6 or 7 and raise your FSB to 450. This will allow you to test your ram at 900 vs the 800 it is certified to run at. You may have to raise your NB voltage and may even have to loosen up your timings (6-6-6-20) to get it run at that OCed speed. Once you determine that your ram will run at 450 you can work at raising your multiplier back up and getting your cpu stable at 3.6 Ghz.