Overclocking your FSB also overclocks your memory. You need to adjust the ratio between the two because the memory doesn't handle OCing as well and it will definitely BSOD your system if you don't account for this.
How many Mhz is your FSB running at? Did you adjust the FSB:Memory ratio (ideal is 1:1)?
Also, your load temperature is a little high for such a low voltage increase. Have you upgraded your CPU cooler? Is the ambient temperature in the room high also?
running too hot, and not enough volts. A hyper 212 or tx3 is enough. mine is on a hyper tx3 and sits at 67C under load @ 3.49ghz. I actually has some freezes and am currently running the same as you 1333 fsb, but with much more volts - 1.4v. I also have my HT link voltagge increased, as i found most of my instability was coming from the motherboard, not the cpu.
make sure you turn off any cpu power saving features that will lower your fsb, as this will make my pc freeze. until you get a better cooler though, keep the vcore lower and fsb lower to control heat. you dont want it getting past 70c.