I too had a Venice 3000+ using a Thermalright XP120 cooler and got it up to 298x9 (2.66Ghz) rock stable
The voltage was quite high tho (can't remember exactly what) but the temps were reasonable (<60 degrees). It flew tbh, and for the money it was an absolute steal 
Be warned tho that any increase in frequency or voltage WILL result in a temp increase. I mention this because one post on here said that overclocking without increasing voltage will not result in a temperature increase. This is incorrect.
The heat energy produced by a component will increase linearly with an increase in frequency. The heat energy produced by a component will increase exponentially with an increase in voltage. Hence the temperature will be more susceptible to change from voltage, but will still increase from frequency as well. A combined increase of voltage and frequency is obviously going to increase the temperature significantly, but so long as you monitor this and think about your cooling then I doubt you'll have problems
The voltage was quite high tho (can't remember exactly what) but the temps were reasonable (<60 degrees). It flew tbh, and for the money it was an absolute steal 
Be warned tho that any increase in frequency or voltage WILL result in a temp increase. I mention this because one post on here said that overclocking without increasing voltage will not result in a temperature increase. This is incorrect.
The heat energy produced by a component will increase linearly with an increase in frequency. The heat energy produced by a component will increase exponentially with an increase in voltage. Hence the temperature will be more susceptible to change from voltage, but will still increase from frequency as well. A combined increase of voltage and frequency is obviously going to increase the temperature significantly, but so long as you monitor this and think about your cooling then I doubt you'll have problems
