those temps are way over what i would recommend. with core temp i wouldn't even want to be over 60c at load, 80c is very high. 3.5GHz at 1.4V is probably better than my X6800 btw (but then you'r is not 100% stable).
anyhow, its best to fill in your system specs, there a link on how to do it in my sig, and then post a CPU-z shot of both your CPU and memory, but right away i would suggest you look into a third party cooler to get those temps down.
Also try orthos prime, its a dual core prime app that will stress the system far greater.