I had a Phenom-II X4 before and my temps were lower than that. I had good success with aftermarket coolers for this CPU. However, the stock cooler was just awful, too noisy and temps were too high.
Are you using stock cooler? Do you have a case with good airflow? You should have at least 1 x fan for intake and 1 x fan for exhaust in your tower, that's the bare minimum for good airflow in a gaming computer. For instance, I have a Antec Nine Hundred and it has 2 x 120mm fans for intake and 1 x huge 200mm fan for exhaust, helping to keep all components cool.
if your runing an over clock turn it down and reduce the volts. 70'c is to high for that cpu 61-62 is the safe maximum.
if your not running an oc then the cooler you have is eather unstable for the job in that it cant handle the thermal output, or its badly fitted and will need re-mounting.
also make sure the thermal paste hasnt turned gritty. the stock paste on amd cpu's tends to grit up with dust and dirt. so needs to be replaced after about 2 years.