Are you having issues? Im unsure what led to this question?
The only issue you are likely to experience is that the first generation phenoms were a bit more power hungry and it may run a bit hot especially if you try to OC without upgrading the cooler, but a good aftermarket cooler like a Hyper 212+ will fix that problem. There is no reason the CPU should be unstable/faulty, AMD wouldnt have sold it if it was known to be.