Legit Reviews decide that they really wanted to be able to show the overclocking results you can expect from the AMD A8-3850, so they picked up eight of the chips to test each for overclocking ability.  There have been examples in the past of chips with a wide variety of overclocking limits which was often decided by the chip revision but not in all cases.  The test results show that all but two of the chips hit a stability issue when being pushed beyond 3679.5MHz, so you can take that as the most likely result that your chip will provide.  The two outlying chips will be exceptional, in one case in a bad way which you can see in the full review.

"When AMD released the ‘Lynx’ desktop platform back in June 2011, our motherboard reviewer ran into some bad luck when overclocking the processor. When you get a new platform setup for the very first time you really don’t know what to expect and it does take some time to learn all the quirks and nuances of a new processor and motherboard. We recently ordered in six more processors and then overclocked all seven of them to see what the best one would be for our test system!"

Here are some more Processor articles from around the web:

Processors