theres alot of big gains as you go up. Check mine out at 4.8ghz I got the highest graphics score out of anyone with a 8350 and a single 7870 gpu. But because the first 3 people have the 8350 clocked to 5.2ghz i am unable to pass there scores:
2nd link shows comparison to 1st place. 5.2ghz gives enough to beat me with a better physics score.
Theres lots of improvements in single core performance as you go up aswell. Its worth it if you can cool it well enough
. The difference between 4.7 to 4.8 is probably not worth it if you have to do a huge vcore jump. but if you get up to 4.9-5.0 its probably worth it. (you may not be able to youd be amazed how many clicks up you may have to go to get 5.0 stable.)
I am bout to head to work but good luck
will check back later to see if you need help or your results if you post em