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it says the i7-6500U is about +31% faster in single-core speed than the FX-4100.
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And an FX4100 can rather easily overclock 31% to 4.5-4.6Ghz which should bring parity at single thread performance. While single thread still rules for gaming neither processor is going to be a beast for that: but it should utterly destroy it multi-threaded which is more important than ever in today's OS's and apps. That will make the whole Windows 10 and web browsing experience much smoother, given sufficient memory. Push it even further, 4.6-4.8Ghz is commonly done even on decent air coolers, and get the better of it all around.
But the thing OP is comparing to is a "U" suffix laptop part with 15W TDP...wouldn't that normally be extremely...