These CPU's while not designed for gaming in mind are actually capable once overclocked. I game on my 7980XE overclocked and also have the other Intel mainstream stuff (all brought prior to Ryzen third gen before anyone wants a pop) and its more then capable. Its not actually to hard thanks to being able to overclock on a per core basis with these CPUs down to voltage level to have some of the better cores sitting at higher clock speeds. As can be seen from few of the gamers nexus benchmarks when overclocked the 10980XE does reasonable in gaming, using gamers nexus as he shows plenty of the CPU's also overclocked.
Am I saying get these CPU's for gaming, nope, but tweak them right and you can game pretty nicely on them. For me aside from some games like Civ 6 and Warhammer 2 during end of turns with AI, the limit is usually with the GPU (abit on a 100hz panel), Only game that comes to mind which seems to really dislike these higher core count stuff is FC5 from what I recall, but even then I was usually GPU bound.