These cheap older xeon chips are interesting but the trick is really to find a cheap motherboard that can support one. The reason they are so cheap is because its hard to find a decent motherboard to use one with. That said there are a few 6 core xeons that can overclock and those are the ones you want to look at. I think the one you mentioned is probably one of them, but I'm not sure.
That said, you would be a lot better off to just overclock your current CPU to 4ghz and get a better GPU. Unless your going 120hz+ 1080p gaming, your CPU would hold up just fine with a decent overclock.
Edit: I see you say this is not for gaming. What is it for?
250GB nvme + 500GB SSD + 4TB HDD
Samsung 4K 65 inch TV
Pixio PX276 27inch 144Hz 1ms 1440p
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