You might get about 60% to 85% the performance of an FX-4350 in CPU-bound gaming scenarios.
Hard to guess though. I'm using PASSMARK for single thread but if there's actually TWO CPU's there then your performance will tend to be worse than having ONE CPU due to how these motherboards work in sharing data between CPU's.
If you've got a cheap GPU, and want to experiment for fun go for it but I wouldn't invest much in this machine.
Also, not sure what OS you would use. If you want to use as a server then you don't want to be running a traditional W7,8,10 desktop OS that's optimized for gaming.
Probably more issues than I've though of, but it's come up before and never seemed to be a good idea beyond a "just for fun" kind of thing.
*You can download Windows 10 for free initially with (AFAIK) a 30-day window to test things out. So if you want to mess around, AND it has a x16 PCIe slot for a GPU, AND you have a spare or cheap GPU of say R7-260X or better then fire it up and see how it goes. W10 may just have all the drivers you need to get running. May.
If you're serious about gaming though then just NO. Buy a console for cheap, or plan a gaming PC. (BTW, most good graphics cards are way overpriced and may remain so for months due to cryptomining).