S5000PSL Motherboard with CPUs, 32GB DDR2 FBDIMMS (Kippax LS25)

This board is quite antiquated at this point, but you can game on it. I don't recommend it, but you can't beat free. Or, if you wanna just learn about server hardware before biting the bullet on a super expensive system blindly, it's an option. They're basically just big PCs though.

I'm pretty sure it has the 2.5ghz quad core Xeon E5420 cpus in it. So 8 cores in total.

This was running and pulled from a working environment in 2018. Was used as a fiberchannel target for a whole rack of machines. Now I've consolidated most of the machines i have into a single AMD EPYC server, so there's a lot of old hardware to go up on freegle shortly. Most of which is absolutely stacked with memory.