Have it running on Windows 10 and it's going well with the 16GB RAM it has. Was going to whack Linux on it, but I'll be using it for my degree and that is being troublesome enough as it is, without adding another complication!
I've not looked how much this board can take (ASUS P8Z68-V LX), but I imagine it's 32GB or something. I'm well out of date with processors and all that stuff now.
😀.. I am hardly current too. 64Gb is commonplace now, but I am only hosting 32Gb.