CPU is air cooled, but has no heat issues under it’s current load. If I did bump into heat issues I would switch to liquid cooling. I’m not positive of a per-core Ghz at the moment, I will check the server a little later.
I know that the GPU is a waste, but when I bought the CPU I cheaped out and overlooked the fact that it didn’t have integrated graphics. Luckily I had an extra GPU on hand, so I settled for using that because I had already opened the CPU box, which voids the return policy.
128GB for how large of a server? Last I checked with 4 players system load for RAM is around 2-3GB. So I’d assume at 40 players we should be around 20-30GB, maybe as much as 1GB/player.