there is 2 vms with gpu pass through running windows 10 within the system feeding out to 2 sets of keyboard / mouse / monitor , the idea is condensing hardware down to 1 box to keep 2 people doing their day to day which includes gaming while also providing a redundant Nas solution. so the system will provide the same level of performance as a bare metal box give or take 1-2% for the extra overheads.
i have used unRaid for this in the past the question isn't about is unRAID the best option.. the question thats being asked is about real noticable performance difference between the 2 cpu's in a gaming scenario being the fx 4130 and the E5520 xeon there is a moderate disparity in overall clock speed 2x the threads available, in certain games that can leverage the extra threads i assume despite the lower clock i should see a similar level of real world performance, however i dont have the xeons on hand to benchmark and quantify that.
i was hopeing that someone might have a similar set of processors kicking around or have some numbers i havent come across on the internet to properly quantify the real world performance difference.