Will a AMD FX-8350 FX-Series Eight-Core cpu fit on my HP H-RS880-uATX motherboard?

Sadly for you, there is no motherboard sold at consumer level that offers a dual socket for AM3+ (the socket you need for this CPU). And AMD has given absolutely no pointers at the fact they would be doing one. One the AMD side the option you would have for dual socket motherboards would be: socket G34, which is completely dedicated to servers.

The Intel side offers a dual socket 2011 board for workstations and gaming alike, that seems to be a lot more like what you are looking for, it's a mix of server/workstations capabilities and high powerd desktop. Here is an example: ASUS Z9PE-D8 or even an SR-2 However I suggest you update your question so that you can can add what will be the general uses of this machine, as we could suggest alternatives or solutions, seeing the GPU youre adding to it is dedicated to video games, it leaves me with a big question mark as for what you want to do with this. EDIT Thanks for the precisions on your use of the PC, I personally think a multi-CPU platform would be extremely underused and a bit of overkill, you could think of waiting a bit for a 4770K and heavily overclocking it with a good cooling loop.

Or you could go for a LGA2011 socket CPU that cost more. But then again, after you buy that GTX780 for 480euros there's only 520euro left for the entire resto of build, that directly forces you on haswell(4770K) IMO. The rest of your efforts should go into finding 2133-2400 RAM that run at that speed at CL11 and a board to house it all.

Multi CPU motherboards are for servers. One FX-8350 has 8 cores, and gaming only uses to 4 cores. 16GB ram is for video editing.

Gaming would only use 4 of it plus 4 max for windows processes and others running. Never heard of Nox Urano. It appears to be a Spain or Mexico availability.

It has 70A at 12V single rail. There is very little information reported about it, but do not confuse the supply with a Corsair TX750 of high quality.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.