Phc7006: Anyway you don't want to try a FX 8xxx in a M-Itx based rig. They are thermally inefficient designs, and are inferior to Ryzen in all respect.
Alm888: It is a popular misconseption that FX processors are hot. In reality they are not. Right now my FX-8320E is only 17.1°C according to lm_sensors. This is due to "Cool'n'Quet" feature (or "PowerNow!"??? I can't remember all this marketing BS ;-) ) and most of the time it works at 1400…1800MHz (with nominal 3600MHz). And even on hardest stress (3D rendering, 100% usage on all 8 cores for several hours) the temperature does not rise above 70°C (this is mostly due to dirty radiator and cheap thermal grease "КПТ-8" which I am using). And no, Intel high-end processors are not cooler (i7-4790K is as hot while ~40% faster).
Phc7006: A Ryzen 5 1400X would be 30 to 40% faster than a 8370K, while generating less than the half of its heat!
Alm888: AMD® is no Intel®, there is no "K" after FX-8370 :-). And I would not recommend getting FX-8370 model. It s basically overpriced FX-8300. The only viable model is either FX-8320E, or base FX-8300, depending on which one is cheaper (different stores give different prices).
Phc7006: FX Cpus nowadays can only be justified to build a relatively inexpensive desktop in a well ventilated case
Alm888: They are OK for low budget workstations, I'd say as good as i5-6400. But I'd stay away from "AXX" FM2plus-based APUs. One can not make an eagle out of two turkeys (weak CPU and weak GPU welded together).
See, that's where I'm limited and I agree with you about AM3+ CPUs, Alm888, especially the 8320E, but even Ryzen already has a Mini-ITX board. Whereas, I have yet to see any Mini-ITX boards for the AM3+ socket.
Whereas, AM3+'s smallest offering is a micro. I love this processor but it would be very expensive because in order to accommodate it, I'd have to get a new case, new cooler, new motherboard and sacrifice my portability, which surprisingly does come in handy.
Excluding the amount of research I have to do on a new case. I did look into that CPU and you're right, it looks badass and for people who have Micro builds and larger it is amazing but, unless the motherboard gods are willing to smite me with a AM3+ socket in the next month or 4, the next best thing is either an Intel i5 on sale or a FM 2+. Maybe even biting the bullet on a low end Ryzen.
Like I said though, I've researched this CPU and it has great reviews and for most people, it'll probably be fine but with no Mini-ITX form factor availability, it is a bit useless for me.
Also, since the prices of the previous AMD CPUs has gone down due to the arrival of Ryzen, it is a great time to upgrade in general and it might be great for game like Witcher 3, which (pun intended?) I've read, use more CPU, probably because a lot of Open-World RPGs like CPU power. However, like a boy waiting for the summer sale, I'm looking forward to Threadripper's release to see how Intel and AMD slash their prices.
Overall, I guess its release is good for the old stuff and the new stuff.
Edited: To add more things and to remind myself to order
Pizza.