Encoding Machine for streaming - mainly mobo question

[Ajaxx]

So I'm pretty much set on making a 2nd machine for encoding streams on twitch.

I want to go Ryzen as I want the cores + the current discount is too good to pass on.
I've seen other threads with comments like "do you really need" "why waste the money" etc
I am partnered on Twitch, I can take advantage of pushing a high bitrate as viewers have access to quality settings.

But I'm wanting something with a small footprint so was hoping for an mATX build, but it seems with Ryzen apart from the Asus TUF B350 going mATX is very limiting.

I would like to overclock the 1700x but will going B350 limit me much compared to x370 ( which means going ATX and a larger footprint )

This is what I've picked so far. ( I have a case/gpu no so need for those )

I would like to stay below £700

Anything people think I'm missing please feel free to add.

 

[Ajaxx]

GPU will be an old 7850 I have. No need for GPU power as no gaming will be happening on it.

 

[Ajaxx]

No need for Capture card. Everything is going via OBS NDI

^^^^^ this

One element missing


My basket at overclockers uk:

• 1 x Elgato Game Capture HD60 Pro Capture Card - PC= £189.95

Total: £198.65 (includes shipping: £8.70)
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Not sure if your live streaming or recording to edit but allows capture of main system , which would allow take the strain off the main rig is that is indeed recording to be edited by second d machine .
You want primary rig to run as fast as possible , capture card will stop low Mon frame rates or dips in your average .

Another good for thought if your going to stream to the best quality