Purpose Built Render Machine

[Fleursoup]

Hey! Back for more advice. 

I am a Premiere and Avid editor and more recently I've been running into longer and longer render times as well as instability. I'm currently using a 2016 Dell XPS 9550 for the bulk of my edit work so you can see my issue.

Because of this I've been looking into building a hyper optimized PC which I can use solely to render HD and UHD video for about $1200 US. 

Any suggestions or advice is greatly appreciated!

[XR6]

For this I'd definitely go for a Ryzen CPU

PCPartPicker part list / Price breakdown by merchant

Type	Item	Price
CPU	AMD - Ryzen 7 2700X 3.7 GHz 8-Core Processor	$308.99 @ Walmart
Motherboard	ASRock - Fatal1ty B450 GAMING K4 ATX AM4 Motherboard	$102.98 @ Newegg
Memory	Corsair - Vengeance LPX 16 GB (2 x 8 GB) DDR4-3000 Memory	$129.99 @ Amazon
Storage	Samsung - 970 Evo 250 GB M.2-2280 Solid State Drive	$77.99 @ Amazon
Storage	Seagate - Barracuda 2 TB 3.5" 7200RPM Internal Hard Drive	$59.89 @ OutletPC
Video Card	Gigabyte - Radeon RX 580 8 GB Gaming 8G Video Card	$288.00 @ OutletPC
Case	NZXT - H500 (Black) ATX Mid Tower Case	$69.99 @ Amazon
Power Supply	Corsair - RMx (2018) 750 W 80+ Gold Certified Fully-Modular ATX Power Supply	$99.99 @ Amazon
	Prices include shipping, taxes, rebates, and discounts
	Total (before mail-in rebates)	$1197.82
	Mail-in rebates	-$60.00
	Total	$1137.82
	Generated by PCPartPicker 2019-01-03 16:05 EST-0500

Something like that should work. Even without the mail-in rebate it's just under your budget.

[Electronics Wizardy]

For premiere there is a extention www.voukoder.org That allows you to gpu exporting on nvidia and amd gpus for much faster exporting, and let you use x264 and x265 which are better encoders that what is included in premiere(so better quality for same time, or faster for same quality)