Excellent Diagram! I definitely think your current ASUS is underpowered for what you're trying to do:
For 1500$ I'd recommend this: (however The Vmix reference builds are probably better resources, this is just my preference after having built with both a K series and X series processor trying to find "the sweet spot")
i7-7800x (28 lane CPU - this will allow you to add capture cards in the future)
cpu cooler - Noctua - NH-U9S (very similar to the NH-U9B just for 2066 socket) just need to make sure it will fit in server case.
MOBO - I'm personally using an MSI gaming pro carbon ac (miicro ATX board so it fits in smaller cases), but you'll want something that has at least 3 16x pcie slots so you can add some capture cards or a 10gb ethernet card later
example - MSI x299m gaming pro carbon ac
Memory - After talking with Tim from Vmix this past week, he confirmed that you really don't need more than 16GB of memory. I've always used 32, but I will be downgrading after hearing that and saving money here in the future. Also I've used both 2666 and 3000 memory and havn't seen a difference, maybe to play it safe go for like 16GB at 3000 Unless you need the 32GB memory for other things.
example - corsair vengeance lpx 16gb (2x8gb) ddr4-3000
GPU - I was just talking about testing the 1660ti but haven't gotten my hands on one yet. I've talked to a few people and some think the sweet spot may be the RTX 2060 (for newer cards) though I've had really good luck with GTX 1070 mini card as a sweet spot price wise. 1660ti though may be a great choice for the price point.
As for power, probably just go with something around 550watts with a gold rating and fully modular so the cables detach from the power supply (this makes it easier to build in your case)
example - seasonic focus plus gold 550w
For Storage, I use the samsung 970 EVO NVME drives for boot up storage (256-512gb), and the EVO 860 SSDs for larger storage (1-2 TB). both are cheaper than their "pro" counterparts. I've not tried lower yet but I suspect that you could probably dip down a bit lower if need be
On PCPartPicker it shows all of these parts together go for around 1300$ us, giving you about 100$ for a case and another 100$ for NVME or SSD storage.
As for cases, so far this is my favorite but I haven't purchase yet, but I've been wanting to get this one because of its smaller size and cheaper price.
https://www.newegg.com/P...e-_-11-147-263-_-ProductAlso, if you don't already have one, put a network switch after your router so you NDI sources can pass through the switch instead of the router. I've seen routers freeze up and become unresponsive when too much NDI bandwidth passes through them. For now since its just the powerpoint laptop you should be good, but as you add more over time, you might end up with some bandwidth issues (sorry if you were already aware of this)
