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#1 Posted : Saturday, April 27, 2019 2:42:39 PM(UTC)

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I have read many post on the site about hardware and looks like many lean towards i9-9900X or higher.

I have not seen any info on what it takes to support a computer NDI system. Does anyone have any recommendations on hardware to build a pure NDI system?

I may have 1 SDI card in it for the ability to output a channel or 2 in a pinch but moving all my systems to NDI and want to build out a system for my larger events. I have a system that using SDI and that works fine but finding I now need to redesign for NDI.

Any thoughts, suggestion, or advice is most welcome.

Supporting camera system.

12 NDI inputs
4-8 NDI outputs
Multi-Recording of all Inputs + Program. (this might be second recording system)

Those are the basics. Imagine there is no real budget but give advice on if I bought a
AMD 2950X
AMD 2990WX

SSD vs M2/M4

nvideo 2060 vs 2080Ti

If I have an idea where NDI needs the money spent I could budget it around the solution.

I will be building a 4 input 2 output NDI with other items I have working but those are easier to do. I'm now just looking for information on building the larger switcher and recorder or 2 different systems as required.

thank you in advance.

#2 Posted : Tuesday, April 30, 2019 6:58:07 PM(UTC)

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I7 7800x (400$ newegg) would be my recommendation to give yourself 28cpu lanes vs a K series processor which will only have 16 lanes.

With the 28, 16 of those lanes will be dedicated to your RTX2060 (which is a great choice and sweet spot I think price to performance), leaving you with an additional 12 lanes to play with. Then I would add in a 4pcie lane 10gb ethernet card like the ASUS XG-C100C (100$) and pair that with a small 10gb switch like the netgear GS110MX (200$).

This will allow you to connect multiple NDI sources to the switch at 1GB a piece but then have a 10GB pipe to your computer alleviating any bottle-necking issues if you were to just connect all that to the motherboards 1GB ethernet port.

Then you have an additional 8 lanes to play with, could add an additional 10gb nic in the future, or maybe an 8 chan sdi card, or a 4 chan, but definitly your 1 chan sdi card will be fine, but at least you'll have room for some expansion. I personally do the decklink quad 2 for 8 sdi channels, and then I swap between a decklink duo 2 (for 4 more sdi channels) or the 10GB ethernet if I'm doing more NDI based stuff.

Unless you're using almost all NDI HX devices which will compress your ndi signals down to 8-20mbps, your NDI sources will all be coming in and out at 80-120mbps, and you're going to end up needing a bigger pipe to get all that data through.

Do the M.2 for your operating system (250gb should be plenty if you want to stay cheap). Then add SSD drives as needed for recording and put a hotswap bay in the front of you machine in the drive bay -- i put this ICY dock hot swap sdd bay(25$) in all my machines and it has been great - https://www.amazon.com/g...04_s00?ie=UTF8&psc=1

#3 Posted : Wednesday, May 1, 2019 1:06:27 AM(UTC)

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Thanks. I have a 10GB network already designed and hardware that I have been using. Fairly confident in that design.

My greater concern is the amount of NDI processing as I'm trying to avoid all SDI(except a fallback card. could be a 1-4 channel).

I have long cable runs and running a 10GB x2 (redundant) fiber from the stage area to production location will free up a lot of the issues with having to run 1000's of ft of redundant SDI currently. Also, not to mention, much easier to route signals to displays and various screens once the video is all IP based.

I have heard that even the fastest i9-9980X will have issues. This is my concern. As I have all Full NDI(not NDI/HX) as the new design and want to make sure it is possible.

Any experience with running that many NDI? Or less. The CPU to NDI channel chart is what I'm looking to learn. How many Full NDI sources can a certain CPU handle. Encode/Decode.

thanks for the suggestions on the other parts. I'll be looking at those.
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