Our system is pretty much the recommended system for a 2 x quad system, but if we have more than 6 inputs, the inputs start blinking.
Here is our spec:

Motherboard: Asus Tek Z170-AR LGA1151
Graphics Card: Geforce GTX 1060 6Gb
Capture Card: Blackmagic quads x 2
Processor 17 7700 3.6 GHz, Kaby Lake 14nn tech
Ram: 16GB Dual Channel @ 1070 Mhz
windows 10

Here is the recommendation: https://www.vmix.com/pro...erence-systems.aspx#ruby
Motherboard: Gigabyte Z370 AORUS Gaming 5 or Gigabyte Z370 AORUS Gaming 7 (Intel Z370)
Graphics Card: NVIDIA GeForce GTX 1060
Capture Card: AJA Corvid 88 or Blackmagic Decklink Quad 2 - we use 2 x quads
CPU: Intel Core i7 9700K 3.6GHz+
RAM: 16GB (2x8GB) DDR4
Operating System: Windows 10

Any help/suggestions much appreciated,
Thanks,
Alan Costello

Thank you for that Ice, very good of you to help - we have 2 x 4 input quads, not the 2 x8 input quads.
That is a total of 8 inputs.
The Motherboard I am using has dual x8 mode; single card: x16 mode, x4 mode (Type CPU, DIMM 288-pin, PCI, PCIe 3.0 x1, PCIe 3.0 x16)
But I don't know how many lanes that is.
You say more than 1 mulitchannel card needs x299 with obsidian CPU - is that the same whether they are 4 input quads or 8 input quads?
Thanks again,
Antardwip