Unfortunately, you need TWO Arc770LEs - and I seem to be the only one crazy enough to have bought two of the original cards when Intel was producing them, and 3rd party cards cost more - though you can find people who are selling their old ones to buy new cards (though some are only 8gb vram - not the greatest).
Acer makes one, but try to find them in stock …
It’s a shame, because pretty much everyone here likes their A770s.
Maybe next week when I have some spare time … though I also think that, with a lot of people migrating to 4k smart TVs, there’s a need to warn people not to connect them to the internet (one vendor is already serving up overlay ads), and to disable windows telemetry (which was the source of almost all the hard faults I was seeing). The sim has its’ own built-in telemetry, so not affected.
Intel Deep Link is supposed to offload tasks from the discrete GPU (dGPU) to the integrated GPU (iGPU) for things like streaming. But if you have 2 Arcs, I found a trick to get the second dGPU (which usually sits at 1-2%) to peg itself at 99% (without overheating because it’s only doing calculations, not outputting through HDMI or DP, which is where the bottleneck is).
In theory, you could stuff a 3rd card in, but you’d probably reach the point of diminishing returns.
Same as the simple trick to eliminate fish-eye when stretching the display window “extra wide” over multiple screens. Cockpit view doesn’t have fish-eye. It also gives a performance boost because the cockpit acts like a mask, leaving less of the outside view to be rendered. And if you’re using a yoke or hotas or joystick, it’s still better to use a gamepad to look around - much better granularity, much finer control than a 4 or 8 position hat switch.