So you would like to capture your games in 4K like a pro? The Elgato 4K60 Pro MK.2 has you covered. It has 240 Hz passthrough for your dual-PC setup. Thanks to this PCIe card, you can record unlimited 4K HDR10 footage to your hard drive. You will be able to access your feed in multiple apps.
The device is compatible with OBS Studio, Streamlabs OBS, and XSplit for serious streaming. You can use multiple cards in one PC for complex recording tasks.