Whether you want to stream console games on Twitch, or record footage from another computer, capture cards are the way to go. Most popular options go for $150 or more, but right now you can get AverMedia's 'Live Gamer HD 2' capture card for just $99.99—a reduction of $70 from the previous price.
This model can record 1080p video at 60FPS over HDMI, and no drivers are required for Windows 8.1/10. It's compatible with XSplit, OBS, and other popular streaming/recording software. The only real downside is that it's a PCIe card, not an external USB device, so you'll need an extra card slot on your motherboard.
AVerMedia Live Gamer HD 2 Capture Card | $99.99 ($70 off)
This PCIe card can record video from an HDMI port at 1080p/60FPS, and it works with OBS and XSplit. Buy at Amazon
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