HDMI Switch 4k, HDMI Splitter Switch 5 In 1 Out HDMI Switcher with IR Remote Support 4K 60hz, 2K, 1080P, 3D, HDCP 2.2, UHD, HDR for PS 3/4, XBOX One/360, DVD Player, HDTV, Projector
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Though there are some unpowered splitters on the market, you're probably better off getting a powered one. They're only slightly more money, and there's a better chance your setup will work without dropouts or connectivity issues.
HDMI switch takes multiple sources (Xbox, Roku, cable box, etc.) and sends one cable to your TV or other device You won't need to worry about those, of course. For most of you, a 3x1 or 4x1 switch is all you'll likely need. Tips for buying and setting up an HDMI switch or HDMI splitterIt's also possible that Nintendo is simply using some 4K-ready hardware in its console chain ahead of a 4K model. It's likely cheaper to buy 4K-ready chips en masse, and Nintendo may have made the business decision to invest in certain chipsets and cables preemptively, even if they're not being used to their full potential just yet. If you want two displays going at the same time, keep in mind the maximum resolution for all is whatever the lowest resolution display is. So if you have a 4K source, a 4K TV and a 1080p TV, the 4K source will only send 1080p. The splitter won't convert the signal to 1080p just for that TV. Splitters, and many switches, will be labeled in their name with the number of inputs and outputs, respectively, separated by an "x". So a "1x3" splitter will have one input sent to three outputs. The gold standard for the mClassic would be an onscreen interface you can use to see performance metrics and tweak what effects the mClassic applies and how it applies them. A silver medal would go to the mClassic if you could simply connect it to a PC via USB and change its settings in a piece of software. Either way, having control over your image is what I’m after, and even if the mClassic doesn’t get more effects, just the ability to tweak the ones it already comes with would be a massive win.
But most importantly, I want tweakable settings. On PC, there’s a piece of software called ReShade that does what the mClassic does: adds post-processing effects to games. The thing is, though, with ReShade, you can choose from a huge list of effects, tweak their settings to an extremely fine degree, and get access through a convenient on-screen display to a ton of different performance metrics. It’s basically an easy way to make any game you’re playing look great, and it’s sort of the third-party, community-led version of NVIDIA Freestyle. A switch takes multiple sources, in this case two game consoles and a laptop, and sends them to a display. Main image: Univivi, TV: LG, Screen image: Geoffrey Morrison/CNETHowever, as dataminer @SciresM points out, the Realtek chip could be there to support improved audio transfer, or to support the introduction of an Ethernet port – new to the Switch OLED – rather than necessarily 4K upscaling. Meanwhile, unlike the mislabeled devices mentioned above, there are devices that combine a switch and a splitter in the same box. A "4x2" switch is also a splitter, with four inputs and two outputs. It can send any of four sources to two TVs.