I have 4 PCs connected to my Dell UHD 27" monitor, Intel NUC i7 with Windows 10 Lenovo X1 Carbon work laptop with Windows 7Mac-Mini with CatalinaDell XPS 8300 with Windows 10I I bought a different brand of 4K KVM switch. The display quality was terrible and it didn't work at all with Mac switching time around 2 seconds - not lightning fast but not a problem either. Very happy with quality, functionality, size and looks (and lack of tone).
Enhance Productivity with CKL HDMI KVM 2 Port 4K 30Hz Dual Monitor Extended Display (CKL-922HUA)
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4 Port USB 3.0 Switch Selector - Pubioh KVM Switch for Mouse, Keyboard, Printer, Scanner - 2 in 4 Out Sharing Box with Switch Button and 2 USB 3.0 A to A Cables
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๐ HDMI 2.0 4 Port KVM Switch with 4K@60Hz, 2K@144Hz,1080P@120Hz Support, 18Gbps Bandwidth, USB 2.0 Keyboard/Mouse/Printer/Monitor/PC Selector, Audio Out/Mic In, HDR10, Dolby Vision, Dolby/DTS, HDCP2.2 Compatibility
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TESmart 1080P 60Hz USB VGA KVM Extender Over Cat5e Cat6 Ethernet Cable - Long Range 984ft/300m (Sender+Receiver)
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Computer case Deepcool Matrexx 55 MESH black
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Computer case be quiet! Pure Base 500 black
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Computer case Deepcool Matrexx 55 black
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Fractal Design Define R5 - ATX Mid Tower Computer Case - High Airflow and Silent Optimized - Includes 2x Dynamix GP-14 140mm Silent Fans - Water-Cooling Ready - Black
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