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However, it shouldn’t make much, if any, visible difference if you’re only driving one extra screen – see some of the YouTube demos mentioned below. You will generally get better results with USB 3 adaptors, because USB 3 is about ten times faster than USB 2. The extra screen may not be fast enough for gaming, but it should be fine for normal office purposes, such as email or news feeds. The bulk of the work is still done by the laptop’s processor, which can mean that everything else slows down. You need one adaptor per USB monitor.Īlthough an external graphics card will usually solve the three-screens problem, there may be limitations.
WHAT DO YOU NEED FOR AN EXTERNAL GRAPHICS CARD FOR LAPTOP MAC OS X
(Although the spec says it supports Windows and Linux, it is clear from the Amazon comments than Mac OS X owners are also using it.) Alternatives include the ClimaxDigital USB 3.0/2.0 to DVI, VGA or HDMI Adaptor (£29.99), the Plugable USB 2.0 to VGA/DVI/HDMI Video Graphics Adaptor Card (£42.95) and the Kensington Universal Multi-Display Adaptor (£65.99). One example is the Plugable UGA USB 2.0 to DVI/VGA/HDMI Adaptor, which costs £37.95. I expect you will need an adaptor that includes an external graphics card. From a position of ignorance, I looked for better-known brands such as Plugable, Kensington and Climax Digital, but readers with experience of multi-monitor laptops are welcome to suggest alternatives below. Amazon searches find lots of examples, none of which I’ve ever used. If your laptop only has one video port, you can use a USB display adaptor instead. These are usually used to “clone” screens, but Windows should be able to set up an extended desktop that bridges two or more screens. The two screens may have slightly different colour renderings, or other differences (brightness, contrast etc), which could be annoying.Īlternatively, if your laptop has a DisplayPort or Mini DisplayPort, you can buy a splitter or multi-monitor hub that will drive two or three screens. This is not quite as good as using two HDMI ports because HDMI and VGA are different video standards.
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For example, you could plug one into an HDMI port and the second into a VGA port.
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Some laptops will support two external monitors if you can find a way of plugging them in.