I highly recommend the SVUSBPOWER spare 4V DC power adapter from StarTech ...
Joshua Szanto, Amazon
17 July 2014
Summary: I highly recommend the SVUSBPOWER spare 4V DC power adapter from StarTech for this. It doesn't make sense not to use it. Even though this product supports power through VGA or USB (can't remember which one), it did not work well for us and so I only gave this product 4 stars. Otherwise it's super!
Summary: I do not use the video portion of this switch as I have a need to see all PC monitors at all times so have 7 monitors on my desk. The use of the switch for mouse and keyboard were my chief reason for purchasing this switch. It switches between PC's in 1 to 2 seconds every time and I switch 20-30 times a day without a hitch. I have found that the built in USB hub also is very useful and a plus ...
Summary: Purchased this KVM switch less than 6 months ago, and it is already malfunctioning, giving intermittent connectivity. I contacted Startech about it, and they recommended I replace the cables, But even a cable I never connected that was still in the bag failed intermittently. While I argue with Startech, I will be forced to purchase a replacement. My previous KVM switch lasted 7 years, and still works (just doesn't include USB). The SV431USB is money wasted; don't buy it.
Summary: It does not come with its own power supply so if you need one don't forget to order it...seems to work OK with out the supply though...there is not scroll lock so you have to press the buttons on the front to change it..
Summary: Switches keyboard, video and mouse plus 2 other USB devices. Generally don't have a problem switching between desktop computers, but it does have problems with laptops - more than half the time only the video will switch over. I think this relates to the drivers within the laptop, but regardless of cause I would not recommend this switch for use with laptops.
Summary: I have ordered several of these KVM switches to use in my office. I've used them for a few years and they still work great. They with the monitors with 1920x1200 resolution. The only thing I had to do was converting VGA cable to the DisplayPort since the new computers now come DisplayPort or HDMI.