Decide Between VGA, DVI, and HDMI for Your Monitor Connection. Hassle-Free PC By Rick Broida, May 18, 2010 6:26 pm PDT. Reader Mike ordered a new Dell system that came with a 21.5-inch LCD monitor.

Ballpark figure for a HDMI to VGA decoder is around 200 mA at 5 volts. That's a watt. For such a small device, you're going to expect that to make it fairly warm.

Thunderbolt Gen 1 and 2 don’t support USB 3.1, Type C or even 3.0 for that matter. An adapter wouldn’t have fixed this problem. However, Apple is releasing Thunderbolt 3 later in 2015.