![]() HDMI has been used to connect flat screen TVs to DVD and Blu-ray players, DVRs, computers, and more since 2003. Best of all, it’s backward compatible, so you can plug USB 3.0 devices into USB 2.0 ports and vice versa. That’s potentially half as fast as Thunderbolt at a much lower cost. USB 3.0 improves on that with over 10x the bandwidth of 2.0 plus bidirectional support, so your PC can both send and receive data at up to 5 Gbps at the same time. USB 2.0 is 40x as fast with 480 Mbps of bandwidth, which makes it great for almost everything. USB 1.1 tops out at 12 Mbps, which is fine for keyboards and mice, decent for 802.11b and g WiFi cards, adequate for printers and scanners and slow-burning CD-RW optical drives, and horribly slow for hard drives. It’s been around since 1996, although it didn’t really go anywhere until the first iMac shipped in August 1998. USB is ubiquitous and cheap to implement. It’s not an inexpensive technology, and while every Mac introduced since 2011 has it, hardly anything else does, although it looks like Acer is embracing it. Thunderbolt supports both PCIe and video. No, you can’t buy a Thunderbolt PCIe card. Thunderbolt is fast – so fast at 10 Gbps that it has to be built onto the system board. Here’s a brief overview of the four technologies covered in this article: Thunderbolt USB, HDMI, PCIe Cable: How Does It Compare? on Cnet, it looks like we’re going to have yet another port war in the PC world.
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