HDMI cables all look very similar, and in most ways they perform similarly as well. But performances of these cables do vary slightly across models.

In stores, HDMI cables tend to be more expensive. And while it’s true that you don’t need to spend an absurd amount of money on a cable, you do need to take some things into account when purchasing a new HDMI.

1. How far do you need the connection to reach? If your HDMI connection needs to pass through multiple rooms or walls, you may experience a lapse in image quality. The longer the cable, the higher your chance of signal degradation. A 100 ft HDMI cable may suit your needs length-wise, but the longest recommended HDMI length is just 50 feet. For earlier models, 20 feet is the maximum recommended length.
2. What kind of connector do you need? Most people think that a standard HDMI will do the job easily. But while all HDMIs look similarly with a 19 pin connector on either side, the wiring on the inside of the cable is what distinguishes the type of HDMI.
   
   Some HDMIs also have Ethernet capabilities, which eliminate the need for additional hardwiring for devices that require both HDMI and Ethernet connections. Both standard and standard with Ethernet HDMIs are available in highspeed versions as well.
3. What resolution are you streaming at? Highspeed HDMI cables are able to transmit signals at 1080p and can also support 3D video, while standard versions can only transmit resolutions up to 720p and 1080i. For high definition or 3D televisions, highspeed HDMI cables are likely the best options.

When choosing your next HDMI cable, there’s no shame in asking a sales person for a recommendation. If you are connecting a brand new device, do your research and read reviews on the product. It’s likely that someone in a forum will recommend the best connector.

When time comes to buy an HDMI highspeed cable or other HDMI version, be blunt with the salesperson. Make sure that you have some idea of what you’re talking about, otherwise you may end up getting duped and convinced to purchase highspeed HDMI cables even if your device doesn’t require them.