Note that this cable is NOT an ordinary HDMI® cable. This is specifically for connecting a device with an HDMI connector to another device equipped with a Single Link DVI-D connector, typically found on PCs, projectors, and older video equipment before the HDMI standard became widespread. These cables can NOT carry audio. They carry video signals only!
This HDMI to DVI Adapter Cable is capable of video performance equivalent to a High Speed HDMI Cable.
Ferrite Cores are small magnetic blocks wrapped around the end of a cable. They are used to suppress EMI/RFI electronic noise on the cable by absorbing the unwanted high frequencies and dissipating them as very low-level heat. This is the simplest and cheapest form of electronic noise reduction and is most effective on small gauge cabling, which is inherently more susceptible to electronic noise interference than thicker cables.