It's a "3.5mm TRRS male to dual 3.5mm female Y splitter cable."

The cable you're describing is commonly known as a "3.5mm male-to-male audio cable" or simply an "audio cable." This cable has a 3.5mm plug on both ends, allowing you to connect two audio devices with compatible ports, such as smartphones, laptops, tablets, MP3 players, or speakers. It's often used to transmit audio signals from one device to another, for instance, connecting a smartphone to a car stereo system or speakers, or connecting a computer to external speakers. These cables come in various lengths to suit different needs and are widely available in electronics stores or online retailers.

An "8-pin male to 8-pin female power line" is a cable used to deliver power between components in a computer or electronic device. The male end typically plugs into a power supply unit (PSU) or motherboard connector, while the female end connects to a component such as a graphics card or CPU. These cables are commonly used for delivering power to high-performance components that require additional power beyond what the motherboard can provide.