A 6-pin to 4 SATA cable is typically used to power multiple SATA devices (such as hard drives, SSDs, or optical drives) using a 6-pin connector, often found in power supplies, particularly those used for PC builds or upgrades.

Here’s a breakdown of what this type of cable does:

• 6-pin connector: Usually, this refers to a PCIe power connector (6-pin), which is commonly used to provide power to graphics cards or sometimes power supplies in PC systems.
• 4 SATA connectors: These are the power connectors designed to provide power to SATA devices. Each connector powers a single device, such as a hard drive or SSD.

The 6-pin to 4 SATA cable is commonly used when you have a limited number of SATA power connectors on your PSU but need to power multiple SATA devices. The 6-pin end would plug into a PCIe or another compatible power output on your PSU, and the 4 SATA ends would provide the necessary power to your drives.