3M's 8ES4 and 8ES8 Series (also known as 3M™ SlimLine Twin Axial Cable Assembly (SFF-8654)) is designed to maximize space and make that next generation connection for SAS and PCIe. The passive copper cable assemblies utilize 3M™ Twin Axial Cable Technology, making them a highly-routable, foldable, and low profile high-performance assembly ideal for SAS and PCIe interconnect in storage, networking, and high-performance computing applications. It also provides more freedom to design folded cable assemblies optimized to maximize system density, streamline system assembly, and enhance airflow. Route it through narrow openings between server components such as fans, memory modules or heatsinks. Stack it into a harness design. Optimize cooling. Streamline your installation.