Add 2 esata ports to your desktop computer through a pci express expansion slotr r port multiplier technology supports multi drive external enclosures over a single esata cable at speeds up to 30gbpr supports hard drives larger than 136gb with 48 bit lba and a native pci express chipset instead of a bridge chip to ensure fast reliable operationr backed by a startechcom lifetime warranty and free lifetime technical supportr r this 2 port pci express esata controller adapter card offers simple