AT-2973SX 2x 1000SX (LC) PCIe x4 Server Adapter The AT-2973SX dual port fiber gigabit server adapter includes dedicated hardware and processors to process frames at the highest levels in the operating system for both transmit and receive paths. This especially advantageous in virtualization applications. Features Dual Port 1000SX (LC) PCIe x4 TCP offload engine (TOE) CPU Task Offload VLAN Jumbo Frames (9K) Microsoft Certified Drivers Load Balancing RoHS Compliant