3COM LAN CARD 3CR990B network adapter 3Com 10/100 Secure NIC - Network adapter - PCI low profile -Fast EN - 10Base-T, 100Base-TX in the 3COM LAN CARD 3CR990B 3COM LAN CARD 3CR990B and the 3Com EtherLink 10/100 PCI network interface cards with 3XP processor work in tandem with servers, desktops, and workstations to provide The 3COM LAN CARD 3CR990B has unprecedented performance, intelligence, and data security. This new generation of Fast Ethernet NIC the 3COM LAN CARD 3CR990B is uniquely optimized for Windows XP to reduce CPU utilization and enhance performance by offloading TCP/IP networking tasks from the host system to the NIC's onboard 3XP processor. Running cycle-intensive IPSec encryption algorithms, TCP segmentation, and TCP/IP checksum operations on the NIC's 3XP processor and encryption chip delivers secure, reliable connections while maximizing system performance.3Com pioneered the concept of offloading IP checksum operations in 1998. 3COM LAN CARD 3CR990B 3CR990B-LP-97$99.00