Most of the E-commerce site enabled a SSL for Credit card offload encryption/decryption prcoessing task.The Web servers to spend more processing on content genratin and delivery.When considering an SSL accelerator, take into consideration the number of transactions per second (TPS) it can handle. TPS will be more important on SSL Acceleration appliances than cards. For instance, if you buy an SSL Accelerator Card that can handle 2000 TPS for a server that can only handle 500 TPS, then you waste the money on the 1500 TPS you can't use. An SSL Acceleration hardware appliance (box) can deal with transactions for all your web servers and scale quickly.