I've got a Cisco FastHub 600 in our rack that connects to our support dept. We got 2 new Dell Dimension 2350's with Broadcom ethernet controllers. Long story short - Terrible network performace - Links that take 1.5 sec are now 25 sec. - Solution? We put a D-Link $49 special switch next to the new PC and bang back to high speed performace. The Broadcom card is 10/100 the switch is 10/100 the Cisco Hub is 100 only. I've tried going into the software (XP pro) and chaging the network card to 100 half and full instead of Auto but no success. Any ideas on why adding that switch in the middle would take care of this problem?