Allied Telesis NETEXTREME II AT-2973SX - Manual (Page 153)

AT-2973SX, AT-2973T, and AT-2973T/4 NetExtreme II Family Adapters Installation and User’s Guide
153
Solution: This is a Microsoft issue. For more information, see Microsoft
knowledge base KB913119 at
http://support.microsoft.com/kb/913119 .
Problem: Performance is degraded when multiple BCM57710 network
adapters are used in a system.
Solution: Ensure that the system has at least 2 GB of main memory when
using up to four network adapters and 4 GB of main memory when using
four or more network adapters.