PE 2650 Built-in Network Adapter Problem

Hello. I have a problem with PE 2650 and his built-in network adapter Broadcom NetXtreme Gigabit Ethernet. I have exactly five 2650 servers - two with Widows 2003 and three with Windows 2000 Server. On servers with Windows 2000 Server using Preformance Monitor I notice that the Output Queue Lenght counter shows very high values - from 167 to 188. This value should be max 2. I suspect that there is driver probelm, although one of this servers have driver 6.34.4 and two others have 7.100.0. On servers with Windows 2003 there is no problem. I'm not completly sure if this is hardware of sysytem operating problem.

If anybody had such problem, please for help.

Pawel