Slow internet connection on Server2003

Hello guys. This is my first thread and hope to get some assistance here.

I have four servers running Windows Server 2003 sp2. They all are part of workgroup. All have same configuration and hardware. All have 1Gbps bandwidth but only one server has fast internet connection. The other three servers' internet connection is painfully slow. It takes minutes to load any web page and sometimes it times out. bytes send/received per second is never more than 300.

My servers are placed in a company which has domain system. The internet connection on their pcs is really good but mine. I have tried IE and Firefox both, but no difference. checked all settings of the IE, no difference. Updated the driver for NIC (Braodcom BCM5708C NetXtreme II GigE) to the latest ver but still same issue.

Any kind of help will be greatly appreciated.