Dell may have a serious issue on its hands with their E6400 and E6500 laptops. Hundreds of reports have been surfacing on the official dell support forums stating that they have had 'massive performance issues.. 'whenever the devices get slightly warm the BIOS automatically starts dialing down the performance until they basically crawl to a halt, some indicating that even when cool they won't go over 50% of maximum clock.
The most prominent member of the Dell support forums, Tinkerdude, created a PDF entitled "Performance loss during normal operation in a Dell Latitude E6500 laptop due to processor and bus clock throttling" that explains in detail the problem and potential solutions. The user was banned after this PDF was posted to the forum which leads many to believe that Dell does not want this problem to be known publicly.
Banning a customer from your website for posting a problem is disgusting and a great way to ensure that they never buy your product again.