AMD Radeon HD 2600XT and HD 2400XT
 

Although the initial information was that AMD was going to launch the
entire product gamma at once, from the strongest HD 2900XT all the way down
to the weakest HD 2400Pro, something obviously went wrong. Therefore, it is
only now that we received samples of their mid-range cards. However, first
test leaves plenty to be desired.

http://www.insidehw.com/content/view/159/9/