We have to remind you that this chip has been a great seller for ATI and this chip actually gives Nvidia's 6200 and especially the 7300 really hard time. It is just selling better as the price is right and the market accepts it.These GPUs should be ready by June just in time for Computex.
RV516 will be even more profitable for ATI as the chip tends to be roughly 20 percent smaller and therefore cheaper. It will end up cheaper if the yields are good, but there is a good chance that for some time you will be able to buy both RV515 also known as X1300 generation and the new 80 nanometre RV516.
Source: The Inquirer.