HOW ABOUT $100 for a low end board with 512MB? At the same time the board is AGP or PCIe and will have support for HDR and Shader model 3.0? There will be solution for you. It's called RV515 and will be known as Radeon X1300, AGP of course.
At this time we can only confirm that Radeon X1300LE comes as an AGP card while we are not sure whether ATI plans to offer a Radeon X1300 PRO card as well.
The RV515 LE, Radeon X1300 LE is targeting 450MHz engine clock and 500MHz memory while Radeon X1300 PRO is targeting 600MHz clock with 800MHz memory. We know that X1300 LE comes in PCIe version supporting Hyper Memory configurations and this card will have memory working at 400 or 500MHz and the core running at 450MHz.
All those cards are 90 nanometre, derived from R520, have four pixel pipelines and use Shader Model 3.0. The card also has 128 bit memory interface, and supports Avivo video. RV515's 90nm manufacturing process enables feature integration previously unheard of in this price category such as Shader Model 3.0 support, 128-bit memory interface, Avivo video and display technology, a four way memory controller, Hyper Memory support and can address 512MB or even more memory on the card.
These cards should be available at launch on the first week of October. µ
SM 3.0, Avivo, 2,800 3dmark05 almost as good as a 6600GT and a msrp of 99$ (street prices will be lower) ! Damn what else could be a sweeter deal 
Yeah that's icing on the cake 
