We are quite sure that those cards won't use Turbo Cache as the AGP interface is one way only and it's not wide enough for all of the data. This leaves Nvidia and its partners with two options. To base 6200 AGP on NV43-V chips used in 6200 standard or to base them on NV44 cards used in 6200TC.
This will put some additional pressure on ATI, as it still does not support Shader model 3.0. We know that ATI will chose the same path from R520 to all other future products but Nvidia definitely have lead over the competition as it complete generation weather we are talking about PCIe or AGP cards. ATI bridge chip is still not ready but it should be toward the middle of Q1 2005.