I have a Radeon 9250 series graphic card (256 memory) installed on this Ubuntu. Well when i check sysinfo it is only showing 128 memory for the graphics card. Because it is saying it is Radeon 9200 . Im wondering why is it doing this? I know for sure that it is 9250 series graphics card because it says it on the chip.

Sysinfo is showing:
Advanced Micro Devices, INC.[AMD/ATI] RV280 [RADEON 9200 pro] (rev01)(prog-if 00 [VGA controller])
Subsystem: Advanced Micro Devices, INC. [AMD/ATI] Device 2002