ATI Radeon X12xx & 2100 IGP series chart

model Interface max core clock (MHz) max memory (Mb) max memory clock (Mhz) max Fillrate (MT/s) memory bus type memory bus width (bit)
Radeon 2100  onboard PCIe    1024  system    system (DDR2)  128
Radeon X1200 IGP  onboard PCIe  350  1024  system  1400  system (DDR2)  128
Radeon X1250 IGP  onboard PCIe  400  1024  system  1600  system (DDR2) + local frame buffer  128
Radeon Xpress 1250 IGP  onboard PCIe  500  512  system  2000  system (DDR2)  128
Radeon Xpress 1270 IGP  onboard PCIe  400  1024  system  1600  system (DDR2) + local frame buffer  128