ATI Radeon R600 (HD 2xxx, HD 3xxx) 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 HD 2350  PCIe x16, AGP  525  256  400  2.1  DDR2  64
Radeon HD 2400 Pro  PCIe x16, AGP  525  256, 512  400  2.1  DDR2  64
Radeon HD 2400 XT  PCIe x16  700  256  800  2.8  GDDR3  64
Radeon HD 2600 PRO  PCIe x16, AGP  600  256, 512  700  2.4  GDDR3  128
Radeon HD 2600 XT  PCIe x16, AGP  800  256, 512  1100 (GDDR4)  3.2  DDR2, GDDR3, GDDR4  128
Radeon HD 2900 GT  PCIe x16  600  256  800  7.2  GDDR3  256
Radeon HD 2900 Pro  PCIe x16  600  512, 1024  800, 1000  9.6  GDDR3, GDDR4  512
Radeon HD 2900 XT  PCIe x16  743  512, 1024  825, 1000  11.888  GDDR3, GDDR4  512
Radeon HD 3100 Graphics (780V IGP)  Onboard PCIe    128, 256 (local frame buffer)  System Memory    System Memory  
Radeon HD 3200 Graphics (780G IGP)  Onboard PCIe  500  128, 256 (local frame buffer)  System Memory  2  System Memory/DDR2/GDDR3  32 (local frame buffer)
Radeon HD 3300 Graphics (790GX IGP)  Onboard PCIe    128, 256 (local frame buffer)  System Memory    System Memory/DDR2/GDDR3  
Radeon HD 3430  PCIe 2.0 x16          DDR2  64
Radeon HD 3450  PCIe 2.0 x16  600  256  500  2.4  DDR2  64
Radeon HD 3470  PCIe 2.0 x16  800  256  950  3.2  DDR2, GDDR3  64
Radeon HD 3650  PCIe 2.0 x16  725  256, 512  800  2.9  DDR2, GDDR3, GDDR4  128
Radeon HD 3690/3830  PCIe 2.0 x16  668  256  828  10.7  GDDR3  128
Radeon HD 3850  PCIe 2.0 x16, AGP 8x  668  256, 512, 1024  828  10.7  GDDR3  256
Radeon HD 3850 X2  PCIe 2.0 x16  2x 668  2x 512  828  2x 10.7  GDDR3  2x 256
Radeon HD 3870  PCIe 2.0 x16  775  512, 1024  1125, 1200  12.4  GDDR3, GDDR4  256
Radeon HD 3870 X2  PCIe 2.0 x16, (internal PCIe 1.1 x16)  2x 825  2x 512, 2x 1024  900, 1126  2x 13.2  GDDR3, GDDR4  2x 256