Today Lantic launches its HD 6850 and HD 6870. With the unveiling of AMD Radeon HD 6000 series, we have known that Radeon HD 6850 and 6870 are codenamed “Bart XT” and "Bart pro" from the "Norther Island" series. Basic on the original design, HD 6870 uses 40nm chipset with 1120 built-in stream processors. It equips with a 256-bit 1GB GDDR5 memory, and core/memory clock reached to 930/4200MHz. HD 6850 with 960 built-in stream processors, 1GB GDDR5 memory, and its core clock reach to 775MHz.