Asian tech site XFastest published leaked scores of the 3DMark Vantage (Performance preset) and 3DMark06 performance of AMD's upcoming Radeon HD 6850 and Radeon HD 6870 graphics cards.
These preliminary scores reveal the Radeon HD 6870 and Radeon HD 6850 may be somewhat slower than the Radeon HD 5870 and Radeon HD 5850, respectively. This is due to the fact that the Radeon HD 6800 series is based on the Barts GPU, the real successor to the Radeon HD 5800 series will be the Cayman-based Radeon HD 6950 and Radeon HD 6970 cards.
ATI Radeon HD 5870: P17924/19433 AMD Radeon HD 6870: P16270/19480
ATI Radeon HD 5850: P15593/18762 AMD Radeon HD 6850: P14872/18750
ATI Radeon HD 5830: P14014/17298
ATI Radeon HD 5770: P11017/16358
ATI Radeon HD 5750: P9124/14966