Radeon HD 6770 Sapphire
Sapphire has tweaked the specs a little. Not particularly dramatically though – the 850MHz core clock goes up to 860MHz, while the memory clock of 1200MHz (4800MHz DDR effective from 1GB of GDDR5 RAM) remains the same. The Sapphire Radeon HD 6770 is still limited by a 128-bit interface, while the chips share the same number of texture units and stream processors. Given the similarities, it’s not surprising that there’s little difference in speed either. Indeed, it’s notable when there’s as much as 3fps between them. In Heaven, the Sapphire Radeon HD 6770 produced 26.4fps (1280x800) and 19.2fps (1680x1050). That compares with 25.7fps and 18.7fps for the 5770 – no more than 0.7fps apart. In Crysis, the figures of 28.6 and 19.3fps for the Sapphire Radeon HD 6770 compare with 26.8 and 17.7fps for the 5770. This time round the lead is as high as 1.8fps. For Stalker, the gap went up 2.4fps at 1680x1050.
Sapphire has tweaked the specs a little. Not particularly dramatically though – the 850MHz core clock goes up to 860MHz, while the memory clock of 1200MHz (4800MHz DDR effective from 1GB of GDDR5 RAM) remains the same. The Sapphire Radeon HD 6770 is still limited by a 128-bit interface, while the chips share the same number of texture units and stream processors. Given the similarities, it’s not surprising that there’s little difference in speed either. Indeed, it’s notable when there’s as much as 3fps between them. In Heaven, the Sapphire Radeon HD 6770 produced 26.4fps (1280x800) and 19.2fps (1680x1050). That compares with 25.7fps and 18.7fps for the 5770 – no more than 0.7fps apart. In Crysis, the figures of 28.6 and 19.3fps for the Sapphire Radeon HD 6770 compare with 26.8 and 17.7fps for the 5770. This time round the lead is as high as 1.8fps. For Stalker, the gap went up 2.4fps at 1680x1050.