Sapphire Radeon HD 4770 review which also features the Sapphire Radeon HD 3870. The Sapphire Radeon HD 4770 has 4% lower clock speed, 30% higher memory speed and an extra 320 Pixel Shaders compared to the Sapphire Radeon HD 3870. The Sapphire Radeon HD 4770 does have a disadvantage with the 128 Bit memory interface due to the Sapphire Radeon HD 3870 having a 256 Bit interface. How will this effect performance?

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