Sapphire Radeon HD 4870 X2 review which also features the Sapphire Radeon HD 4850 X2. The Sapphire Radeon HD 4870 X2 has 17% higher clock speed and 45% higher memory speed than the Sapphire Radeon HD 4850 X2. The Sapphire Radeon HD 4870 X2 uses advanced GDDR5 memory while the Sapphire Radeon HD 4850 X2 uses the older GDDR3 memory.



Link: UltimateHardware