SAPPHIRE RADEON HD 4850 X2 REVIEW AT ULTIMATE HARDWARE - "Sapphire Radeon HD 4850 X2 review which also features the Gainward Radeon HD 4870. The Sapphire Radeon HD 4850 X2 has 18% lower clock speed, 45% lower memory speed and is 18% more expensive than the Gainward Radeon HD 4870. The Sapphire Radeon HD 4850 X2 is the little brother of the more powerful ATI Radeon HD 4870 X2."

MSI RADEON HD 4670 REVIEW AT ULTIMATE HARDWARE - "MSI Radeon HD 4670 review which also features the Sapphire Radeon HD 3870. The MSI Radeon HD 4670 has 3% lower clock speed and 13% lower memory speed than the Sapphire Radeon HD 3870. However the MSI Radeon HD 4670 does have 320 Pixel Shaders which is the same as the Sapphire Radeon HD 3870."

SAPPHIRE RADEON HD 4830 REVIEW AT ULTIMATE HARDWARE - "Sapphire Radeon HD 4830 review which also features the MSI GeForce 9800 GT. The Sapphire Radeon HD 4830 has 13% lower clock speed and 6% lower memory speed than the MSI GeForce 9800 GT. However the Sapphire Radeon HD 4830 does has advantages over the MSI GeForce 9800 GT such as DirectX 10.1 and 528 extra Pixel Shaders."

POV GEFORCE GTX 260 REVIEW AT ULTIMATE HARDWARE - "Pov GeForce GTX 260 review also featuring the Gainward Radeon HD 4870. The Pov GeForce GTX 260 has a 25% lower clock speed than the Gainward Radeon HD 4870 and 45% lower memory speed. Another disadvantage the Pov GeForce GTX 260 has is that the Gainward Radeon HD 4870 has 73% more Pixel Shaders. However it's not all bad news for the Pov GeForce GTX 260 and it has 43% more memory than the Gainward Radeon HD 4870."

XFX GEFORCE 9600 GSO REVIEW AT ULTIMATE HARDWARE - "XFX GeForce 9600 GSO also featuring MSI Radeon HD 3850 OC. The XFX GeForce 9600 GSO has a 16% lower clock speed, 8% higher memory speed and 224 less pixel shaders compared to the MSI Radeon HD 3850 OC."