Will i see much difference in performance?
http://www.overclockers.co.uk/showproduct.php?prodid=GX-089-PC&groupid=701&catid=56&subcat=939&name=Powercolor%20ATI%20Radeon%20HD%204850%20512MB%20GDDR3%20TV-Out/Dual%20DVI/HDMI%20(PCI-Express)%20-%20Retail
VS
http://www.overclockers.co.uk/showproduct.php?prodid=GX-071-GW&groupid=701&catid=56&subcat=939&name=Gainward%20ATI%20Radeon%20HD%204870%20512MB%20GDDR5%20TV-Out/Dual%20DVI/HDMI%20(PCI-Express)%20-%20Retail
http://www.overclockers.co.uk/showproduct.php?prodid=GX-089-PC&groupid=701&catid=56&subcat=939&name=Powercolor%20ATI%20Radeon%20HD%204850%20512MB%20GDDR3%20TV-Out/Dual%20DVI/HDMI%20(PCI-Express)%20-%20Retail
VS
http://www.overclockers.co.uk/showproduct.php?prodid=GX-071-GW&groupid=701&catid=56&subcat=939&name=Gainward%20ATI%20Radeon%20HD%204870%20512MB%20GDDR5%20TV-Out/Dual%20DVI/HDMI%20(PCI-Express)%20-%20Retail