GTX660 (asus vs evga) vs 7870 (asus vs sapphire vs vtx3d)

[Enderegg]

GTX660 ASUS: http://www.amazon.co.uk/gp/product/B0098VKIRC/ref=olp_product_details?ie=UTF8&me=&seller=

EVGA: http://www.amazon.co.uk/gp/product/B0099AOD50/ref=olp_product_details?ie=UTF8&me=&seller=

HD7870 ASUS: http://www.amazon.co.uk/Asus-7870-Radeon-DirectCU-Graphics/dp/B008A1C252/ref=sr_1_1?ie=UTF8&qid=1363953264&sr=8-1

SAPPHIRE: http://www.amazon.co.uk/Sapphire-11199-16-20G-Graphics-Display-Express/dp/B00A1572TQ/ref=sr_1_7?ie=UTF8&qid=1363953264&sr=8-7

VTX3D: http://www.amazon.co.uk/gp/product/B008MWA5AI/ref=ox_sc_sfl_title_1?ie=UTF8&psc=1&smid=A3P5ROKL5A1OLE

Now I'm not sure. Should i go HD7870? Although is just for a couple fps? I read you can overclock the AMD card and outperform a GTX660ti. Is it true? And cooling etc.

And is there any difference between the more expensive and more cheap amd card?

 

[thenay]

Get the sapphire hd 7870 one, it will perform better and it is cheaper