Can anyone explain to me the difference between these two models?
Sapphire 6950 2gb - $274
http://www.amazon.com/Sapphire-DL-DVI-I-SL-DVI-D-PCI-Express-100312SR/dp/B004FPYJFI/ref=sr_1_1?ie=UTF8&qid=1303237924&sr=8-1
Sapphire 6950 2gb - $299
http://www.amazon.com/Sapphire-DL-DVI-I-SL-DVI-D-PCI-Express-100312-2SR/dp/B004TA6RY0/ref=sr_1_2?ie=UTF8&qid=1303237924&sr=8-2
Sapphire 6950 2gb - $274
http://www.amazon.com/Sapphire-DL-DVI-I-SL-DVI-D-PCI-Express-100312SR/dp/B004FPYJFI/ref=sr_1_1?ie=UTF8&qid=1303237924&sr=8-1
Sapphire 6950 2gb - $299
http://www.amazon.com/Sapphire-DL-DVI-I-SL-DVI-D-PCI-Express-100312-2SR/dp/B004TA6RY0/ref=sr_1_2?ie=UTF8&qid=1303237924&sr=8-2