How are these are there any differences i was told i could get one with my machine so i want to get the best one
http://www.newegg.com/Product/Product.aspx?Item=N82E16814121633
http://www.amazon.com/ASUS-HD7750-1GD5-V2-Radeon-GDDR5-Graphics/dp/B007RFYEQW/ref=sr_1_1?ie=UTF8&qid=1388699951&sr=8-1&keywords=hd+7750+gddr5
http://www.amazon.com/Gigabyte-GV-R775OC-1GI-Radeon-PCI-Express-Graphic/dp/B0079XWPEK/ref=sr_1_1?ie=UTF8&qid=1388699858&sr=8-1&keywords=gigabyte+hd+7750+gddr5
http://www.newegg.com/Product/Product.aspx?Item=N82E16814121633
http://www.amazon.com/ASUS-HD7750-1GD5-V2-Radeon-GDDR5-Graphics/dp/B007RFYEQW/ref=sr_1_1?ie=UTF8&qid=1388699951&sr=8-1&keywords=hd+7750+gddr5
http://www.amazon.com/Gigabyte-GV-R775OC-1GI-Radeon-PCI-Express-Graphic/dp/B0079XWPEK/ref=sr_1_1?ie=UTF8&qid=1388699858&sr=8-1&keywords=gigabyte+hd+7750+gddr5