Hi, I just wanted to know what is the difference between these gpus. The only think I can see is the weight changing but the lighter one is more costier. Thanks!1st gpu http://www.amazon.com/EVGA-GeForce-Clocked-Graphic-04G-P4-3962-KR/dp/B00VX1MJQ8?ie=UTF8&psc=1&redirect=true&ref_=ox_sc_act_title_1&smid=ATVPDKIKX0DER 2nd gpu http://www.amazon.com/EVGA-GeForce-04G-P4-1962-KR-GAMING-Inch/dp/B012NOWEY0/ref=cm_cr_arp_d_product_top?ie=UTF8