The images in
www.newegg.com show that Gigabyte 6450 video card model GV-R645OC-1GI have only one low-profile bracket for HDMI and DVI port. It seems that this model did not have two brackets as other brands(one for tranditional VGA port and one for HDMI and DVI). I hope I am wrong.
By the way, Gigabyte is my favorite brand of motherboards and video cards, even I should pay more for them. Not for overclocking, just for the stability.