You can unlock almost any of the 400 series and up geforce cards gpu acceleration in Premiere Pro. I have a 450 GTS unlocked for adobe and it makes a fantastic difference. All you need to do is edit the file in named cuda_supported_cards.txt in the PP main folder, and add your cards profile name to the list.
Like so,,
GeForce GTX 285
GeForce GTS 450
GeForce GTX 470
GeForce GTX 570
GeForce GTX 580
Quadro CX
Quadro FX 3700M
” As soon as I think of something good, I will quote myself.”
Titus