hello,this is my first post on tomshardware and thanks for reading and helping me out. so basicaly i own a dell vostro 470 http://www.dell.com/us/business/p/vostro-470/pd (i got it really cheap) and i want to upgrade gpu.Besides power supply will i need to do any changes to my pc? will the case fit gtx 680 if not what can it fit? and can you recommend good psu? thanks for reading again.
More aboutwant upgrade
You need new psu.Consider corsair or seasonic 600w psu.get gtx 670 as the 680 is just 5% faster than 670 and $100 price gap.so i suggest to get gtx 670.
a good 600w psu should be enough. check out seasonic or corsair or antec (among others)
as for the case, im sorry but i am not too sure. 680's are usually long. so choose your 680 and google for card dimensions