i believe that card is too ancient, which is the reaosn why it's not recognized, it's better if you update your gear with soemthign fresha nd new like the rx 570 or 580, they don't cost too much, there is also the 560 which is even cheaper
Like @Lauren Smith said that card should still be detected and used fully by the miner. Even my R5 gpu cores in an APU get detected and fully utilized. You really shouldnt need a 470/480 (or newer) to do this. Even 7970's work pretty good and you can find them used for $65-80. However, if youre going to get 570s or 580's Best Buy still has some in stock and B&H are getting their stock in next week.