NVIDIA has refreshed three previous generation GeForce GT 500 cards that are based on its Fermi GPU. They have been re-christened as GeForce GT 600 cards targeted at budget conscious consumers and OEMs.
According to tabulated specifications by CPU World, the GeForce GT 610, 620, and 630 are slightly tweaked versions of the GT 520, GT 530 and GT 440 respectively. The GeForce GT 630 has two variants, supporting either GDDR5 or DDR3 memory. The former version (GDDR5) features 1024MB of video memory, clocked at 800MHz (with effective rated frequency of 3.2GHz). The DDR3 version of GT 630 also has 1024MB of video memory with a rated frequency of 900MHz (with effective frequency of 1.8GHz). Last of all, there is an OEM GeForce GT 630 that features a Kepler-based GK107 GPU. For more information on the range of cards available from different add-in manufacturers, please check them out here.