Make no mistake — NVIDIA has certainly pushed out a few new powerhouse graphics cards since the introduction of its GTX 260, but there’s obviously plenty of demand left for what was the company’s most impressive GPU to date in June of last year. As money gets tight and cutting edge boards become less of a necessity, NVIDIA’s banking on selling a few more of its older cards at lower prices than before. To that end, we’re hearing that the third generation of the GTX 260 is set to hit store shelves within just