What's this, a bit of intrigue from NVIDIA? The company is due for a refresh on its DirectX 11 line and, with AMD's Cayman series floating its way to availability on crystal-clear waters, the competition appears to be teasing its response. NVIDIA briefly listed a card called the GTX 580 on its System Requirements page and, while we don't know how long it was there, it was quickly pulled after news of its presence started making the rounds. Accidental addition or the intentional
