Oh my; it's been a while since we were treated to an (apparent) leak involving a major, upcoming graphics card showing up unannounced in Far Eastern stores. An image of what appears to be an MSI GeForce GTX 670 product box popped up on Engadget this morning. Some digging suggests the shot originates from Chinese site MyDrivers.com, which has a whole series of pictures and additional details. How exciting!
Looking at that gallery, though, a few alarm bells go off in my head. First, there's the obvious misspelling: it says "DispalyPort" on the front of the box instead of "DisplayPort"—something you'd think MSI's copy editors would have caught. The model number for the product seems to be simply, "GTX 670," which is very un-MSI. You see, all of the company's GeForce cards have an "N" at the start of their model number, with the three-letter suffix at the end. If this were an "N670GTX," I'd believe it—but simply "GTX 670"? Hmm. Finally, boxes for other MSI graphics cards usually have a stylized rendition of the product on there somewhere; this one does not.
MyDrivers.com posted pictures of a nondescript-looking card, which has dual six-pin PCI Express power connectors and a long, black cooling shroud, sitting on the box. That's nice, but, well, anything could be hiding under that shroud.
In conclusion, I'd take this latest leak with a generous helping of salt. For what it's worth, MyDrivers.com claims the GeForce GTX 670 features the same GK104 chip as the GTX 680, but with 1344 shader ALUs and the ability to filter 112 texels per clock—down from 1536 and 128, respectively, on the GTX 680. That's at least plausible. You could make a GPU like that by disabling one of the GK104's shader multiprocessors. Whether that's what Nvidia is doing is another question entirely.
Update: The plot thickens. Upon closer inspection, it appears the box design does look an awful lot like the one MSI used for a now-delisted GeForce GTX 680—minus the typo, of course. Might this be the real thing after all?