Nvidia has acted rapidly to remove references to its unannounced GeForce 300M-series GPUs after they were spotted on the company's own driver download site.

A list of drivers that included the GeForce GTS 360M, GT 335M, GT 330M, 310M and 305M was spotted by a contributor to Notebook Review's forum.

The 300M line is Nvidia's next-generation GPU family and its entry into DirectX 11 gaming. Arch-rival GPU maker AMD has already released four DX11 graphics chips: the high-end Radeon HD 5870 and 5850, and the mid-range 5770 and 5750.

The architecture on which Nvidia's answers to these chips, called 'Fermi', was announced in October 2009. The technology is based on a highly parallel 32-core Stream processor, up to 16 of which can be combined into a single GPU die.

A 16-Stream chip, also called Fermi, is expected to target high performance computing applications, but the same design approach will be used in future gaming GPUs, for which Nvidia has now provided the names. ®