NVIDIA Announces GeForce GTX 680MX and GTX 675MX With The New iMac

Published: Oct 24th 2012, 08:24 GMT

NVIDIA Announces GeForce GTX 680MX and GTX 675MX With The New iMac
NVIDIA has quietly launched its new GeForce GTX 600 Series mobile graphics cards based on Kepler architecture. Previously announced GeForce GTX 680M has been dethroned by new MX model.

The new GeForce GTX 680MX and GTX 675MX are equipped with more CUDA cores than their M variants. GeForce GTX 680MX is now considered the fastest mobile GPU, since it has full 1536 CUDA cores known from desktop GTX 680 with Kepler GK104. Also the GTX 675MX and GTX670MX have two-and-half times more cores than GTX 670M — 960.

Both GPUs feature higher memory clocks, while retaining the original configuration. GeForce GTX 680MX and GTX675MX support GDDR5 memory across 256-bit interface, while the GTX 670MX is crippled to 192-bit (same as GTX670M). Interestingly the new GTX675MX is operating only with PCI-Express 2.0 bus (only GTX680xx models have PCI-E 3.0 support).

NVIDIA has announced that these two processors will be installed with the new 27-inch iMacs.

The new 27-inch iMac offers the GeForce GTX 660M as its base GPU, with even faster GeForce GTX 675MX or GeForce GTX 680MX GPUs available. The 21.5-inch model comes with the GeForce GT 640M GPU, with an available upgrade to the GeForce GT 650M GPU.

The new 27-inch iMac with GTX675MX and GTX680MX will be available in December, starting from $1799.

GeForce Mobile GPUs GTX 680MXGTX 680MGTX 675MXGTX 675MGTX 670MXGTX 670M
CUDA Cores15361344960384960336
GPU Clock720 MHz720 MHz600 MHz620 MHz600 MHz598 MHz
Memory Clock2500 MHz1800 MHz1800 MHz1500 MHz1400 MHz1500 MHz
Memory InterfaceGDDR5 256-bitGDDR5 256-bitGDDR5 256-bitGDDR5 256-bitGDDR5 192-bitGDDR5 192-bit
Memory Bandwidth160.0 GB/s115.2 GB/s115.2 GB/s96.0 GB/s67.2 GB/s72.0 GB/s
Texture Fillrate92.2 (billion/s)80.6 (billion/s)48.0 (billion/s)39.7 (billion/s)48.0 (billion/s)33.5 (billion/s)

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