NVIDIA Announces GeForce GTX 680MX and GTX 675MX With The New iMac | VideoCardz.com
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NVIDIA GeForce GTX 680MX in GFXBench - unified graphics benchmark based on DXBenchmark (DirectX) and GLBenchmark (OpenGL ES)
iMac 27" A1419 Late 2012 Logic Board W/Nvidia GTX 680MX 2 GB Video Car - Part Haven