Contrary to the previous rumours that the GeForce GTX 990M mobile graphics would be based on the ridiculously high-end GM200 GPU used in the GTX 980 Ti and Titan X, it turns out Nvidia’s upcoming chip will instead be based on the Maxwell GM204 GPU. It turns out, a little unsurprisingly, that the GM200 runs too hot for user in laptops, forcing the use of the GM204 GPU.
The GM204 is still no slouch however. It’s the same GPU used in the desktop variant of the GeForce GTX 980, so it’s packing some serious punch. The GTX 990M is a full fat mobile variant packing the entire complete of 2048 stream processors, 128 TMUs, 64 ROPs, and 8GB GDDR5 memory, all on a 256-memory interface. The GTX 990M GPU itself is clocked at 1190MHz. [More]