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The GeForce 840M was a mobile graphics chip by NVIDIA, launched on March 12th, 2014. Built on the 28 nm process, and based on the GM108S graphics processor, in its N15S-GT-S-A2 variant, the chip supports DirectX 12. Even though it supports DirectX 12, the feature level is only 11_0, which can be problematic with newer DirectX 12 titles. The GM108S graphics processor is a relatively small chip with a die area of only 77 mm2 and 1,020 million transistors. It features 384 shading units, 16 texture mapping units, and 8 ROPs. NVIDIA has paired 2,048 MB DDR3 memory with the GeForce 840M, which are connected using a 64-bit memory interface. The GPU is operating at a frequency of 1029 MHz, which can be boosted up to 1124 MHz, memory is running at 1001 MHz.

Its power draw is rated at 33 W maximum. This device has no display connectivity, as it is not designed to have monitors connected to it. Rather it is intended for use in laptop/notebooks and will use the output of the host mobile device. GeForce 840M is connected to the rest of the system using a PCI-Express 3.0 x8 interface.

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