The GeForce GT 640M Mac Edition was a mobile graphics chip by NVIDIA, launched on February 3rd, 2013. Built on the 28 nm process, and based on the GK107 graphics processor, in its N13P-GS 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 GK107 graphics processor is an average sized chip with a die area of 118 mm² and 1,270 million transistors. It features 384 shading units, 32 texture mapping units, and 8 ROPs. NVIDIA has paired 512 MB GDDR5 memory with the GeForce GT 640M Mac Edition, which are connected using a 64-bit memory interface. The GPU is operating at a frequency of 745 MHz, which can be boosted up to 745 MHz, memory is running at 1250 MHz (5 Gbps effective). Its power draw is rated at 32 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 GT 640M Mac Edition is connected to the rest of the system using a PCI-Express 3.0 x16 interface.