NVIDIA GeForce 840M, codenamed “N15S-GT”, is a mid-range graphics chip, announced in Q1 of 2014. It is part of the Maxwell generation and relies on a GM108 core, constructed through a 28nm process. It consists of three shader blocks, known as SMM, and each of those has 128 smaller shader cores, also known as CUDA, for a total of 384 CUDA cores. The package also includes 24 texture cores and 8 raster cores.
All of them operate at 1029MHz, but NVIDIA’s GPU Boost 2.0 can increase that frequency based on the laptop’s cooling capacity.
The chip also has a 64bit bus and DDR3 memory. NVIDIA GeForce 840M supports DirectX 11.2, Pixel Shader 5.0, Optimus, SLI, PhysX, OpenCL 1.1, OpenGL 4.4, DirectCompute and CUDA. Memory bandwidth goes up to 15.4GB/sec. Max resolutions (WxH) are 2560×1600 digital and 2048×1536 analog.
NVIDIA GeForce 840M (2GB DDR3) - technical specifications
|Manufacturing Process||28 nm|
|Base frequency||1029 MHz|
|Memory Frequency||2002 MHz|
|Memory bandwith||16 GB/sec|
|Date of release||12 March 2014|
|Power consumption||33 W|
|Maximum frequency||1124 MHz|
|Memory Capacity||2 GB|
|Memory bus||64 bits|
|Supported technologies||DirectX 11.2, Pixel Shader 5.0, Optimus, SLI, PhysX, OpenCL 1.1, OpenGL 4.4, DirectCompute, CUDA.|