NVIDIA GeForce 840A vs NVIDIA GeForce 940M

Table of Contents

Graphics Processor

GPU model GM108 GM107
Architecture Maxwell Maxwell
Foundry TSMC TSMC
Manufacturing process 28 nm 28 nm
Number of transistors unknown 1,870 million
Die size unknown 148 mm²
GPU variant N16S-GT1-KB-B

Mobile graphics

Release date Mar 17th, 2014 Mar 13th, 2015
Generation GeForce 800A GeForce 900M
Production End-of-life End-of-life
Interface PCIe 3.0 x8 MXM-B (3.0)
Predecessor GeForce 700A GeForce 800M
Successor GeForce 900A GeForce 10 Mobile

Clocks

Base clock 1029 MHz 1020 MHz
Boost clock 1124 MHz 1098 MHz
Memory clock 1001 MHz 2 Gbps effective 900 MHz 1800 Mbps effective

Memory Configuration

Memory size 2 GB 2 GB
Memory type DDR3 DDR3
Memory bus width 64 bit 64 bit
Bandwidth 16.02 GB/s 14.40 GB/s

Render Configuration

Shading units 384 512
TMUs 16 32
ROPs 8 16
SMM count 3 4
Cache L1 64 KB (per SMM) 64 KB (per SMM)
Cache L2 1024 KB 2 MB

Performance

Pixel rate 8.992 GPixel/s 17.57 GPixel/s
Texture rate 17.98 GTexel/s 35.14 GTexel/s
FP32 (float) performance 863.2 GFLOPS 1,124 GFLOPS
FP64 (double) performance 26.98 GFLOPS (1:32) 35.14 GFLOPS (1:32)

Dimensions & Outputs

Slot width IGP MXM Module
TDP 33 W 75 W
Outputs No outputs No outputs

API Support & Features

DirectX 12 (11_0) 12 (11_0)
OpenGL 4.6 4.6
OpenCL 3.0 3.0
Vulkan 1.1 1.1
CUDA 5.0 5.0
Shader model 5.1 5.1

Other Features

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