NVIDIA GeForce 840M vs NVIDIA GeForce GT 745M

Table of Contents

Graphics Processor

GPU model GM108 GK107
GPU variant N15S-GT N14P-LP
Architecture Maxwell Kepler
Foundry TSMC TSMC
Manufacturing process 28 nm 28 nm
Number of transistors unknown 1,270 million
Die size unknown 118 mm²

Mobile graphics

Release date Mar 12th, 2014 Apr 1st, 2013
Generation GeForce 800M GeForce 700M
Production End-of-life End-of-life
Interface PCIe 3.0 x8 PCIe 3.0 x16
Predecessor GeForce 700M GeForce 600M
Successor GeForce 900M GeForce 800M

Clocks

Base clock 1029 MHz
Boost clock 1124 MHz
Memory clock 1001 MHz 2 Gbps effective 900 MHz 1800 Mbps effective
GPU clock 837 MHz

Memory Configuration

Memory size 2 GB 2 GB
Memory type DDR3 DDR3
Memory bus width 64 bit 128 bit
Bandwidth 16.02 GB/s 28.80 GB/s

Render Configuration

Shading units 384 384
TMUs 16 32
ROPs 8 16
SMM count 3
Cache L1 64 KB (per SMM) 16 KB (per SMX)
Cache L2 1024 KB 256 KB
SMX count 2

Performance

Pixel rate 8.992 GPixel/s 6.696 GPixel/s
Texture rate 17.98 GTexel/s 26.78 GTexel/s
FP32 (float) performance 863.2 GFLOPS 642.8 GFLOPS
FP64 (double) performance 26.98 GFLOPS (1:32) 26.78 GFLOPS (1:24)

Dimensions & Outputs

Slot width IGP IGP
TDP 33 W 45 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 3.0
Shader model 5.1 5.1

Other Features

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