NVIDIA GeForce 8400M GT vs NVIDIA GeForce GT 620M

Table of Contents

Graphics Processor

GPU model G86 GF108
GPU variant G86-603-A2 N13P-GLP-A1
Architecture Tesla Fermi
Foundry TSMC TSMC
Manufacturing process 80 nm 40 nm
Number of transistors 210 million 585 million
Die size 127 mm² 116 mm²

Mobile graphics

Release date May 9th, 2007 Aug 23rd, 2012
Generation GeForce 8M (8000M) GeForce 600M
Production End-of-life End-of-life
Interface PCIe 1.0 x16 PCIe 2.0 x16
Predecessor GeForce Go 7 GeForce 500M
Successor GeForce 9M GeForce 700M

Clocks

GPU clock 450 MHz 660 MHz
Shader clock 900 MHz 1320 MHz
Memory clock 600 MHz 1200 Mbps effective 900 MHz 1800 Mbps effective

Memory Configuration

Memory size 512 MB 1024 MB
Memory type GDDR3 DDR3
Memory bus width 128 bit 128 bit
Bandwidth 19.20 GB/s 28.80 GB/s

Render Configuration

Shading units 16 96
TMUs 8 16
ROPs 4 4
SM count 2 2
Cache L2 32 KB 256 KB
Cache L1 64 KB (per SM)

Performance

Pixel rate 1.800 GPixel/s 2.640 GPixel/s
Texture rate 3.600 GTexel/s 10.56 GTexel/s
FP32 (float) performance 28.80 GFLOPS 253.4 GFLOPS
FP64 (double) performance 21.12 GFLOPS (1:12)

Dimensions & Outputs

TDP 14 W 15 W
Outputs No outputs No outputs

API Support & Features

DirectX 11.1 (10_0) 12 (11_0)
OpenGL 3.3 4.6
OpenCL 1.1 1.1
Vulkan
CUDA 1.1 2.1
Shader model 4.0 5.1

Other Features

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