NVIDIA GeForce 820A vs NVIDIA GeForce GT 635M

Table of Contents

Graphics Processor

GPU model GF117 GF108
GPU variant N15V-GM
Architecture Fermi 2.0 Fermi
Foundry TSMC TSMC
Manufacturing process 28 nm 40 nm
Number of transistors 585 million 585 million
Die size 116 mm² 116 mm²

Mobile graphics

Release date Mar 17th, 2014 Mar 22nd, 2012
Generation GeForce 800A GeForce 600M
Production End-of-life End-of-life
Interface PCIe 2.0 x16 MXM-A (3.0)
Predecessor GeForce 700A GeForce 500M
Successor GeForce 900A GeForce 700M

Clocks

GPU clock 775 MHz 660 MHz
Shader clock 1550 MHz 1320 MHz
Memory clock 900 MHz 1800 Mbps effective 900 MHz 1800 Mbps effective

Memory Configuration

Memory size 1024 MB 1024 MB
Memory type DDR3 DDR3
Memory bus width 64 bit 64 bit
Bandwidth 14.40 GB/s 14.40 GB/s

Render Configuration

Shading units 96 96
TMUs 16 16
ROPs 8 4
SM count 2 2
Cache L1 64 KB (per SM) 64 KB (per SM)
Cache L2 128 KB 128 KB

Performance

Pixel rate 3.100 GPixel/s 2.640 GPixel/s
Texture rate 12.40 GTexel/s 10.56 GTexel/s
FP32 (float) performance 297.6 GFLOPS 253.4 GFLOPS
FP64 (double) performance 24.80 GFLOPS (1:12) 21.12 GFLOPS (1:12)

Dimensions & Outputs

TDP 15 W 33 W
Outputs No outputs No outputs
Slot width MXM Module

API Support & Features

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

Other Features

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