NVIDIA GeForce GTX 850M vs NVIDIA GeForce 820A

VS

NVIDIA GeForce GTX 850M

NVIDIA GeForce 820A

We compared two Mobile platform GPUs: 2GB VRAM GeForce GTX 850M and 1024MB VRAM GeForce 820A to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 850M 's Advantages

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (32.03GB/s vs 14.40GB/s)

544 additional rendering cores

NVIDIA GeForce 820A 's Advantages

Lower TDP (15W vs 45W)

Score

Benchmark

FP32 (float)

GeForce GTX 850M +287%

1.155 TFLOPS

GeForce 820A

0.298 TFLOPS

GeForce GTX 850M

VS

GeForce 820A

Graphics Card

Mar 2014

Release Date

Mar 2014

GeForce 800M

Generation

GeForce 800A

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1001 MHz

Memory Clock

900 MHz

Memory

2GB

Memory Size

1024MB

DDR3

Memory Type

DDR3

128bit

Memory Bus

64bit

32.03GB/s

Bandwidth

14.40GB/s

Render Config

-

SM Count

2

640

Shading Units

96

40

TMUs

16

ROPs

8

-

64 KB (per SMM)

L1 Cache

64 KB (per SM)

2 MB

L2 Cache

128 KB

-

Theoretical Performance

14.43 GPixel/s

Pixel Rate

3.100 GPixel/s

36.08 GTexel/s

Texture Rate

12.40 GTexel/s

-

1155 GFLOPS

FP32 (float)

297.6 GFLOPS

36.08 GFLOPS

FP64 (double)

24.80 GFLOPS

Board Design

45W

TDP

15W

-

No outputs

Outputs

No outputs

-

Graphics Processor

GM107

GPU Name

GF117

N15P-GT-A1

GPU Variant

N15V-GM

Maxwell

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.87 billion

Transistors

0.585 billion

148 mm²

Die Size

116 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

1.1

1.3

Vulkan

N/A

5.0

CUDA

2.1

5.1

Shader Model

5.1

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