NVIDIA GeForce 840A vs NVIDIA GeForce GTX 850M

VS

NVIDIA GeForce 840A

NVIDIA GeForce GTX 850M

We compared two Mobile platform GPUs: 2GB VRAM GeForce 840A and 2GB VRAM GeForce GTX 850M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 840A 's Advantages

Boost Clock1124MHz

Lower TDP (33W vs 45W)

NVIDIA GeForce GTX 850M 's Advantages

Larger VRAM bandwidth (32.03GB/s vs 16.02GB/s)

256 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 840A

0.863 TFLOPS

GeForce GTX 850M +33%

1.155 TFLOPS

GeForce 840A

VS

GeForce GTX 850M

Graphics Card

Mar 2014

Release Date

Mar 2014

GeForce 800A

Generation

GeForce 800M

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

1029 MHz

Base Clock

-

1124 MHz

Boost Clock

-

1001 MHz

Memory Clock

1001 MHz

Memory

2GB

Memory Size

2GB

DDR3

Memory Type

DDR3

64bit

Memory Bus

128bit

16.02GB/s

Bandwidth

32.03GB/s

Render Config

-

384

Shading Units

640

16

TMUs

40

8

ROPs

16

-

64 KB (per SMM)

L1 Cache

64 KB (per SMM)

1024 KB

L2 Cache

2 MB

-

Theoretical Performance

8.992 GPixel/s

Pixel Rate

14.43 GPixel/s

17.98 GTexel/s

Texture Rate

36.08 GTexel/s

-

863.2 GFLOPS

FP32 (float)

1155 GFLOPS

26.98 GFLOPS

FP64 (double)

36.08 GFLOPS

Board Design

33W

TDP

45W

-

No outputs

Outputs

No outputs

-

Graphics Processor

GM108

GPU Name

GM107

-

GPU Variant

N15P-GT-A1

Maxwell

Architecture

Maxwell

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

Unknown

Transistors

1.87 billion

Unknown

Die Size

148 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.3

Vulkan

1.3

5.0

CUDA

5.0

5.1

Shader Model

5.1

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