NVIDIA GeForce 840A vs NVIDIA GeForce GTX 870M

VS

NVIDIA GeForce 840A

NVIDIA GeForce GTX 870M

We compared two Mobile platform GPUs: 2GB VRAM GeForce 840A and 3GB VRAM GeForce GTX 870M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 840A 's Advantages

Boost Clock has increased by 16% (1124MHz vs 967MHz)

Lower TDP (33W vs 100W)

NVIDIA GeForce GTX 870M 's Advantages

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (120.0GB/s vs 16.02GB/s)

960 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 840A

0.863 TFLOPS

GeForce GTX 870M +201%

2.599 TFLOPS

GeForce 840A

VS

GeForce GTX 870M

Graphics Card

Mar 2014

Release Date

Mar 2014

GeForce 800A

Generation

GeForce 800M

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

MXM-B (3.0)

Clock Speeds

1029 MHz

Base Clock

941 MHz

1124 MHz

Boost Clock

967 MHz

1001 MHz

Memory Clock

1250 MHz

Memory

2GB

Memory Size

3GB

DDR3

Memory Type

GDDR5

64bit

Memory Bus

192bit

16.02GB/s

Bandwidth

120.0GB/s

Render Config

-

384

Shading Units

1344

16

TMUs

112

8

ROPs

24

-

64 KB (per SMM)

L1 Cache

16 KB (per SMX)

1024 KB

L2 Cache

384 KB

-

Theoretical Performance

8.992 GPixel/s

Pixel Rate

27.08 GPixel/s

17.98 GTexel/s

Texture Rate

108.3 GTexel/s

-

863.2 GFLOPS

FP32 (float)

2.599 TFLOPS

26.98 GFLOPS

FP64 (double)

108.3 GFLOPS

Board Design

33W

TDP

100W

-

No outputs

Outputs

No outputs

-

Power Connectors

None

Graphics Processor

GM108

GPU Name

GK104

-

GPU Variant

N15E-GT-A2

Maxwell

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

Unknown

Transistors

3.54 billion

Unknown

Die Size

294 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.3

Vulkan

1.1

5.0

CUDA

3.0

5.1

Shader Model

5.1

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