NVIDIA GeForce 840A vs NVIDIA GeForce GTX 780M

VS

NVIDIA GeForce 840A

NVIDIA GeForce GTX 780M

We compared two Mobile platform GPUs: 2GB VRAM GeForce 840A and 4GB VRAM GeForce GTX 780M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 840A 's Advantages

Released 10 months late

Boost Clock has increased by 41% (1124MHz vs 797MHz)

Lower TDP (33W vs 122W)

NVIDIA GeForce GTX 780M 's Advantages

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (160.0GB/s vs 16.02GB/s)

1152 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 840A

0.863 TFLOPS

GeForce GTX 780M +183%

2.448 TFLOPS

GeForce 840A

VS

GeForce GTX 780M

Graphics Card

Mar 2014

Release Date

May 2013

GeForce 800A

Generation

GeForce 700M

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

MXM-B (3.0)

Clock Speeds

1029 MHz

Base Clock

771 MHz

1124 MHz

Boost Clock

797 MHz

1001 MHz

Memory Clock

1250 MHz

Memory

2GB

Memory Size

4GB

DDR3

Memory Type

GDDR5

64bit

Memory Bus

256bit

16.02GB/s

Bandwidth

160.0GB/s

Render Config

-

384

Shading Units

1536

16

TMUs

128

8

ROPs

32

-

64 KB (per SMM)

L1 Cache

16 KB (per SMX)

1024 KB

L2 Cache

512 KB

-

Theoretical Performance

8.992 GPixel/s

Pixel Rate

25.50 GPixel/s

17.98 GTexel/s

Texture Rate

102.0 GTexel/s

-

863.2 GFLOPS

FP32 (float)

2.448 TFLOPS

26.98 GFLOPS

FP64 (double)

102.0 GFLOPS

Board Design

33W

TDP

122W

-

No outputs

Outputs

No outputs

-

Power Connectors

None

Graphics Processor

GM108

GPU Name

GK104

-

GPU Variant

N14E-GTX-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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