NVIDIA GeForce 840M vs NVIDIA GeForce 805A

VS

NVIDIA GeForce 840M

NVIDIA GeForce 805A

We compared two Mobile platform GPUs: 2GB VRAM GeForce 840M and 1024MB VRAM GeForce 805A to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 840M 's Advantages

Boost Clock has increased by 48% (1124MHz vs 758MHz)

More VRAM (2GB vs 1024GB)

192 additional rendering cores

NVIDIA GeForce 805A 's Advantages

Lower TDP (15W vs 33W)

Score

Benchmark

FP32 (float)

GeForce 840M +196%

0.863 TFLOPS

GeForce 805A

0.291 TFLOPS

GeForce 840M

VS

GeForce 805A

Graphics Card

Mar 2014

Release Date

Jul 2014

GeForce 800M

Generation

GeForce 800A

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x8

Clock Speeds

1029 MHz

Base Clock

719 MHz

1124 MHz

Boost Clock

758 MHz

1001 MHz

Memory Clock

1001 MHz

Memory

2GB

Memory Size

1024MB

DDR3

Memory Type

DDR3

64bit

Memory Bus

64bit

16.02GB/s

Bandwidth

16.02GB/s

Render Config

-

384

Shading Units

192

16

TMUs

16

8

ROPs

8

-

64 KB (per SMM)

L1 Cache

16 KB (per SMX)

1024 KB

L2 Cache

512 KB

-

Theoretical Performance

8.992 GPixel/s

Pixel Rate

6.064 GPixel/s

17.98 GTexel/s

Texture Rate

12.13 GTexel/s

-

863.2 GFLOPS

FP32 (float)

291.1 GFLOPS

26.98 GFLOPS

FP64 (double)

12.13 GFLOPS

Board Design

33W

TDP

15W

-

No outputs

Outputs

No outputs

-

Graphics Processor

GM108

GPU Name

GK208

N15S-GT

GPU Variant

-

Maxwell

Architecture

Kepler 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

Unknown

Transistors

1.02 billion

Unknown

Die Size

87 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

3.5

5.1

Shader Model

5.1

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