NVIDIA GeForce GTX 680M vs NVIDIA GeForce 840M

VS

NVIDIA GeForce GTX 680M NVIDIA GeForce 840M

We compared two Mobile platform GPUs: 4GB VRAM GeForce GTX 680M and 2GB VRAM GeForce 840M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 680M 's Advantages

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (115.2GB/s vs 16.02GB/s)

960 additional rendering cores

NVIDIA GeForce 840M 's Advantages

Released 1 years and 9 months late

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

Lower TDP (33W vs 100W)

Score

Benchmark

FP32 (float)

GeForce GTX 680M +136%

2.038 TFLOPS

GeForce 840M

0.863 TFLOPS

Blender

GeForce GTX 680M +182%

189

GeForce 840M

67

GeForce GTX 680M

VS

GeForce 840M

Graphics Card

Jun 2012

Release Date

Mar 2014

GeForce 600M

Generation

GeForce 800M

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 3.0 x8

Clock Speeds

719 MHz

Base Clock

1029 MHz

758 MHz

Boost Clock

1124 MHz

900 MHz

Memory Clock

1001 MHz

Memory

4GB

Memory Size

2GB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

64bit

115.2GB/s

Bandwidth

16.02GB/s

Render Config

-

SM Count

-

Compute Units

-

1344

Shading Units

384

112

TMUs

16

32

ROPs

8

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

64 KB (per SMM)

512 KB

L2 Cache

1024 KB

Theoretical Performance

21.22 GPixel/s

Pixel Rate

8.992 GPixel/s

84.90 GTexel/s

Texture Rate

17.98 GTexel/s

-

FP16 (half)

-

2.038 TFLOPS

FP32 (float)

863.2 GFLOPS

84.90 GFLOPS

FP64 (double)

26.98 GFLOPS

Graphics Processor

GK104

GPU Name

GM108

N13E-GTX-A2

GPU Variant

N15S-GT

Kepler

Architecture

Maxwell

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

3.54 billion

Transistors

Unknown

294 mm²

Die Size

Unknown

Board Design

100W

TDP

33W

-

Suggested PSU

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.3

3.0

CUDA

5.0

5.1

Shader Model

5.1

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