NVIDIA GeForce 840A vs NVIDIA GeForce GTX 680MX Mac Edition

VS

NVIDIA GeForce 840A

NVIDIA GeForce GTX 680MX Mac Edition

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

Main Differences

NVIDIA GeForce 840A 's Advantages

Released 1 years and 5 months late

Boost Clock1124MHz

Lower TDP (33W vs 122W)

NVIDIA GeForce GTX 680MX Mac Edition 's Advantages

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 680MX Mac Edition +155%

2.209 TFLOPS

GeForce 840A

VS

GeForce GTX 680MX Mac Edition

Graphics Card

Mar 2014

Release Date

Oct 2012

GeForce 800A

Generation

GeForce 600M

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

1250 MHz

Memory

2GB

Memory Size

2GB

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

23.01 GPixel/s

17.98 GTexel/s

Texture Rate

92.03 GTexel/s

-

863.2 GFLOPS

FP32 (float)

2.209 TFLOPS

26.98 GFLOPS

FP64 (double)

92.03 GFLOPS

Board Design

33W

TDP

122W

-

No outputs

Outputs

No outputs

-

Graphics Processor

GM108

GPU Name

GK104

-

GPU Variant

N13E-GTX2-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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