NVIDIA GeForce 840M vs AMD Radeon HD 6670A

VS

NVIDIA GeForce 840M

AMD Radeon HD 6670A

We compared two Mobile platform GPUs: 2GB VRAM GeForce 840M and 1024MB VRAM Radeon HD 6670A to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 840M 's Advantages

Released 2 years and 11 months late

Boost Clock1124MHz

More VRAM (2GB vs 1024GB)

Lower TDP (33W vs 45W)

AMD Radeon HD 6670A 's Advantages

Larger VRAM bandwidth (64.00GB/s vs 16.02GB/s)

96 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 840M +49%

0.863 TFLOPS

Radeon HD 6670A

0.576 TFLOPS

GeForce 840M

VS

Radeon HD 6670A

Graphics Card

Mar 2014

Release Date

Apr 2011

GeForce 800M

Generation

All-In-One

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

MXM-A (3.0)

Clock Speeds

1029 MHz

Base Clock

-

1124 MHz

Boost Clock

-

1001 MHz

Memory Clock

1000 MHz

Memory

2GB

Memory Size

1024MB

DDR3

Memory Type

GDDR5

64bit

Memory Bus

128bit

16.02GB/s

Bandwidth

64.00GB/s

Render Config

-

Compute Units

6

-

384

Shading Units

480

16

TMUs

24

8

ROPs

8

-

64 KB (per SMM)

L1 Cache

8 KB (per CU)

1024 KB

L2 Cache

256 KB

-

Theoretical Performance

8.992 GPixel/s

Pixel Rate

4.800 GPixel/s

17.98 GTexel/s

Texture Rate

14.40 GTexel/s

-

863.2 GFLOPS

FP32 (float)

576.0 GFLOPS

26.98 GFLOPS

FP64 (double)

-

Board Design

33W

TDP

45W

-

No outputs

Outputs

No outputs

-

Graphics Processor

GM108

GPU Name

Turks

N15S-GT

GPU Variant

Turks XT (215-0803000)

Maxwell

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

Unknown

Transistors

0.716 billion

Unknown

Die Size

118 mm²

Graphics Features

12 (11_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

3.0

OpenCL

1.2

1.3

Vulkan

N/A

5.0

CUDA

-

5.1

Shader Model

5.0

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