NVIDIA GeForce 840A vs ATI Mobility Radeon HD 3870 X2

VS

NVIDIA GeForce 840A

ATI Mobility Radeon HD 3870 X2

We compared two Mobile platform GPUs: 2GB VRAM GeForce 840A and 512MB VRAM Mobility Radeon HD 3870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 840A 's Advantages

Released 5 years and 6 months late

Boost Clock1124MHz

More VRAM (2GB vs 512GB)

64 additional rendering cores

Lower TDP (33W vs 110W)

ATI Mobility Radeon HD 3870 X2 's Advantages

Larger VRAM bandwidth (54.40GB/s vs 16.02GB/s)

Score

Benchmark

FP32 (float)

GeForce 840A +104%

0.863 TFLOPS

Mobility Radeon HD 3870 X2

0.422 TFLOPS

GeForce 840A

VS

Mobility Radeon HD 3870 X2

Graphics Card

Mar 2014

Release Date

Sep 2008

GeForce 800A

Generation

M8x

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 2.0 x16

Clock Speeds

1029 MHz

Base Clock

-

1124 MHz

Boost Clock

-

1001 MHz

Memory Clock

850 MHz

Memory

2GB

Memory Size

512MB

DDR3

Memory Type

GDDR3

64bit

Memory Bus

256bit

16.02GB/s

Bandwidth

54.40GB/s

Render Config

-

Compute Units

4

-

384

Shading Units

320

16

TMUs

16

8

ROPs

16

-

64 KB (per SMM)

L1 Cache

-

1024 KB

L2 Cache

256 KB

-

Theoretical Performance

8.992 GPixel/s

Pixel Rate

10.56 GPixel/s

17.98 GTexel/s

Texture Rate

10.56 GTexel/s

-

863.2 GFLOPS

FP32 (float)

422.4 GFLOPS

26.98 GFLOPS

FP64 (double)

84.48 GFLOPS

Board Design

33W

TDP

110W

-

No outputs

Outputs

No outputs

-

Graphics Processor

GM108

GPU Name

M88

-

Maxwell

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

Unknown

Transistors

0.666 billion

Unknown

Die Size

192 mm²

Graphics Features

12 (11_0)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

3.0

OpenCL

N/A

1.3

Vulkan

N/A

5.0

CUDA

-

5.1

Shader Model

4.1

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