ATI Mobility Radeon HD 3870 vs NVIDIA GeForce 840A

VS

ATI Mobility Radeon HD 3870

NVIDIA GeForce 840A

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

Main Differences

ATI Mobility Radeon HD 3870 's Advantages

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

NVIDIA GeForce 840A 's Advantages

Released 5 years and 9 months late

Boost Clock1124MHz

More VRAM (2GB vs 512GB)

64 additional rendering cores

Lower TDP (33W vs 55W)

Score

Benchmark

FP32 (float)

Mobility Radeon HD 3870

0.422 TFLOPS

GeForce 840A +104%

0.863 TFLOPS

Mobility Radeon HD 3870

VS

GeForce 840A

Graphics Card

Jun 2008

Release Date

Mar 2014

M8x

Generation

GeForce 800A

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x8

Clock Speeds

-

Base Clock

1029 MHz

-

Boost Clock

1124 MHz

850 MHz

Memory Clock

1001 MHz

Memory

512MB

Memory Size

2GB

GDDR3

Memory Type

DDR3

256bit

Memory Bus

64bit

54.40GB/s

Bandwidth

16.02GB/s

Render Config

4

Compute Units

-

320

Shading Units

384

16

TMUs

16

ROPs

8

-

L1 Cache

64 KB (per SMM)

256 KB

L2 Cache

1024 KB

-

Theoretical Performance

10.56 GPixel/s

Pixel Rate

8.992 GPixel/s

10.56 GTexel/s

Texture Rate

17.98 GTexel/s

-

422.4 GFLOPS

FP32 (float)

863.2 GFLOPS

84.48 GFLOPS

FP64 (double)

26.98 GFLOPS

Board Design

55W

TDP

33W

-

No outputs

Outputs

No outputs

-

Graphics Processor

M88

GPU Name

GM108

-

TeraScale

Architecture

Maxwell

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.666 billion

Transistors

Unknown

192 mm²

Die Size

Unknown

Graphics Features

10.1 (10_1)

DirectX

12 (11_0)

3.3

OpenGL

4.6

N/A

OpenCL

3.0

N/A

Vulkan

1.3

-

CUDA

5.0

4.1

Shader Model

5.1

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