ATI Mobility Radeon HD 3870 vs AMD Radeon HD 6650A

VS

ATI Mobility Radeon HD 3870

AMD Radeon HD 6650A

We compared two Mobile platform GPUs: 512MB VRAM Mobility Radeon HD 3870 and 1024MB VRAM Radeon HD 6650A 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 28.80GB/s)

AMD Radeon HD 6650A 's Advantages

Released 2 years and 10 months late

More VRAM (1024GB vs 512GB)

160 additional rendering cores

Lower TDP (45W vs 55W)

Score

Benchmark

FP32 (float)

Mobility Radeon HD 3870

0.422 TFLOPS

Radeon HD 6650A +36%

0.576 TFLOPS

Mobility Radeon HD 3870

VS

Radeon HD 6650A

Graphics Card

Jun 2008

Release Date

Apr 2011

M8x

Generation

All-In-One

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

MXM-A (3.0)

Clock Speeds

-

850 MHz

Memory Clock

900 MHz

Memory

512MB

Memory Size

1024MB

GDDR3

Memory Type

DDR3

256bit

Memory Bus

128bit

54.40GB/s

Bandwidth

28.80GB/s

Render Config

4

Compute Units

6

-

320

Shading Units

480

16

TMUs

24

16

ROPs

8

-

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

10.56 GPixel/s

Pixel Rate

4.800 GPixel/s

10.56 GTexel/s

Texture Rate

14.40 GTexel/s

-

422.4 GFLOPS

FP32 (float)

576.0 GFLOPS

84.48 GFLOPS

FP64 (double)

-

Board Design

55W

TDP

45W

-

No outputs

Outputs

No outputs

-

Graphics Processor

M88

GPU Name

Onega

-

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.666 billion

Transistors

0.716 billion

192 mm²

Die Size

118 mm²

Graphics Features

10.1 (10_1)

DirectX

11.2 (11_0)

3.3

OpenGL

4.4

N/A

OpenCL

1.2

N/A

Vulkan

N/A

-

4.1

Shader Model

5.0

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