AMD Radeon HD 6950M vs ATI Mobility Radeon HD 3870 X2

VS

AMD Radeon HD 6950M

ATI Mobility Radeon HD 3870 X2

We compared two Mobile platform GPUs: 1024MB VRAM Radeon HD 6950M 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

AMD Radeon HD 6950M 's Advantages

Released 2 years and 4 months late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (115.2GB/s vs 54.40GB/s)

640 additional rendering cores

Lower TDP (50W vs 110W)

Score

Benchmark

FP32 (float)

Radeon HD 6950M +163%

1.114 TFLOPS

Mobility Radeon HD 3870 X2

0.422 TFLOPS

Radeon HD 6950M

VS

Mobility Radeon HD 3870 X2

Graphics Card

Jan 2011

Release Date

Sep 2008

Vancouver

Generation

M8x

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

900 MHz

Memory Clock

850 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

256bit

115.2GB/s

Bandwidth

54.40GB/s

Render Config

12

Compute Units

4

-

960

Shading Units

320

48

TMUs

16

32

ROPs

16

-

8 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

256 KB

-

Theoretical Performance

18.56 GPixel/s

Pixel Rate

10.56 GPixel/s

27.84 GTexel/s

Texture Rate

10.56 GTexel/s

-

1114 GFLOPS

FP32 (float)

422.4 GFLOPS

-

FP64 (double)

84.48 GFLOPS

Board Design

50W

TDP

110W

-

No outputs

Outputs

No outputs

-

Graphics Processor

Blackcomb

GPU Name

M88

Blackcomb PRO

GPU Variant

-

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

1.7 billion

Transistors

0.666 billion

212 mm²

Die Size

192 mm²

Graphics Features

11.2 (11_0)

DirectX

10.1 (10_1)

4.4

OpenGL

3.3

1.2

OpenCL

N/A

Vulkan

N/A

-

5.0

Shader Model

4.1

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