ATI Mobility Radeon HD 3870 vs AMD Radeon HD 6970M Mac Edition

VS

ATI Mobility Radeon HD 3870 AMD Radeon HD 6970M Mac Edition

We compared two Mobile platform GPUs: 512MB VRAM Mobility Radeon HD 3870 and 2GB VRAM Radeon HD 6970M Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Mobility Radeon HD 3870 's Advantages

Lower TDP (55W vs 75W)

AMD Radeon HD 6970M Mac Edition 's Advantages

Released 3 years and 2 months late

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

640 additional rendering cores

Score

Benchmark

FP32 (float)

Mobility Radeon HD 3870

0.422 TFLOPS

Radeon HD 6970M Mac Edition +209%

1.306 TFLOPS

Mobility Radeon HD 3870

VS

Radeon HD 6970M Mac Edition

Graphics Card

Jun 2008

Release Date

Aug 2011

M8x

Generation

Vancouver

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

MXM-B (3.0)

Clock Speeds

-

Base Clock

-

Boost Clock

-

850 MHz

Memory Clock

900 MHz

Memory

512MB

Memory Size

2GB

GDDR3

Memory Type

GDDR5

256bit

Memory Bus

256bit

54.40GB/s

Bandwidth

115.2GB/s

Render Config

-

SM Count

-

4

Compute Units

12

320

Shading Units

960

16

TMUs

48

16

ROPs

32

-

Tensor Cores

-

RT Cores

-

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

512 KB

Theoretical Performance

10.56 GPixel/s

Pixel Rate

21.76 GPixel/s

10.56 GTexel/s

Texture Rate

32.64 GTexel/s

-

FP16 (half)

-

422.4 GFLOPS

FP32 (float)

1306 GFLOPS

84.48 GFLOPS

FP64 (double)

-

Graphics Processor

M88

GPU Name

Blackcomb

-

GPU Variant

Blackcomb XT (216-0811000)

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.666 billion

Transistors

1.7 billion

192 mm²

Die Size

212 mm²

Board Design

55W

TDP

75W

-

Suggested PSU

-

No outputs

Outputs

No outputs

-

Power Connectors

None

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

-

CUDA

-

4.1

Shader Model

5.0

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