AMD Radeon HD 7970M vs ATI Mobility Radeon HD 3870 X2

VS

AMD Radeon HD 7970M ATI Mobility Radeon HD 3870 X2

We compared two Mobile platform GPUs: 2GB VRAM Radeon HD 7970M 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 7970M 's Advantages

Released 3 years and 7 months late

Larger VRAM bandwidth (153.6GB/s vs 54.40GB/s)

960 additional rendering cores

Lower TDP (100W vs 110W)

Score

Benchmark

FP32 (float)

Radeon HD 7970M +415%

2.176 TFLOPS

Mobility Radeon HD 3870 X2

0.422 TFLOPS

Radeon HD 7970M

VS

Mobility Radeon HD 3870 X2

Graphics Card

Apr 2012

Release Date

Sep 2008

London

Generation

M8x

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1200 MHz

Memory Clock

850 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

256bit

153.6GB/s

Bandwidth

54.40GB/s

Render Config

-

SM Count

-

20

Compute Units

4

1280

Shading Units

320

80

TMUs

16

32

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

256 KB

Theoretical Performance

27.20 GPixel/s

Pixel Rate

10.56 GPixel/s

68.00 GTexel/s

Texture Rate

10.56 GTexel/s

-

FP16 (half)

-

2.176 TFLOPS

FP32 (float)

422.4 GFLOPS

136.0 GFLOPS

FP64 (double)

84.48 GFLOPS

Graphics Processor

Wimbledon

GPU Name

M88

Wimbledon XT (216-0836036)

GPU Variant

-

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

2.8 billion

Transistors

0.666 billion

212 mm²

Die Size

192 mm²

Board Design

100W

TDP

110W

-

Suggested PSU

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Features

12 (11_1)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

1.2

OpenCL

N/A

1.2

Vulkan

N/A

-

CUDA

-

5.1

Shader Model

4.1

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