ATI Mobility Radeon HD 3870 vs ATI Mobility Radeon HD 2700

VS

ATI Mobility Radeon HD 3870

ATI Mobility Radeon HD 2700

We compared two Mobile platform GPUs: 512MB VRAM Mobility Radeon HD 3870 and 256MB VRAM Mobility Radeon HD 2700 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Mobility Radeon HD 3870 's Advantages

Released 6 months late

More VRAM (512GB vs 256GB)

Larger VRAM bandwidth (54.40GB/s vs 22.40GB/s)

200 additional rendering cores

ATI Mobility Radeon HD 2700 's Advantages

Lower TDP (35W vs 55W)

Score

Benchmark

FP32 (float)

Mobility Radeon HD 3870 +151%

0.422 TFLOPS

Mobility Radeon HD 2700

0.168 TFLOPS

Mobility Radeon HD 3870

VS

Mobility Radeon HD 2700

Graphics Card

Jun 2008

Release Date

Dec 2007

M8x

Generation

M7x

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

MXM-II

Clock Speeds

-

850 MHz

Memory Clock

700 MHz

Memory

512MB

Memory Size

256MB

GDDR3

Memory Type

GDDR3

256bit

Memory Bus

128bit

54.40GB/s

Bandwidth

22.40GB/s

Render Config

4

Compute Units

3

-

320

Shading Units

120

16

TMUs

8

16

ROPs

4

-

256 KB

L2 Cache

64 KB

-

Theoretical Performance

10.56 GPixel/s

Pixel Rate

2.800 GPixel/s

10.56 GTexel/s

Texture Rate

5.600 GTexel/s

-

422.4 GFLOPS

FP32 (float)

168.0 GFLOPS

84.48 GFLOPS

FP64 (double)

-

Board Design

55W

TDP

35W

-

No outputs

Outputs

No outputs

-

Graphics Processor

M88

GPU Name

M76

-

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

55 nm

Process Size

65 nm

0.666 billion

Transistors

0.39 billion

192 mm²

Die Size

153 mm²

Graphics Features

10.1 (10_1)

DirectX

10.0 (10_0)

3.3

OpenGL

3.3

N/A

OpenCL

N/A

Vulkan

N/A

-

4.1

Shader Model

4.0

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