ATI Mobility Radeon HD 3870: GPU Specs & Benchmarks

The Mobility Radeon HD 3870 is a graphics card by ATI, built on the 55 nm process and based on the M88 graphics processor (GPU). The video card specifications and performance tests (benchmarks) are listed below.

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Graphics Processor (GPU)

GPU Name

M88

Architecture

TeraScale

Foundry

TSMC

Process Size

55 nm

Transistors

666 million

Die Size

192 mm²

Graphics Card

Release Date

Jun 4th, 2008

Family

M8x
(Mobility HD 3800)

Production

End-of-life

Predecessor

M7x

Bus Interface

PCIe 2.0 x16

Memory

Memory Size

512 MB

Memory Type

GDDR3

Memory Bus

256 bit

Bandwidth

54.40 GB/s

Performance

Pixel fillrate

10.56 GPixel/s

Texture fillrate

10.56 GTexel/s

FP32 (float) performance

422.4 GFLOPS

FP64 (double) performance

84.48 GFLOPS (1:5)

Clock Speeds

Memory Clock

850 MHz
1700 Mbps effective

GPU Clock

660 MHz

Render Config

Shading Units

320

TMUs

16

ROPs

16

Compute Units

4

L2 Cache

256 KB

Board Design

Thermal design power (TDP)

55 W

Display Connectors

No outputs

API support

DirectX

10.1 (10_1)

OpenGL

3.3

OpenCL

N/A

Vulkan

N/A

Shader Model

4.1