ATI Mobility Radeon HD 4870: GPU Specs & Benchmarks

The Mobility Radeon HD 4870 is a graphics card by ATI, built on the 55 nm process and based on the M98 graphics processor (GPU). The video card specifications and performance tests (benchmarks) are listed below.

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Graphics Processor (GPU)

GPU Name

M98

Model number

M98 XT
(216-0732023)

Architecture

TeraScale

Foundry

TSMC

Process Size

55 nm

Transistors

956 million

Die Size

256 mm²

Graphics Card

Release Date

Jan 9th, 2009

Family

M9x
(Mobility HD 4800)

Production

End-of-life

Predecessor

M8x

Bus Interface

PCIe 2.0 x16

Memory

Memory Size

512 MB

Memory Type

GDDR3

Memory Bus

256 bit

Bandwidth

56.83 GB/s

Performance

Pixel fillrate

8.800 GPixel/s

Texture fillrate

22.00 GTexel/s

FP32 (float) performance

880.0 GFLOPS

FP64 (double) performance

176.0 GFLOPS (1:5)

Clock Speeds

Memory Clock

888 MHz
1776 Mbps effective

GPU Clock

550 MHz

Render Config

Shading Units

800

TMUs

40

ROPs

16

Compute Units

10

L1 Cache

16 KB (per CU)

L2 Cache

256 KB

Board Design

Thermal design power (TDP)

unknown

Display Connectors

No outputs

API support

DirectX

10.1 (10_1)

OpenGL

3.3

OpenCL

1.1

Vulkan

N/A

Shader Model

4.1