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Mobility Radeon HD 4870 GDDR3

Specifications of the ATI Mobility Radeon HD 4870 GDDR3 GPU


ATI Mobility Radeon HD 4870 GDDR3 mobile Graphics Processing Unit was released in January 2009. The GPU uses Unified Superscalar Shader architecture, and it is manufactured on 55 nm technological process. The card has 550 MHz graphics clock frequency. Furthermore, it has 800 stream processors, 40 texture units, together with 16 color ROPs. The Mobility Radeon HD 4870 GDDR3 incorporates 512 MB of GDDR3 memory, using 256 bit bus. The memory is clocked at 888 MHz, which translates to 56.83 GB/s memory bandwidth. The GPU supports PCI Express 2.0 interface. The ATI Mobility Radeon HD 4870 GDDR3 is compatible with crossfire technology, and can be paired with another card for better game and 3D graphics performance.

Below you will find more detailed specifications of the ATI Mobility Radeon HD 4870 GDDR3 GPU.

Name / Brand / Architecture

Manufacturer:ATI
Model:Mobility Radeon HD 4870 GDDR3
mGPU model number:M98-XT
Reference card?:Yes
Target market segment:Mobile
Die name:RV770
Architecture:Unified Superscalar Shader Architecture
Fabrication process:55 nm
Transistors:956 million
Bus interface:PCI-E 2.0 x 16
Launch date:January 2009

Frequency

Graphics clock:550 MHz

Memory specifications

Memory size:** MB
Memory type:GDDR3
Memory clock:888 MHz
Memory clock (effective):1776 MHz
Memory interface width:**-bit
Memory bandwidth:56.83 GB/s

Cores / Texture

Color ROPs:16
Stream processors:800
Texture units:40
Texture fetches / clock cycle:Up to 160
Textures/pixel:Up to 128
RAMDACs:400 MHz
Decoders:DivX
H.2**
MPEG 1
MPEG-2
VC-1

SLI / Crossfire

Maximum crossfire options:2-way

Video features

Multi-monitor:Up to 2 displays
Maximum digital resolution:**0 x 1600
Maximum VGA resolution:2048 x 1536
HDMI:Yes
HDMI version:1.3

Performance

Pixel fill rate:8.8 Gigapixels/s
Texture fill rate:22 Gigatexels/s
Single presision compute power:880 GFLOPS
Double precision compute power:176 GFLOPS

External connectors

Standard display connectors:2 x Dual-Link DVI
DisplayPort
HDMI
Audio input for HDMI:Yes

Other features / Support

Other features:ATI/AMD PowerPlay
HDCP
High Dynamic Range (HDR) Support
Open CL support:1.0
OpenGL support:3.3
DirectX support:10.1
Shader model:4.1
Windows driver support:Windows 7
Windows Vista
Windows XP
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