ATI Radeon HD 4870 X2 Full Specs

Summary

1,600 Shaders 750MHz

2GB GDDR5230.4GB/s

Peak·FP32·FP16 2.4 TFLOPS

Form Factor PCIe Card

TDP 286W

Power Connectors 1x 8-Pin 1x 6-Pin

Theoretical Performance

Clock Speed750MHz UC·Boost·OC

Peak OPS 2.4 TFLOPSFP32

FP32 2.4 TFLOPS

FP64 480 GFLOPS

Pixel Rate 12 GPixel/s

Texture Rate 30 GTexel/s

Core Config

Shaders 1,600 Shaders

TMUs 80 TMUs

ROPs 32 ROPs

CUs 20 CUs

Clocks

Boost Clock 750MHz

Cache

L1 16KB/CU

L2 Cache 256KB shared

Memory

2GB GDDR5

Memory Bus 256-bit

Memory Speed 3.6GT/s

Memory Bandwidth 230.4GB/s

ECC No

Power & Thermals

TDP 286W

Video Output

Max Resolution 2560x1600

Refresh Rate Calculator 2560x1440 Resolution1440p QHD Refresh Rate 66Hz

Multi-Monitor 2

DSC Not Supported

Ports

2x DVI-I Dual-Link 1x S-Video

API Support

Shader Model 4.1

DirectX DirectX 10 Direct3D 10_1

OpenGL 3.3 OpenCL 1.1

GFX 3

Decoder

Decoder UVD 2.0

Codec VC-1 AVC (H.264)

Card

Form Factor PCIe Card

PCIe PCIe 2.0 x16 2-Slots

Cooling Blower 1x Fan

Power Connectors 1x 8-Pin, 1x 6-Pin

Multi-GPU Multi-GPU Support Supported Multi-GPU Type 2-way CrossFireX

Chip

Manufacturer ATI

Chip Designer ATI

Architecture TeraScale 1

Family Radeon HD 4000

Branding

Codename Wekiva

Chip Variant RV770 CE

Market Segment Desktop

Release Date Aug 12, 2008

Fabrication

Foundry TSMC

Fabrication Node 55nm

Die Size 256mm²

Transistor Count 956M

Transistor Density 3.73 MTr/mm²

Images