Radeon HD 4870 and Radeon X1900 XT - video card comparison

Radeon HD 4870

Radeon X1900 XT

Architecture

TeraScale (2005−2013)

R500 (2005−2007)

GPU code name

RV770

R580

Market segment

Desktop

Release date

June 2008

January 2006

Interface

PCIe 2.0 x16

PCIe 1.0 x16

Supplementary power connectors

2x 6-pin

1x 6-pin

Core clock speed

750 MHz

625 MHz

Floating-point performance

1,200.0 gflops

Manufacturing process technology

55 nm

90 nm

Number of transistors

956 million

384 million

Pipelines / CUDA cores

800

Power consumption (TDP)

150 Watt

100 Watt

Texture fill rate

30.00

10.00

Memory type

GDDR5

GDDR3

Maximum RAM amount

1 GB

256 MB

Memory bus width

256 Bit

Memory clock speed

3600 MHz

1450 MBps

Memory bandwidth

115.2 GB/s

46.4 GB/s

Display Connectors

2x DVI, 1x S-Video

DirectX

10.1 (10_1)

9.0c (9_3)

OpenCL

1.1

N/A

OpenGL

3.3

2.1 (full) Shader Model4.13.0

Vulkan

N/A