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ATI R423

Default
R423
Block Diagram
Block Diagram
ATI's R423 GPU uses the R400 architecture and is made using a 130 nm production process at TSMC. With a die size of 289 mm² and a transistor count of 160 million it is a medium-sized chip. R423 supports DirectX 9.0b (Feature Level 9_2). It features 16 pixel shaders and 6 vertex shaders, 16 texture mapping units and 16 ROPs. Due to the lack of unified shaders you will not be able to run recent games at all (which require unified shader/DX10+ support).

Graphics Processor

GPU Name
R423
Architecture
R400
Foundry
TSMC
Process Size
130 nm
Transistors
160 million
Density
553.6K / mm²
Die Size
289 mm²
Released
Mar 1st, 2004

Graphics Features

DirectX
9.0b (9_2)
OpenGL
2.0
OpenCL
N/A
Vulkan
N/A
Pixel Shader
2.0b
Vertex Shader
2.0b
Compute
GFX2

Render Config

Pixel Shaders
16
Vertex Shaders
6
TMUs
16
ROPs
16
Max. TDP
91 W

All R400 GPUs

ATI GPU Architecture History

Graphics cards using the ATI R423 GPU

Name Chip Memory Shaders TMUs ROPs GPU Clock Memory Clock
ATI Radeon X800 XT R423 XT 256 MB 16 / 6 16 16 500 MHz 500 MHz
ATI Radeon X800 XT Platinum R423 XT 256 MB 16 / 6 16 16 520 MHz 560 MHz
ATI Radeon X800 SE R423 SE 128 MB 8 / 6 8 8 425 MHz 700 MHz
ATI FireGL V5100 R423 GL-SE 128 MB 12 / 6 12 12 450 MHz 350 MHz
ATI FireGL V7100 R423 GL 256 MB 16 / 6 16 16 493 MHz 475 MHz
ATI Radeon X800 CrossFire Edition 256 MB 16 / 6 16 16 500 MHz 500 MHz
ATI Radeon X800 XT Mac Edition R423 XT 256 MB 16 / 6 16 16 475 MHz 500 MHz
ATI Radeon X800 GTO R423 GTO 128 MB 12 / 6 12 12 400 MHz 350 MHz
ATI Radeon X800 PRO R423 PRO 256 MB 12 / 6 12 12 475 MHz 450 MHz

R423 GPU Notes

Codename: Thor
Graphics/Compute: GFX2
Video Shader HD
Programmable pixel&vertex pipelines