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ATI R420

Default
R420
Die Shot
Die Shot
ATI's R420 GPU uses the R400 architecture and is made using a 130 nm production process at TSMC. With a die size of 281 mm² and a transistor count of 160 million it is a medium-sized chip. R420 supports DirectX 9.0b (Feature Level 9_2). Modern GPU compute technologies are not available. 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
R420
Architecture
R400
Foundry
TSMC
Process Size
130 nm
Transistors
160 million
Density
569.4K / mm²
Die Size
281 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
63 W

All R400 GPUs

ATI GPU Architecture History

Graphics cards using the ATI R420 GPU

Name Chip Memory Shaders TMUs ROPs GPU Clock Memory Clock
ATI Radeon X800 XT Platinum AGP R420 XT 256 MB 16 / 6 16 16 520 MHz 560 MHz
ATI Radeon X800 PRO AGP R420 PRO 256 MB 12 / 6 12 12 475 MHz 450 MHz
ATI Radeon X800 XT AGP R420 XT 256 MB 16 / 6 16 16 500 MHz 500 MHz
ATI Radeon X800 SE AGP R420 SE 256 MB 8 / 6 8 8 450 MHz 400 MHz
ATI All-In-Wonder X800 XT R420 AIW 256 MB 16 / 6 16 16 500 MHz 500 MHz
ATI FireGL X3-256 R420 GL 256 MB 12 / 6 12 12 491 MHz 454 MHz
ATI All-In-Wonder X800 VE R420 AIW 256 MB 8 / 6 8 8 425 MHz 400 MHz
ATI Radeon X800 GTO AGP R420 GTO 256 MB 12 / 6 12 12 400 MHz 490 MHz
ATI Radeon X800 GT AGP R420 GT 256 MB 8 / 6 8 8 473 MHz 493 MHz
ATI Radeon X800 VE AGP R420 VE 256 MB 16 / 6 16 16 425 MHz 398 MHz
ATI All-In-Wonder X800 SE R420 AIW 256 MB 8 / 6 8 8 425 MHz 400 MHz

R420 GPU Notes

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