ATI R420

R420

Oleg Kashirin

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

Released: Mar 1st, 2004

GPU Name: R420

Mobile Variant: M18

Codename: Loki

Architecture: R400

Foundry: TSMC

Process Size: 130 nm

Transistors: 160 million

Density: 569.4K / mm²

Die Size: 281 mm²

Package: FCBGA-1265

Package Size: 42.5 mm × 42.5 mm

Graphics Features

DirectX: 9.0b (9_2)

OpenGL: 2.1

OpenCL: N/A

Vulkan: N/A

Pixel Shader: 2.0b

Vertex Shader: 2.0b

WDDM: 1.0

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

2009-2015 TeraScale 2
2005-2013 TeraScale
2005-2007 Ultra-Threaded SE
2004-2008 R400
2002-2008 R300
2001-2006 Rage 7
2000 Rage 5
2000-2007 Rage 6
1999-2001 IBM
1998-1999 Rage 4
1997 Rage 2
1997-1999 Rage 3
1992-1997 Mach
1986-1992 Wonder

Graphics cards using the ATI R420 GPU

Name	Chip	Memory	Shaders	TMUs	ROPs	GPU Clock	Memory Clock
ATI Radeon X800 XT Platinum AGP	R420 XTP	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 LE	256 MB	8 / 6	8	8	450 MHz	400 MHz
ATI All-In-Wonder X800 XT	R420 XT	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 LE	256 MB	8 / 6	8	8	425 MHz	400 MHz
ATI Radeon X800 GTO AGP	R420 PRO	256 MB	12 / 6	12	12	400 MHz	490 MHz
ATI Radeon X800 GT AGP	R420 LE	256 MB	8 / 6	8	8	473 MHz	493 MHz
ATI Radeon X800 VE AGP	R420 XT	256 MB	16 / 6	16	16	425 MHz	398 MHz
ATI All-In-Wonder X800 SE	R420 LE	256 MB	8 / 6	8	8	425 MHz	400 MHz

R420 GPU Notes

Mobile Variant: M18
Codename: Loki
Graphics/Compute: GFX2
Smart Shader HD
Smooth Vision HD
TruForm 2.0
Hyper Z HD
Video Shader HD
3Dc Compression
Programmable pixel&vertex pipelines

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