Introduced: 2004-05-04
Description: New high end graphics chip succeeding the R350/R360 based on a completely new design also known as project Loki. Was to be shown at Comdex in November-03, but was only shown to NDA-signing people on CeBIT-04 and launched to the rest of us in May. Was earlier said to support unified DX 9.0c and Pixel and Vertex Shaders 3.0, but only DirectX 9.0b is supported.
The R420 is a simplified version of the R400 (now R500) to get a new high-end chip out quicker. R420 still uses 24 bit precision (96 bit in total) but adds 3Dc compression.
Native PCI-Express support shows up in the R423 (X800 PCI-E), formely known as X880 on June 1st.
Two versions are launched: The X800 Pro includes 12 pipelines with availability now, while the X800 XT uses 16 and ships on May 21st. A low cost X800 SE with only 8 pipelines is also planned. Previously known as R420.Type: Graphics [Roadmap] [Timeline]
State: Released
Die size ~257 mm2 Process 130 nm low-k Core speed 475 - 520 MHz Transistors 160 M Price $399 - $499 Pipelines 12-16 Memory DDR450, 256 bit DDR-II, GDDR2, GDDR3 0.9 - 1.12 GHz AGP AGP8X, PCI-Express Type Desktop Fill rate 5.7-8.3 Gpix/s, 5.7-8.3 Gtex/s RAMDAC 2x400 MHz + DVI 1.0 DirectX 9.0b Core Loki Triangles/s 475-520 M Vertex shaders 6 x 2.0 Pixel shaders 16 x 2.0
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2004-04-08 ATI Boosts RADEON X800 Specifications: ATI's R420 Increases Number of Pipelines Xbit Labs [rm]
2004-04-07 ATI R420 becomes Radeon X800 PRO on April 26 - report The Inquirer [rm]
2004-04-07 Nvidia sets NV40 launch date on April 14 DigiTimes [rm]
2004-04-06 Tech Update: R420 Gets a Name and Birthday: X800 AnandTech [rm]
2004-04-02 Nvidia, ATI tech: DustBuster and PurseBuster? The Inquirer [rm]
2004-04-01 ATI's Fuddy, leaks and spin The Inquirer [rm]
2004-03-25 ATI and Nvidia to roll out last AGP8X chips before PCI Express takes the reins DigiTimes [rm]
2004-03-20 Deadly dozen pipelines and PS2.0 leave ATI gasping The Inquirer [rm]
2004-03-15 ATi's upcoming R420 to sport 12 pipelines The Inquirer [rm]
2004-03-11 ATI 'drops pixel, vertex shader 3.0 support' from R420: Now they're waking up... :) The Register [rm]
2004-03-11 Germans cast doubt on ATI Shader 3.0 support The Inquirer [rm]
2004-03-03 ATi R420, R423 & Co. Informationen: Only 2.x shaders supported 3DCenter [rm]
2004-03-01 ATI to show R420 in pokey, smokey back rooms The Inquirer [rm]
2004-02-27 ATI R420 "skateboard" spotted The Inquirer [rm]
2004-02-19 ATI Technologies Showcases R420 at Intel Developer Forum: Graphics Company Gives Sneak Peak on Next Generation VPU Performance Xbit Labs [rm]
2004-02-15 R423 is ATI's PCI Express part The Inquirer [rm]
2004-02-13 ATI's 2004 Plans Unveiled: R420/423 Specs Inside AnandTech [rm]
2004-02-11 More ATI R420 details emerge The Inquirer [rm]
2004-02-02 NV40 and R420 memory secrets revealed: GDDR3 won't be ready in time The Inquirer [rm]
2004-01-28 News des 14. Januar 2004 Other [rm]
2004-01-22 R420 to support DDR, DDR II and GDDR 3 The Inquirer [rm]
2004-01-19 ATI's R420 silicon ships to partners The Inquirer [rm]
2004-01-15 Nvidia and ATI produce new chipsets with 0.11-micron process at TSMC DigiTimes [rm]
2004-01-13 Nvidia's NV 40 tapes out: On shelves in April, May The Inquirer [rm]
2003-12-24 Man goes to toilet, snaps ATI PCI Express The Inquirer [rm]
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