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.
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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2004-09-06 GPU Cheatsheet - A History of Modern Consumer Graphics Processors: For our next installment of the Cheatsheet series, we explore modern graphics processors and their relative performance, die size and other tidbits. AnandTech [rm]