M4 vs R420

Primary details

GPU architecture, market segment, value for money and other general parameters compared.

Place in performance ranking	not rated	not rated
Place by popularity	not in top-100	not in top-100
Architecture	R400 (2004−2008)	Rage 4 (1998−1999)
GPU code name	R420	M4
Market segment	Desktop	Desktop
Release date	no data	no data
Current price	$18.19	$70

Detailed specifications

General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Number of transistors	160 million	8 million
Manufacturing process technology	130 nm	250 nm

API compatibility

List of supported graphics and general-purpose computing APIs, including their specific versions.

DirectX	9.0b (9_2)	6.0
OpenGL	2.1	1.2
OpenCL	N/A	N/A
Vulkan	N/A	N/A

Pros & cons summary

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Chip lithography

130 nm

250 nm

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