Radeon HD 4580 and Radeon X1950 PRO - video card comparison
Radeon HD 4580
Radeon X1950 PRO
Architecture
TeraScale (2005−2013)
R500 (2005−2007)
GPU code name
RV635
RV570
Market segment
Desktop
Desktop
Release date
November 2011
October 2006
Interface
PCIe 2.0 x16
PCIe 1.0 x16
Supplementary power connectors
None
1x 6-pin
Core clock speed
796 MHz
575 MHz
Floating-point performance
191.04 gflops
-
Manufacturing process technology
55 nm
80 nm
Number of transistors
378 million
330 million
Pipelines / CUDA cores
120
-
Power consumption (TDP)
65 Watt
66 Watt
Texture fill rate
6.368
6.900
Memory type
GDDR3
GDDR3
Maximum RAM amount
512 MB
256 MB
Memory bus width
128 Bit
256 Bit
Memory clock speed
1386 MHz
1380 MHz
Memory bandwidth
22.18 GB/s
44.16 GB/s
Display Connectors
2x DVI, 1x S-Video
2x DVI, 1x S-Video
DirectX
10.1 (10_1)
9.0c (9_3)
OpenCL
N/A
N/A
OpenGL
3.3
2.0
Shader Model
4.1
3.0
Vulkan
N/A
N/A