Radeon HD 4870 and Radeon HD 4580 - video card comparison
Radeon HD 4870
Radeon HD 4580
Architecture
TeraScale (2005−2013)
TeraScale (2005−2013)
GPU code name
RV770
RV635
Market segment
Desktop
Desktop
Release date
June 2008
November 2011
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
None
Core clock speed
750 MHz
796 MHz
Floating-point performance
1,200.0 gflops
191.04 gflops
Manufacturing process technology
55 nm
55 nm
Number of transistors
956 million
378 million
Pipelines / CUDA cores
800
120
Power consumption (TDP)
150 Watt
65 Watt
Texture fill rate
30.00
6.368
Memory type
GDDR5
GDDR3
Maximum RAM amount
1 GB
512 MB
Memory bus width
256 Bit
128 Bit
Memory clock speed
3600 MHz
1386 MHz
Memory bandwidth
115.2 GB/s
22.18 GB/s
Display Connectors
2x DVI, 1x S-Video
2x DVI, 1x S-Video
DirectX
10.1 (10_1)
10.1 (10_1)
OpenCL
1.1
N/A
OpenGL
3.3
3.3
Shader Model
4.1
4.1
Vulkan
N/A
N/A