Radeon HD 4870 and Radeon HD 2900 XT - video card comparison
Passmark - benchmark score Radeon HD 4870 vs Radeon HD 2900 XT
Radeon HD 4870
1411
Radeon HD 2900 XT
679
Radeon HD 4870
Radeon HD 2900 XT
Architecture
TeraScale (2005−2013)
TeraScale (2005−2013)
GPU code name
RV770
R600
Market segment
Desktop
Desktop
Release date
June 2008
May 2007
Interface
PCIe 2.0 x16
PCIe 1.0 x16
Supplementary power connectors
2x 6-pin
1x 6-pin + 1x 8-pin
Core clock speed
750 MHz
743 MHz
Floating-point performance
1,200.0 gflops
475.5 gflops
Manufacturing process technology
55 nm
80 nm
Number of transistors
956 million
720 million
Pipelines / CUDA cores
800
320
Power consumption (TDP)
150 Watt
215 Watt
Texture fill rate
30.00
11.89
Memory type
GDDR5
GDDR3
Maximum RAM amount
1 GB
512 MB
Memory bus width
256 Bit
512 Bit
Memory clock speed
3600 MHz
1656 MHz
Memory bandwidth
115.2 GB/s
106.0 GB/s
Display Connectors
2x DVI, 1x S-Video
2x DVI, 1x S-Video
DirectX
10.1 (10_1)
10.0 (10_0)
OpenCL
1.1
N/A
OpenGL
3.3
3.3
Shader Model
4.1
4.0
Vulkan
N/A
N/A