Radeon HD 3870 and Radeon HD 2900 XT - video card comparison
Passmark - benchmark score Radeon HD 3870 vs Radeon HD 2900 XT
Radeon HD 3870
572
Radeon HD 2900 XT
679
Radeon HD 3870
Radeon HD 2900 XT
Architecture
TeraScale (2005−2013)
TeraScale (2005−2013)
GPU code name
RV670
R600
Market segment
Desktop
Desktop
Release date
November 2007
May 2007
Interface
PCIe 2.0 x16
PCIe 1.0 x16
Supplementary power connectors
1x 6-pin
1x 6-pin + 1x 8-pin
Core clock speed
777 MHz
743 MHz
Floating-point performance
497.3 gflops
475.5 gflops
Manufacturing process technology
55 nm
80 nm
Number of transistors
666 million
720 million
Pipelines / CUDA cores
320
320
Power consumption (TDP)
106 Watt
215 Watt
Texture fill rate
12.43
11.89
Memory type
GDDR4
GDDR3
Maximum RAM amount
512 MB
512 MB
Memory bus width
256 Bit
512 Bit
Memory clock speed
2252 MHz
1656 MHz
Memory bandwidth
72.06 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
N/A
N/A
OpenGL
3.3
3.3
Shader Model
4.1
4.0
Vulkan
N/A
N/A