Radeon HD 4870 and Radeon HD 3870 AGP - video card comparison
Radeon HD 4870
Radeon HD 3870 AGP
Architecture
TeraScale (2005−2013)
TeraScale (2005−2013)
GPU code name
RV770
RV670
Market segment
Desktop
Desktop
Release date
June 2008
-
Interface
PCIe 2.0 x16
AGP 8x
Supplementary power connectors
2x 6-pin
1x 8-pin
Core clock speed
750 MHz
777 MHz
Floating-point performance
1,200.0 gflops
-
Manufacturing process technology
55 nm
55 nm
Number of transistors
956 million
666 million
Pipelines / CUDA cores
800
320
Power consumption (TDP)
150 Watt
106 Watt
Texture fill rate
30.00
12.43
Memory type
GDDR5
GDDR4
Maximum RAM amount
1 GB
512 MB
Memory bus width
256 Bit
256 Bit
Memory clock speed
3600 MHz
2.3 GB/s
Memory bandwidth
115.2 GB/s
72.06 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 (full)
Shader Model4.14.1
Vulkan
N/A
N/A