Radeon HD 3870 and Radeon X1950 XT AGP - video card comparison
Radeon HD 3870
Radeon X1950 XT AGP
Architecture
TeraScale (2005−2013)
R500 (2005−2007)
GPU code name
RV670
R580+
Market segment
Desktop
Desktop
Release date
November 2007
October 2006
Interface
PCIe 2.0 x16
AGP 8x
Supplementary power connectors
1x 6-pin
1x 6-pin
Core clock speed
777 MHz
625 MHz
Floating-point performance
497.3 gflops
-
Manufacturing process technology
55 nm
90 nm
Number of transistors
666 million
384 million
Pipelines / CUDA cores
320
-
Power consumption (TDP)
106 Watt
96 Watt
Texture fill rate
12.43
10.00
Memory type
GDDR4
GDDR3
Maximum RAM amount
512 MB
256 MB
Memory bus width
256 Bit
256 Bit
Memory clock speed
2252 MHz
1406 MHz
Memory bandwidth
72.06 GB/s
44.99 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