Radeon HD 3870 X2 and Radeon HD 3850 X3 - video card comparison
Radeon HD 3870 X2
Radeon HD 3850 X3
Architecture
TeraScale (2005−2013)
TeraScale (2005−2013)
GPU code name
R680
RV670
Market segment
Desktop
Desktop
Release date
January 2008
-
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
1x 6-pin + 1x 8-pin
1x 8-pin
Core clock speed
825 MHz
669 MHz
Floating-point performance
2x 528.0 gflops
-
Manufacturing process technology
55 nm
55 nm
Number of transistors
666 million
666 million
Pipelines / CUDA cores
320
320
Power consumption (TDP)
165 Watt
145 Watt
Texture fill rate
13.20
10.70
Memory type
GDDR3
GDDR3
Maximum RAM amount
512 MB
512 MB
Memory bus width
256 Bit
256 Bit
Memory clock speed
1802 MHz
1700 MBps
Memory bandwidth
57.66 GB/s
54.4 GB/s
Display Connectors
2x DVI, 1x S-Video
4x DVI
DirectX
10.1 (10_1)
10.1 (10_1)
OpenCL
N/A
N/A
OpenGL
3.3
3.3 (full)
Shader Model4.14.1
Vulkan
N/A
N/A