Radeon HD 3870 X2 and Radeon HD 8650G + HD 8670M Dual Graphics - video card comparison
Radeon HD 3870 X2
Radeon HD 8650G + HD 8670M Dual Graphics
Architecture
TeraScale (2005−2013)
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GPU code name
R680
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Market segment
Desktop
Laptop
Release date
January 2008
August 2013
Interface
PCIe 2.0 x16
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Supplementary power connectors
1x 6-pin + 1x 8-pin
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Core clock speed
825 MHz
720 / 775 MHz
Floating-point performance
2x 528.0 gflops
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Manufacturing process technology
55 nm
28 nm
Number of transistors
666 million
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Pipelines / CUDA cores
320
768
Power consumption (TDP)
165 Watt
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Texture fill rate
13.20
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Memory type
GDDR3
DDR3
Maximum RAM amount
512 MB
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Memory bus width
256 Bit
64 Bit
Memory clock speed
1802 MHz
1800 - 2000 MHz
Memory bandwidth
57.66 GB/s
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Shared memory
-
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Display Connectors
2x DVI, 1x S-Video
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DirectX
10.1 (10_1)
11
OpenCL
N/A
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OpenGL
3.3
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Shader Model
4.1
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Vulkan
N/A
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