Radeon HD 3850 X2 and GeForce 820A - video card comparison
Passmark - benchmark score Radeon HD 3850 X2 vs GeForce 820A
Radeon HD 3850 X2
847
GeForce 820A
572
Radeon HD 3850 X2
GeForce 820A
Architecture
TeraScale (2005−2013)
Fermi 2.0 (2010−2014)
GPU code name
RV670
GF117
Market segment
Desktop
Desktop
Release date
April 2008
March 2014
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Core clock speed
669 MHz
775 MHz
Floating-point performance
2x 428.2 gflops
297.6 gflops
Manufacturing process technology
55 nm
28 nm
Number of transistors
666 million
585 million
Pipelines / CUDA cores
320
96
Power consumption (TDP)
140 Watt
15 Watt
Texture fill rate
10.70
12.40
Memory type
GDDR3
DDR3
Maximum RAM amount
512 MB
1 GB
Memory bus width
256 Bit
64 Bit
Memory clock speed
1656 MHz
1800 MHz
Memory bandwidth
52.99 GB/s
14.4 GB/s
Display Connectors
2x DVI, 1x S-Video
No outputs
DirectX
10.1 (10_1)
12 (11_0)
CUDA
-
2.1
OpenCL
N/A
1.1
OpenGL
3.3
4.6
Shader Model
4.1
5.1
Vulkan
N/A
N/A