Quadro K420 and Radeon HD 6850M - video card comparison
Quadro K420
Radeon HD 6850M
Architecture
Kepler (2012−2018)
Terascale 2 (2009−2015)
GPU code name
GK107
Granville Pro/LP
Market segment
Workstation
Laptop
Release date
July 2014
January 2011
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
None
-
Core clock speed
876 MHz
575 / 675 MHz
Floating-point performance
336.4 gflops
1,080.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
1,270 million
1,040 million
Pipelines / CUDA cores
192
800
Power consumption (TDP)
41 Watt
50 Watt
Texture fill rate
14.02
27.00
Memory type
128 Bit
DDR3, GDDR5
Maximum RAM amount
1 GB/2 GB
1 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
1782 MHz
800 MHz
Memory bandwidth
Up to 29 GB/s
25.6 GB/s
Shared memory
-
-
Display Connectors
DVI-I DP
No outputs
Number of simultaneous displays
4
-
DirectX
12
11.2 (11_0)
CUDA
3.0
-
OpenCL
1.2
1.2
OpenGL
4.5
4.4
Shader Model
5
5.0
Vulkan
+
N/A
3D Vision Pro
+
-
Mosaic
+
-
nView Desktop Management
+
-