Radeon HD 7870 and Quadro K420 - video card comparison
Passmark - benchmark score Radeon HD 7870 vs Quadro K420
Radeon HD 7870
4779
Quadro K420
768
Radeon HD 7870
Quadro K420
Architecture
GCN (2011−2017)
Kepler (2012−2018)
GPU code name
Pitcairn XT
GK107
Market segment
Desktop
Workstation
Release date
March 2012
July 2014
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
None
Core clock speed
1000 MHz
876 MHz
Floating-point performance
-
336.4 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2800 Million
1,270 million
Pipelines / CUDA cores
1280
192
Power consumption (TDP)
175 Watt
41 Watt
Texture fill rate
80.00
14.02
Memory type
GDDR5
128 Bit
Maximum RAM amount
2 GB
1 GB/2 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
4800 MHz
1782 MHz
Memory bandwidth
153.6 GB/s
Up to 29 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
DVI-I DP
Number of simultaneous displays
-
4
Eyefinity
+
-
HDMI
+
-
DirectX
12 (11_1)
12
CUDA
-
3.0
OpenCL
1.2
1.2
OpenGL
4.6
4.5
Shader Model
5.1
5
Vulkan
1.2.131
+
3D Vision Pro
-
+
Mosaic
-
+
nView Desktop Management
-
+