Radeon HD 7970 and Quadro K620 - video card comparison
Passmark - benchmark score Radeon HD 7970 vs Quadro K620
Radeon HD 7970
5405
Quadro K620
2297
Radeon HD 7970
Quadro K620
Architecture
GCN (2011−2017)
Maxwell (2014−2018)
GPU code name
Tahiti XT
GM107
Market segment
Desktop
Workstation
Release date
December 2011
July 2014
Bus support
PCIe 2.1 x16
-
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
1x 6-pin + 1x 8-pin
None
Boost clock speed
925 MHz
1124 MHz
Core clock speed
-
1058 MHz
Floating-point performance
3,789 gflops
863.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
1,870 million
Pipelines / CUDA cores
2048
384
Power consumption (TDP)
300 Watt
41 Watt
Texture fill rate
118.4
26.98
Memory type
GDDR5
128 Bit
Maximum RAM amount
6 GB
2 GB
Memory bus width
384 Bit
128 Bit
Memory clock speed
1375 MHz
1800 MHz
Memory bandwidth
264 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
+
-
DisplayPort support
-
-
DirectX
DirectX® 11
12
CUDA
-
5.0
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.5
Shader Model
5.1
5
Vulkan
-
+
3D Vision Pro
-
+
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
Mosaic
-
+
nView Desktop Management
-
+
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-