Radeon HD 7970 and HD Graphics 620 - video card comparison
Passmark - benchmark score Radeon HD 7970 vs HD Graphics 620
Radeon HD 7970
5405
HD Graphics 620
963
Radeon HD 7970
HD Graphics 620
Architecture
GCN (2011−2017)
Gen. 9.5 Kaby Lake (2015−2017)
GPU code name
Tahiti XT
Kaby-Lake GT2
Market segment
Desktop
Laptop
Release date
December 2011
August 2016
Bus support
PCIe 2.1 x16
-
Interface
PCIe 3.0 x16
PCIe 3.0 x1
Supplementary power connectors
1x 6-pin + 1x 8-pin
-
Boost clock speed
925 MHz
1050 MHz
Core clock speed
-
300 MHz
Floating-point performance
3,789 gflops
403.2 gflops
Manufacturing process technology
28 nm
14 nm
Number of transistors
4,313 million
189 million
Pipelines / CUDA cores
2048
24
Power consumption (TDP)
300 Watt
15 Watt
Texture fill rate
118.4
25.20
Memory type
GDDR5
DDR3L/LPDDR3/LPDDR4
Maximum RAM amount
6 GB
32 GB
Memory bus width
384 Bit
64/128 Bit
Memory clock speed
1375 MHz
System Shared
Memory bandwidth
264 GB/s
-
Shared memory
-
+
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
Eyefinity
+
-
HDMI
+
-
DisplayPort support
-
-
DirectX
DirectX® 11
12 (12_1)
Mantle
-
-
OpenCL
1.2
2.1
OpenGL
4.6
4.6
Shader Model
5.1
6.4
Vulkan
-
+
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
-
-
Quick Sync
-
+
TrueAudio
-
-
ZeroCore
-
-