Radeon R7 M340 and HD Graphics 620 - video card comparison
Passmark - benchmark score Radeon R7 M340 vs HD Graphics 620
Radeon R7 M340
679
HD Graphics 620
963
Radeon R7 M340
HD Graphics 620
Architecture
GCN (2011−2017)
Gen. 9.5 Kaby Lake (2015−2017)
GPU code name
Meso Pro DDR3
Kaby-Lake GT2
Market segment
Laptop
Laptop
Release date
June 2015
August 2016
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x8
PCIe 3.0 x1
Supplementary power connectors
None
-
Boost clock speed
1021 MHz
1050 MHz
Compute units
6
-
Core clock speed
1021 MHz
300 MHz
Floating-point performance
549.1 gflops
403.2 gflops
Manufacturing process technology
28 nm
14 nm
Number of transistors
950 million
189 million
Pipelines / CUDA cores
320
24
Power consumption (TDP)
-
15 Watt
Texture fill rate
17.16
25.20
Memory type
DDR3
DDR3L/LPDDR3/LPDDR4
Maximum RAM amount
4 GB
32 GB
Memory bus width
128 Bit
64/128 Bit
Memory clock speed
1000 MHz
System Shared
Memory bandwidth
16 GB/s
-
Shared memory
-
+
Display Connectors
No outputs
No outputs
Eyefinity
1
-
DirectX
DirectX® 12
12 (12_1)
Mantle
+
-
OpenCL
Not Listed
2.1
OpenGL
4.4
4.6
Shader Model
5.1
6.4
Vulkan
+
+
AppAcceleration
-
-
DualGraphics
1
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
PowerTune
+
-
Quick Sync
-
+
Switchable graphics
1
-
TrueAudio
-
-
ZeroCore
+
-