Radeon R7 M340 and Radeon HD 7640G + HD 7670M Dual Graphics - video card comparison
Radeon R7 M340
Radeon HD 7640G + HD 7670M Dual Graphics
Architecture
GCN (2011−2017)
Terascale 3 (2010−2013)
GPU code name
Meso Pro DDR3
-
Market segment
Laptop
Laptop
Release date
June 2015
May 2012
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x8
-
Supplementary power connectors
None
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Boost clock speed
1021 MHz
-
Compute units
6
-
Core clock speed
1021 MHz
655 / 600 MHz
Floating-point performance
549.1 gflops
-
Manufacturing process technology
28 nm
40 nm
Number of transistors
950 million
-
Pipelines / CUDA cores
320
736
Texture fill rate
17.16
-
Memory type
DDR3
-
Maximum RAM amount
4 GB
-
Memory bus width
128 Bit
128 Bit
Memory clock speed
1000 MHz
1800 MHz
Memory bandwidth
16 GB/s
-
Shared memory
-
+
Display Connectors
No outputs
-
Eyefinity
1
-
DirectX
DirectX® 12
11
Mantle
+
-
OpenCL
Not Listed
-
OpenGL
4.4
-
Shader Model
5.1
-
Vulkan
+
-
AppAcceleration
-
-
DualGraphics
1
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
PowerTune
+
-
Switchable graphics
1
-
TrueAudio
-
-
ZeroCore
+
-