Radeon R7 M340 and Radeon R5 M255 - video card comparison
Passmark - benchmark score Radeon R7 M340 vs Radeon R5 M255
Radeon R7 M340
679
Radeon R5 M255
550
Radeon R7 M340
Radeon R5 M255
Architecture
GCN (2011−2017)
GCN (2011−2017)
GPU code name
Meso Pro DDR3
Topaz Pro / Sun
Market segment
Laptop
Laptop
Release date
June 2015
May 2014
Bus support
PCIe 3.0
PCIe 3.0 x8
Interface
PCIe 3.0 x8
PCIe 3.0 x8
Supplementary power connectors
None
-
Boost clock speed
1021 MHz
940 MHz
Compute units
6
5
Core clock speed
1021 MHz
940 MHz
Floating-point performance
549.1 gflops
721.9 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
950 million
1,550 million
Pipelines / CUDA cores
320
320
Texture fill rate
17.16
22.56
Memory type
DDR3
DDR3
Maximum RAM amount
4 GB
4 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
1000 MHz
1000 MHz
Memory bandwidth
16 GB/s
16 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
Eyefinity
1
+
DirectX
DirectX® 12
DirectX® 11
Mantle
+
+
OpenCL
Not Listed
Not Listed
OpenGL
4.4
4.4
Shader Model
5.1
6.3
Vulkan
+
-
AppAcceleration
-
+
DualGraphics
1
1
Enduro
-
-
FreeSync
1
-
HD3D
+
+
PowerTune
+
+
Switchable graphics
1
1
TrueAudio
-
-
ZeroCore
+
+