Radeon R7 M340 and Radeon RX 580 XTR - video card comparison
Radeon R7 M340
Radeon RX 580 XTR
Architecture
GCN (2011−2017)
GCN 4.0 (2016−2020)
GPU code name
Meso Pro DDR3
Polaris 20
Market segment
Laptop
Desktop
Release date
June 2015
April 2017
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x8
PCIe 3.0 x16
Supplementary power connectors
None
1x 8-pin
Boost clock speed
1021 MHz
1340 MHz
Compute units
6
-
Core clock speed
1021 MHz
1257 MHz
Floating-point performance
549.1 gflops
6,175 gflops
Manufacturing process technology
28 nm
14 nm
Number of transistors
950 million
5,700 million
Pipelines / CUDA cores
320
2304
Power consumption (TDP)
-
185 Watt
Texture fill rate
17.16
193.0
Memory type
DDR3
GDDR5
Maximum RAM amount
4 GB
8 GB
Memory bus width
128 Bit
256 Bit
Memory clock speed
1000 MHz
8000 MHz
Memory bandwidth
16 GB/s
256.0 GB/s
Shared memory
-
-
Display Connectors
No outputs
1x HDMI, 3x DisplayPort
Eyefinity
1
-
HDMI
-
+
DirectX
DirectX® 12
12.0 (12_0)
Mantle
+
-
OpenCL
Not Listed
-
OpenGL
4.4
4.5
Shader Model
5.1
-
Vulkan
+
-
AppAcceleration
-
-
DualGraphics
1
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
PowerTune
+
-
Switchable graphics
1
-
TrueAudio
-
-
ZeroCore
+
-