Radeon HD 7970 and Radeon R7 M340 - video card comparison
Passmark - benchmark score Radeon HD 7970 vs Radeon R7 M340
Radeon HD 7970
5405
Radeon R7 M340
679
Radeon HD 7970
Radeon R7 M340
Architecture
GCN (2011−2017)
GCN (2011−2017)
GPU code name
Tahiti XT
Meso Pro DDR3
Market segment
Desktop
Laptop
Release date
December 2011
June 2015
Bus support
PCIe 2.1 x16
PCIe 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Supplementary power connectors
1x 6-pin + 1x 8-pin
None
Boost clock speed
925 MHz
1021 MHz
Compute units
-
6
Core clock speed
-
1021 MHz
Floating-point performance
3,789 gflops
549.1 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
950 million
Pipelines / CUDA cores
2048
320
Power consumption (TDP)
300 Watt
-
Texture fill rate
118.4
17.16
Memory type
GDDR5
DDR3
Maximum RAM amount
6 GB
4 GB
Memory bus width
384 Bit
128 Bit
Memory clock speed
1375 MHz
1000 MHz
Memory bandwidth
264 GB/s
16 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
Eyefinity
+
1
HDMI
+
-
DisplayPort support
-
-
DirectX
DirectX® 11
DirectX® 12
Mantle
-
+
OpenCL
1.2
Not Listed
OpenGL
4.6
4.4
Shader Model
5.1
5.1
Vulkan
-
+
AppAcceleration
-
-
CrossFire
1
-
DualGraphics
-
1
Enduro
-
-
FreeSync
1
1
HD3D
-
+
PowerTune
-
+
Switchable graphics
-
1
TrueAudio
-
-
ZeroCore
-
+