Radeon HD 6870 and Radeon R7 M340 - video card comparison
Passmark - benchmark score Radeon HD 6870 vs Radeon R7 M340
Radeon HD 6870
2285
Radeon R7 M340
679
Radeon HD 6870
Radeon R7 M340
Architecture
Terascale 2 (2009−2015)
GCN (2011−2017)
GPU code name
RV940 Barts
Meso Pro DDR3
Market segment
Desktop
Laptop
Release date
October 2010
June 2015
Bus support
PCIe 2.0 x16
PCIe 3.0
Interface
PCIe 2.0 x16
PCIe 3.0 x8
Supplementary power connectors
2x 6-pin
None
Boost clock speed
900 MHz
1021 MHz
Compute units
-
6
Core clock speed
-
1021 MHz
Floating-point performance
2,016.0 gflops
549.1 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,700 million
950 million
Pipelines / CUDA cores
1120
320
Power consumption (TDP)
151 Watt
-
Texture fill rate
50.40
17.16
Memory type
GDDR5
DDR3
Maximum RAM amount
1 GB
4 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
1050 MHz
1000 MHz
Memory bandwidth
134.4 GB/s
16 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
Eyefinity
1
1
HDMI
+
-
DisplayPort support
-
-
DirectX
DirectX® 11
DirectX® 12
Mantle
-
+
OpenCL
1.2
Not Listed
OpenGL
4.4
4.4
Shader Model
5.0
5.1
Vulkan
-
+
AppAcceleration
-
-
CrossFire
1
-
DualGraphics
-
1
Enduro
-
-
FreeSync
-
1
HD3D
-
+
PowerTune
-
+
Switchable graphics
-
1
TrueAudio
-
-
ZeroCore
-
+