Radeon R9 285 and Radeon R7 M340 - video card comparison
Passmark - benchmark score Radeon R9 285 vs Radeon R7 M340
Radeon R9 285
6880
Radeon R7 M340
679
Radeon R9 285
Radeon R7 M340
Architecture
GCN 3.0 (2014−2017)
GCN (2011−2017)
GPU code name
Tonga
Meso Pro DDR3
Market segment
Desktop
Laptop
Release date
September 2014
June 2015
Bus support
-
PCIe 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Supplementary power connectors
2x 6-pin
None
Boost clock speed
-
1021 MHz
Compute units
-
6
Core clock speed
918 MHz
1021 MHz
Floating-point performance
3,290 gflops
549.1 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
5,000 million
950 million
Pipelines / CUDA cores
1792
320
Power consumption (TDP)
190 Watt
-
Texture fill rate
102.8
17.16
Memory type
GDDR5
DDR3
Maximum RAM amount
2 GB
4 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
5.5 GB/s
1000 MHz
Memory bandwidth
176.0 GB/s
16 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2
No outputs
Eyefinity
-
1
HDMI
+
-
DirectX
12 (12_0)
DirectX® 12
Mantle
-
+
OpenCL
2.1
Not Listed
OpenGL
4.6
4.4
Shader Model
6.5
5.1
Vulkan
1.2.170
+
AppAcceleration
-
-
DualGraphics
-
1
Enduro
-
-
FreeSync
-
1
HD3D
-
+
PowerTune
-
+
Switchable graphics
-
1
TrueAudio
-
-
ZeroCore
-
+