Radeon R7 M340 and Radeon HD 2900 XT - video card comparison
Passmark - benchmark score Radeon R7 M340 vs Radeon HD 2900 XT
Radeon R7 M340
679
Radeon HD 2900 XT
679
Radeon R7 M340
Radeon HD 2900 XT
Architecture
GCN (2011−2017)
TeraScale (2005−2013)
GPU code name
Meso Pro DDR3
R600
Market segment
Laptop
Desktop
Release date
June 2015
May 2007
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x8
PCIe 1.0 x16
Supplementary power connectors
None
1x 6-pin + 1x 8-pin
Boost clock speed
1021 MHz
-
Compute units
6
-
Core clock speed
1021 MHz
743 MHz
Floating-point performance
549.1 gflops
475.5 gflops
Manufacturing process technology
28 nm
80 nm
Number of transistors
950 million
720 million
Pipelines / CUDA cores
320
320
Power consumption (TDP)
-
215 Watt
Texture fill rate
17.16
11.89
Memory type
DDR3
GDDR3
Maximum RAM amount
4 GB
512 MB
Memory bus width
128 Bit
512 Bit
Memory clock speed
1000 MHz
1656 MHz
Memory bandwidth
16 GB/s
106.0 GB/s
Shared memory
-
-
Display Connectors
No outputs
2x DVI, 1x S-Video
Eyefinity
1
-
DirectX
DirectX® 12
10.0 (10_0)
Mantle
+
-
OpenCL
Not Listed
N/A
OpenGL
4.4
3.3
Shader Model
5.1
4.0
Vulkan
+
N/A
AppAcceleration
-
-
DualGraphics
1
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
PowerTune
+
-
Switchable graphics
1
-
TrueAudio
-
-
ZeroCore
+
-