GeForce GTX 660M and Radeon R7 M340 - video card comparison
Passmark - benchmark score GeForce GTX 660M vs Radeon R7 M340
GeForce GTX 660M
1478
Radeon R7 M340
679
GeForce GTX 660M
Radeon R7 M340
Architecture
Kepler (2012−2018)
GCN (2011−2017)
GPU code name
N13E-GE
Meso Pro DDR3
Market segment
Laptop
Laptop
Release date
March 2012
June 2015
Bus support
PCI Express 2.0, PCI Express 3.0
PCIe 3.0
Interface
MXM-B (3.0)
PCIe 3.0 x8
Supplementary power connectors
-
None
SLI options
+
-
Boost clock speed
950 MHz
1021 MHz
Compute units
-
6
Core clock speed
835 MHz
1021 MHz
CUDA cores
384
-
Floating-point performance
729.6 gflops
549.1 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
950 million
Pipelines / CUDA cores
384
320
Power consumption (TDP)
50 Watt
-
Texture fill rate
30.4 billion/sec
17.16
Memory type
GDDR5
DDR3
Maximum RAM amount
2 GB
4 GB
Memory bus width
128bit
128 Bit
Memory clock speed
2000 MHz
1000 MHz
Memory bandwidth
64.0 GB/s
16 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
Eyefinity
-
1
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
DirectX® 12
CUDA
+
-
Mantle
-
+
OpenCL
1.1
Not Listed
OpenGL
4.5
4.4
Shader Model
5.1
5.1
Vulkan
1.1.126
+
AppAcceleration
-
-
DualGraphics
-
1
Enduro
-
-
FreeSync
-
1
HD3D
-
+
Optimus
+
-
PowerTune
-
+
Switchable graphics
-
1
TrueAudio
-
-
ZeroCore
-
+