GeForce GT 640M and Radeon R7 M270 - video card comparison
Passmark - benchmark score GeForce GT 640M vs Radeon R7 M270
GeForce GT 640M
943
Radeon R7 M270
789
GeForce GT 640M
Radeon R7 M270
Architecture
Kepler (2012−2018)
GCN (2011−2017)
GPU code name
N13P-GS
Opal XT / Mars
Market segment
Laptop
Laptop
Release date
March 2012
January 2014
Bus support
PCI Express 2.0, PCI Express 3.0
PCIe 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Boost clock speed
645 MHz
-
Core clock speed
Up to 625 MHz
825 MHz
CUDA cores
384
-
Floating-point performance
480.0 gflops
633.6 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
950 million
Pipelines / CUDA cores
384
384
Power consumption (TDP)
32 Watt
-
Texture fill rate
Up to 20.0 billion/sec
19.80
Memory type
DDR3\GDDR5
Not Listed
Maximum RAM amount
2 GB
0 MB
Memory bus width
128bit
Not Listed
Memory clock speed
1800 - 4000 MHz
-
Memory bandwidth
Up to 64.0 GB/s
28.8 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
DirectX® 11
CUDA
+
-
Mantle
-
+
OpenCL
1.1
Not Listed
OpenGL
4.5
4.4
Shader Model
5.1
5.1
Vulkan
1.1.126
-
3D Blu-Ray
+
-
AppAcceleration
-
-
DualGraphics
-
1
Enduro
-
-
FreeSync
-
1
HD3D
-
+
Optimus
+
-
PowerTune
-
+
Switchable graphics
-
1
TrueAudio
-
-
ZeroCore
-
+