Radeon R7 M270 and GeForce GT 640M LE - video card comparison
Passmark - benchmark score Radeon R7 M270 vs GeForce GT 640M LE
Radeon R7 M270
789
GeForce GT 640M LE
720
Radeon R7 M270
GeForce GT 640M LE
Architecture
GCN (2011−2017)
Fermi / Kepler (2012)
GPU code name
Opal XT / Mars
N13P-LP
Market segment
Laptop
Laptop
Release date
January 2014
March 2012
Bus support
PCIe 3.0
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x8
PCIe 2.0 x16
Core clock speed
825 MHz
Up to 500 MHz
CUDA cores
-
Up to 384
Floating-point performance
633.6 gflops
384.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
950 million
585 million
Pipelines / CUDA cores
384
384
Power consumption (TDP)
-
20 Watt
Texture fill rate
19.80
Up to 16.0 billion/sec
Memory type
Not Listed
DDR3\DDR5
Maximum RAM amount
0 MB
2 GB
Memory bus width
Not Listed
128bit
Memory clock speed
-
1800 - 4000 MHz
Memory bandwidth
28.8 GB/s
Up to 28.8 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
HDMI
-
+
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
DirectX
DirectX® 11
12 API
CUDA
-
+
Mantle
+
-
OpenCL
Not Listed
1.1
OpenGL
4.4
4.5
Shader Model
5.1
5.1
Vulkan
-
N/A
3D Blu-Ray
-
+
AppAcceleration
-
-
DualGraphics
1
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
Optimus
-
+
PowerTune
+
-
Switchable graphics
1
-
TrueAudio
-
-
ZeroCore
+
-