Radeon R7 (Carrizo) and GeForce GT 640M LE - video card comparison
Radeon R7 (Carrizo)
GeForce GT 640M LE
Architecture
GCN 1.2/2.0 (2015−2016)
Fermi / Kepler (2012)
GPU code name
Carrizo
N13P-LP
Market segment
Laptop
Laptop
Release date
June 2015
March 2012
Bus support
-
PCI Express 2.0, PCI Express 3.0
Interface
-
PCIe 2.0 x16
Boost clock speed
800 MHz
-
Core clock speed
-
Up to 500 MHz
CUDA cores
-
Up to 384
Floating-point performance
-
384.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2410 Million
585 million
Pipelines / CUDA cores
512
384
Power consumption (TDP)
12-35 Watt
20 Watt
Texture fill rate
-
Up to 16.0 billion/sec
Memory type
-
DDR3\DDR5
Maximum RAM amount
-
2 GB
Memory bus width
64/128 Bit
128bit
Memory clock speed
-
1800 - 4000 MHz
Memory bandwidth
-
Up to 28.8 GB/s
Shared memory
+
-
Display Connectors
-
No outputs
HDMI
-
+
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
DirectX
12 (FL 12_0)
12 API
CUDA
-
+
OpenCL
-
1.1
OpenGL
-
4.5
Shader Model
-
5.1
Vulkan
-
N/A
3D Blu-Ray
-
+
Optimus
-
+