GeForce GT 640M and Radeon 520 Mobile DDR3 - video card comparison
GeForce GT 640M
Radeon 520 Mobile DDR3
Architecture
Kepler (2012−2018)
GCN 1.0 (2012−2020)
GPU code name
N13P-GS
Banks
Market segment
Laptop
Laptop
Release date
March 2012
April 2017
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Boost clock speed
645 MHz
-
Core clock speed
Up to 625 MHz
1030 MHz
CUDA cores
384
-
Floating-point performance
480.0 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
690 million
Pipelines / CUDA cores
384
320
Power consumption (TDP)
32 Watt
50 Watt
Texture fill rate
Up to 20.0 billion/sec
20.60
Memory type
DDR3\GDDR5
DDR3
Maximum RAM amount
2 GB
2 GB
Memory bus width
128bit
64 Bit
Memory clock speed
1800 - 4000 MHz
2 GB/s
Memory bandwidth
Up to 64.0 GB/s
16 GB/s
Shared memory
-
-
Display Connectors
No outputs
Portable Device Dependent
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
12 (11_1)
CUDA
+
-
OpenCL
1.1
2.1 (1.2)
OpenGL
4.5
4.6
Shader Model
5.1
6.5 (5.1)
Vulkan
1.1.126
1.2.170
3D Blu-Ray
+
-
Optimus
+
-