GeForce GT 640M LE and Radeon HD 8550M - video card comparison
GeForce GT 640M LE
Radeon HD 8550M
Architecture
Fermi / Kepler (2012)
GCN (2011−2017)
GPU code name
N13P-LP
Sun
Market segment
Laptop
Laptop
Release date
March 2012
November 2012
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
PCIe 2.0 x16
PCIe 3.0 x8
Boost clock speed
-
850 MHz
Core clock speed
Up to 500 MHz
700 MHz
CUDA cores
Up to 384
-
Floating-point performance
384.0 gflops
544.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
585 million
690 million
Pipelines / CUDA cores
384
384
Power consumption (TDP)
20 Watt
-
Texture fill rate
Up to 16.0 billion/sec
17.00
Memory type
DDR3\DDR5
DDR3
Maximum RAM amount
2 GB
1 GB
Memory bus width
128bit
64 Bit
Memory clock speed
1800 - 4000 MHz
1800 MHz
Memory bandwidth
Up to 28.8 GB/s
14.4 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
12 (11_1)
CUDA
+
-
OpenCL
1.1
1.2
OpenGL
4.5
4.6
Shader Model
5.1
5.1
Vulkan
N/A
1.2.131
3D Blu-Ray
+
-
Optimus
+
-