GeForce GT 640M LE and Mobility Radeon HD 4830 - video card comparison
GeForce GT 640M LE
Mobility Radeon HD 4830
Architecture
Fermi / Kepler (2012)
Terascale 1 (2008−2010)
GPU code name
N13P-LP
M97
Market segment
Laptop
Laptop
Release date
March 2012
March 2009
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Core clock speed
Up to 500 MHz
550 MHz
CUDA cores
Up to 384
-
Floating-point performance
384.0 gflops
704.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
585 million
826 million
Pipelines / CUDA cores
384
640
Power consumption (TDP)
20 Watt
-
Texture fill rate
Up to 16.0 billion/sec
17.60
Memory type
DDR3\DDR5
GDDR3, DDR3
Maximum RAM amount
2 GB
1 GB
Memory bus width
128bit
128 Bit
Memory clock speed
1800 - 4000 MHz
700 MHz
Memory bandwidth
Up to 28.8 GB/s
44.8 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
10.1 (10_1)
CUDA
+
-
OpenCL
1.1
1.1
OpenGL
4.5
3.3
Shader Model
5.1
4.1
Vulkan
N/A
N/A
3D Blu-Ray
+
-
Optimus
+
-