GeForce GT 640M and GeForce 830M - video card comparison
Passmark - benchmark score GeForce GT 640M vs GeForce 830M
GeForce GT 640M
943
GeForce 830M
1038
GeForce GT 640M
GeForce 830M
Architecture
Kepler (2012−2018)
Maxwell (2014−2018)
GPU code name
N13P-GS
N15?
Market segment
Laptop
Laptop
Release date
March 2012
March 2014
Bus support
PCI Express 2.0, PCI Express 3.0
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Boost clock speed
645 MHz
1150 MHz
Core clock speed
Up to 625 MHz
1029 MHz
CUDA cores
384
-
Floating-point performance
480.0 gflops
588.8 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
-
Pipelines / CUDA cores
384
256
Power consumption (TDP)
32 Watt
33 Watt
Texture fill rate
Up to 20.0 billion/sec
18.40
Memory type
DDR3\GDDR5
DDR3
Maximum RAM amount
2 GB
2 GB
Memory bus width
128bit
64 Bit
Memory clock speed
1800 - 4000 MHz
1800 MHz
Memory bandwidth
Up to 64.0 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_0)
CUDA
+
+
OpenCL
1.1
1.2
OpenGL
4.5
4.5
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1.126
3D Blu-Ray
+
-
GameWorks
-
+
GPU Boost
-
2.0
Optimus
+
+