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Spec GeForce GT 640M LE
Overview
Product name NVIDIA GeForce GT 640M LE
Architecture Kepler
Generation / family GeForce 600 Series
GPU codename GK107
Launch date 2012-03-22
Market segment Laptop in GeForce 600 Series
Board type / entry type Laptop GPU
GPU
Process node TSMC 28 nm
Die size 118 mm²
Transistor count 1.27 billion
GPU chip GK107
SM / multiprocessor count 0
CUDA Cores 384
ROPs 16
TMUs 32
Clocks
Base / Core clock 500 MHz
Boost clock 570 MHz
Memory clock 900 MHz
Memory
Memory size 1 GB
Memory type DDR3
Memory bus width 128-bit
Memory bandwidth 28.8 GB/s
Bus / Interface
Bus interface PCIe 3.0 x16
AGP / PCI / PCIe distinction PCIe
Power
TDP / TBP / board power 20 W
Power connectors None
Slot width IGP
Features
DirectX support DirectX 11.0
OpenGL support OpenGL 4.6
Vulkan support Vulkan 1.2
CUDA support 3.0
Shader Model 5.1
Performance / Benchmarks
FP32 throughput 0.44 TFLOPS

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