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Spec GeForce GT 640 OEM Rebrand
Overview
Product name NVIDIA GeForce GT 640 OEM Rebrand
Architecture Fermi 2.0
Generation / family GeForce 600 Series
GPU codename GF116
Launch date 2012-04-24
Market segment Desktop, OEM in GeForce 600 Series
Board type / entry type Reference GPU
GPU
Process node TSMC 40 nm
Die size 238 mm²
Transistor count 1.17 billion
GPU chip GF116
SM / multiprocessor count 3
CUDA Cores 144
ROPs 24
TMUs 24
Clocks
Base / Core clock 720 MHz
Boost clock 720 MHz
Memory clock 800 MHz
Memory
Memory size 1.5 GB
Memory type DDR3
Memory bus width 192-bit
Memory bandwidth 38.4 GB/s
Bus / Interface
Bus interface PCIe 2.0 x16
AGP / PCI / PCIe distinction PCIe
Power
TDP / TBP / board power 75 W
Recommended PSU 250 W
Power connectors None
Slot width Single-slot, 145 mm length
Display / Media
Display outputs 2x DVI, 1x mini-HDMI 1.3a
Features
DirectX support DirectX 11.0
OpenGL support OpenGL 4.6
CUDA support 2.1
Shader Model 5.1
Performance / Benchmarks
FP32 throughput 0.41 TFLOPS

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