GeForce GT 640 OEM Rebrand
General
ManufacturerNVIDIA
SeriesGeForce 600
GPU NameGF116
ArchitectureFermi 2.0
GenerationGeForce 600
Release DateApr 2012
Bus InterfacePCIe 2.0 x16
Process & Die
FoundryTSMC
Process Size40 nm
Transistors1,170 M
Transistor Density4,900 K/mm²
Die Size238 mm²
Chip PackageBGA-1337
Clock Speeds
Base Clock720 MHz
Boost Clock720 MHz
Memory
VRAM1.5 GB
Memory TypeDDR3
Memory Clock800 MHz
Memory Bus192-bit
Bandwidth38.4 GB/s
Processing Units
Shading Units144
TMUs24
ROPs24
SMs3
Tensor Cores0
RT Cores0
Cache
L1 Cache64 KB
L2 Cache0.384 MB
Power & Thermals
TDP75 W
Suggested PSU250 W
Power ConnectorsNone
Dimensions
Board Length145 mm
Outputs
Display Connectors2x DVI, 1x mini-HDMI 1.3a
API Support
DirectX11.0
OpenGL4.6
OpenCL1.1
CUDA2.1
Shader Model5.1
Theoretical Performance
Pixel Rate4.32 GP/s
Texture Rate17.28 GT/s
FP32 (Single)414.7 GFLOPS
FP64 (Double)34.56 GFLOPS
External
TechPowerUpView →
Other GeForce 600 Models
GeForce 605 OEM
0.5 GB523 MHz25 W
GeForce 615 OEM1 GB660 MHz49 W
GeForce GT 6101 GB810 MHz29 W
GeForce GT 610 OEM2 GB701 MHz29 W
GeForce GT 610 PCI0.5 GB810 MHz29 W
GeForce GT 610 PCIe x10.5 GB810 MHz29 W
GeForce GT 6201 GB700 MHz49 W
GeForce GT 620 OEM0.5 GB810 MHz30 W
GeForce GT 625 OEM1 GB874 MHz29 W
GeForce GT 6301 GB810 MHz65 W
GeForce GT 630 OEM1 GB875 MHz50 W
GeForce GT 630 Rev. 22 GB902 MHz25 W
GeForce GT 630 Rev. 2 PCIe x82 GB902 MHz25 W
GeForce GT 635 OEM1 GB967 MHz35 W
GeForce GT 6402 GB902 MHz65 W
GeForce GT 640 OEM2 GB797 MHz50 W
GeForce GT 640 Rev. 21 GB1046 MHz49 W
GeForce GT 645 OEM1 GB776 MHz102 W
GeForce GTX 645 OEM1 GB824 MHz65 W
GeForce GTX 6501 GB1058 MHz65 W
GeForce GTX 650 Ti1 GB928 MHz110 W
GeForce GTX 650 Ti Boost2 GB1032 MHz134 W
GeForce GTX 650 Ti OEM2 GB928 MHz110 W
GeForce GTX 6602 GB1032 MHz140 W
GeForce GTX 660 OEM1.5 GB888 MHz130 W
GeForce GTX 660 Rev. 22 GB1032 MHz140 W
GeForce GTX 660 Ti2 GB980 MHz150 W
GeForce GTX 6702 GB980 MHz170 W
GeForce GTX 6802 GB1058 MHz195 W
GeForce GTX 680 Mac Edition2 GB1058 MHz195 W
GeForce GTX 6902 GB1019 MHz300 W