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GeForce GT 640

General
ManufacturerNVIDIA
SeriesGeForce 600
GPU NameGK107
ArchitectureKepler
GenerationGeForce 600
Release DateJun 2012
Bus InterfacePCIe 3.0 x16
Process & Die
FoundryTSMC
Process Size28 nm
Transistors1,270 M
Transistor Density10,800 K/mm²
Die Size118 mm²
Chip PackageBGA-908
Clock Speeds
Base Clock902 MHz
Boost Clock902 MHz
Memory
VRAM2 GB
Memory TypeDDR3
Memory Clock891 MHz
Memory Bus128-bit
Bandwidth28.51 GB/s
Processing Units
Shading Units384
TMUs32
ROPs16
SMs0
Tensor Cores0
RT Cores0
Cache
L1 Cache16 KB
L2 Cache0.25 MB
Power & Thermals
TDP65 W
Suggested PSU250 W
Power ConnectorsNone
Dimensions
Board Length145 mm
Outputs
Display Connectors1x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2
API Support
DirectX11.0
OpenGL4.6
Vulkan1.2
OpenCL3.0
CUDA3.0
Shader Model5.1
Theoretical Performance
Pixel Rate7.216 GP/s
Texture Rate28.86 GT/s
FP32 (Single)692.7 GFLOPS
FP64 (Double)28.86 GFLOPS
External
TechPowerUpView →
Other GeForce 600 Models
GeForce 605 OEM
0.5 GB523 MHz25 W
GeForce 615 OEM
1 GB660 MHz49 W
GeForce GT 610
1 GB810 MHz29 W
GeForce GT 610 OEM
2 GB701 MHz29 W
GeForce GT 610 PCI
0.5 GB810 MHz29 W
GeForce GT 610 PCIe x1
0.5 GB810 MHz29 W
GeForce GT 620
1 GB700 MHz49 W
GeForce GT 620 OEM
0.5 GB810 MHz30 W
GeForce GT 625 OEM
1 GB874 MHz29 W
GeForce GT 630
1 GB810 MHz65 W
GeForce GT 630 OEM
1 GB875 MHz50 W
GeForce GT 630 Rev. 2
2 GB902 MHz25 W
GeForce GT 630 Rev. 2 PCIe x8
2 GB902 MHz25 W
GeForce GT 635 OEM
1 GB967 MHz35 W
GeForce GT 640 OEM
2 GB797 MHz50 W
GeForce GT 640 OEM Rebrand
1.5 GB720 MHz75 W
GeForce GT 640 Rev. 2
1 GB1046 MHz49 W
GeForce GT 645 OEM
1 GB776 MHz102 W
GeForce GTX 645 OEM
1 GB824 MHz65 W
GeForce GTX 650
1 GB1058 MHz65 W
GeForce GTX 650 Ti
1 GB928 MHz110 W
GeForce GTX 650 Ti Boost
2 GB1032 MHz134 W
GeForce GTX 650 Ti OEM
2 GB928 MHz110 W
GeForce GTX 660
2 GB1032 MHz140 W
GeForce GTX 660 OEM
1.5 GB888 MHz130 W
GeForce GTX 660 Rev. 2
2 GB1032 MHz140 W
GeForce GTX 660 Ti
2 GB980 MHz150 W
GeForce GTX 670
2 GB980 MHz170 W
GeForce GTX 680
2 GB1058 MHz195 W
GeForce GTX 680 Mac Edition
2 GB1058 MHz195 W
GeForce GTX 690
2 GB1019 MHz300 W