GeForce GT 640 Rev. 2

Kepler 2.0 GeForce 600 Series Desktop GDDR5 2013 NVIDIA

Key Metrics

Launch Date: 2013-05-29
CUDA Cores: 384
Memory: 1 GB GDDR5
Memory Bandwidth: 40.06 GB/s
TDP/TBP: 49 W
Interface: PCIe 2.0 x8

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GPU Specs

Identity
Entry Type	Reference GPU
Official Name	NVIDIA GeForce GT 640 Rev. 2
GPU Codename	GK208
Architecture	Kepler 2.0
Launch Date	2013-05-29
Market Segment Notes	Desktop in GeForce 600 Series
Core Specs
GPU Die	GK208
Chip Variant / Package	FCBGA-595
Process Node	TSMC 28 nm
Transistor Count	1.02 billion
Die Size	87 mm²
CUDA Cores	384
SM Count	0
TMUs	32
ROPs	8
Base Clock	1,046 MHz
Boost Clock	1,046 MHz
Pixel Fillrate	8.368 GP/s
Texture Fillrate	33.47 GT/s
FP32 Throughput	0.8 TFLOPS
FP64 Throughput	0.03 TFLOPS
Memory
Memory Size	1 GB
Memory Type	GDDR5
Memory Bus Width	64-bit
Memory Clock	1,252 MHz
Memory Bandwidth	40.06 GB/s
L2 Cache	MB
L1 Cache	16 KB
Board and Display
TDP / TBP	49 W
Recommended PSU	200 W
Power Connectors	None
Interface	PCIe 2.0 x8
Display Outputs	1x DVI, 1x HDMI 1.4a, 1x VGA
Slot Width	Single-slot, 145 mm length
Card Length	145 mm
Board Partner Model	Reference or OEM specification
Reference Design	NVIDIA reference design
Software
CUDA Compute Capability	3.5
Shader Model	5.1
DirectX Support	DirectX 11.0
Vulkan Support	Vulkan 1.2
OpenGL Support	OpenGL 4.6
OpenCL Support	OpenCL 3.0

Why It Mattered

GeForce GT 640 Rev. 2 belongs to the Kepler 2.0 and GeForce 600 Series era around 2013, when PC graphics cards varied heavily by bus, memory chips, BIOS, cooler, and display outputs. Tracking the exact model helps retro builders distinguish period-correct boards from similarly named variants.

Sources

Independent reference sources

TechPowerUp GPU SpecsModel-level specification reference for this GPU entryOpen source

Reference databases

RightNow GPU DatabaseOpen GPU database used to cross-check specifications A reference database: good for cross-checking specifications, but not proof of the original release details on its own.Open source

Why It Mattered

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Independent reference sources

Reference databases