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NVIDIA GeForce GT 640 OEM Image NVIDIA GK107 Image
The GeForce GT 640 OEM is a graphics card by NVIDIA, launched in April 2012. Built on the 28 nm process, and based on the GK107 graphics processor, in its GK107-300-A2 variant, the card supports DirectX 11.2. The GK107 graphics processor is an average sized chip with a die area of 118 mm² and 1,270 million transistors. It features 384 shading units, 32 texture mapping units and 16 ROPs. NVIDIA has placed 2,048 MB DDR3 memory on the card, which are connected using a 128-bit memory interface. The GPU is operating at a frequency of 797 MHz, memory is running at 891 MHz.
We recommend the NVIDIA GeForce GT 640 OEM for gaming with highest details at resolutions up to, and including, 1024x768.
Being a single-slot card, the NVIDIA GeForce GT 640 OEM does not require any additional power connector, its power draw is rated at 50 W maximum. Display outputs include: 1x DVI, 1x HDMI, 1x DisplayPort. GeForce GT 640 OEM is connected to the rest of the system using a PCIe 3.0 x16 interface. The card measures 145 mm in length, and features a single-slot cooling solution.

Graphics Processor

GPU Name: GK107
GPU Variant: GK107-300-A2
Architecture: Kepler
Process Size: 28 nm
Transistors: 1,270 million
Die Size: 118 mm²

Graphics Card

Released: Apr 24th, 2012
Production Status: Active
Bus Interface: PCIe 3.0 x16

Clock Speeds

GPU Clock: 797 MHz
Memory Clock: 891 MHz
1782 MHz effective


Memory Size: 2048 MB
Memory Type: DDR3
Memory Bus: 128 bit
Bandwidth: 28.51 GB/s

Render Config

Shading Units: 384
TMUs: 32
ROPs: 16
SMX Count: 2
Pixel Rate: 6.38 GPixel/s
Texture Rate: 25.50 GTexel/s
Floating-point performance: 612.1 GFLOPS

Board Design

Slot Width: Single-slot
Length: 5.7 inches
145 mm
TDP: 50 W
Outputs: 1x DVI
1x DisplayPort
Power Connectors: None
Board Number: P2010

Graphics Features

DirectX: 11.2
OpenGL: 4.5
OpenCL: 1.2
CUDA: 3.0
Shader Model: 5.0


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Card Notes

DPUs: 128
SFUs: 64

Variant Memory: 4096MB DDR3
Variant Memory: 1024MB GDDR5

Retail boards based on this design

Name GPU Clock Memory Clock Other Changes
NVIDIA GeForce GT 640 OEM 1 GB 954 MHz 1250 MHz 1024 MB, GDDR5
NVIDIA GeForce GT 640 OEM 2 GB 797 MHz 891 MHz 2048 MB