NVIDIA GeForce GT 640 GK208 Full Specs

Summary

384 Shaders 1.05GHz

1GB GDDR540.1GB/s

Peak·FP32·FP16 803.3 GFLOPS

Form Factor PCIe Card

TDP 49W

Theoretical Performance

Clock Speed1046MHz UC·Boost·OC

Peak OPS 803.3 GFLOPSFP32

FP32 803.3 GFLOPS

FP64 33.47 GFLOPS

Pixel Rate 8.4 GPixel/s

Texture Rate 16.7 GTexel/s

Core Config

Shaders 384 Shaders

TMUs 16 TMUs

ROPs 8 ROPs

SMs 2 SMs

Clocks

Boost Clock 1.05GHz

Cache

L1 48KB/SM Tex

L2 Cache 256KB shared

Memory

1GB GDDR5

Memory Bus 64-bit

Memory Speed 5GT/s

Memory Bandwidth 40.1GB/s

ECC No

Power & Thermals

TDP 49W

Video Output

Max Resolution 4096x2304

Refresh Rate Calculator 3840x2160 Resolution4K UHD Refresh Rate 34Hz

Multi-Monitor 2

Adaptive Sync G-Sync FreeSync

DSC Not Supported

Ports

1x HDMI 1.4 1x DVI-I Dual-Link 1x VGA

API Support

Shader Model 6.5

DirectX DirectX 12 Direct3D 11_0

OpenGL 4.6 OpenCL 3 Vulkan 1.2

CUDA 3.5 PureVideo HD VP5 VDPAU Feature Set D

Decoder

Decoder NVDEC 1

Codec MPEG-1 MPEG-2 MPEG-4 VC-1 AVC (H.264)

Card

Form Factor PCIe Card

PCIe PCIe 3.0 x16 1.5-Slots

Height 111mm (4.37") Width 145mm (5.71") Depth 30mm (1.18")

Cooling Open-Air 1x Fan

Chip

Manufacturer NVIDIA

Chip Designer NVIDIA

Architecture Kepler 2

Family GeForce 600

Branding

Codename NV108

Chip Variant GK208-301-A1

Market Segment Desktop

Release Date May 29, 2013

Fabrication

Foundry TSMC

Fabrication Node 28nm

Die Size 79mm²

Transistor Count 1B

Transistor Density 12.91 MTr/mm²

Images