NVIDIA GeForce GT 640 vs NVIDIA GeForce GTX 1080

VS

NVIDIA GeForce GT 640

NVIDIA GeForce GTX 1080

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 8GB VRAM GeForce GTX 1080 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

Lower TDP (65W vs 180W)

NVIDIA GeForce GTX 1080 's Advantages

Released 3 years and 11 months late

Boost Clock1733MHz

More VRAM (8GB vs 2GB)

Larger VRAM bandwidth (320.3GB/s vs 28.51GB/s)

2176 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

GeForce GTX 1080 +1180%

8.873 TFLOPS

GeForce GT 640

VS

GeForce GTX 1080

Graphics Card

Jun 2012

Release Date

May 2016

GeForce 600

Generation

GeForce 10

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

1607 MHz

-

Boost Clock

1733 MHz

891 MHz

Memory Clock

1251 MHz

Memory

2GB

Memory Size

8GB

DDR3

Memory Type

GDDR5X

128bit

Memory Bus

256bit

28.51GB/s

Bandwidth

320.3GB/s

Render Config

-

SM Count

20

384

Shading Units

2560

32

TMUs

160

16

ROPs

64

-

16 KB (per SMX)

L1 Cache

48 KB (per SM)

256 KB

L2 Cache

2 MB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

110.9 GPixel/s

28.86 GTexel/s

Texture Rate

277.3 GTexel/s

-

FP16 (half)

138.6 GFLOPS

692.7 GFLOPS

FP32 (float)

8.873 TFLOPS

28.86 GFLOPS

FP64 (double)

277.3 GFLOPS

Board Design

65W

TDP

180W

250 W

Suggested PSU

450 W

1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

Outputs

1x DVI 1x HDMI 2.0 3x DisplayPort 1.4a

None

Power Connectors

1x 8-pin

Graphics Processor

GK107

GPU Name

GP104

GK107-300-A2

GPU Variant

GP104-400-A1

Kepler

Architecture

Pascal

TSMC

Foundry

TSMC

28 nm

Process Size

16 nm

1.27 billion

Transistors

7.2 billion

118 mm²

Die Size

314 mm²

Graphics Features

12 (11_0)

DirectX

12 (12_1)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.3

3.0

CUDA

6.1

5.1

Shader Model

6.4

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