NVIDIA GeForce RTX 3080 Ti 20 GB vs NVIDIA GeForce GT 640 Rev. 2

VS

NVIDIA GeForce RTX 3080 Ti 20 GB

NVIDIA GeForce GT 640 Rev. 2

We compared two Desktop platform GPUs: 20GB VRAM GeForce RTX 3080 Ti 20 GB and 1024MB VRAM GeForce GT 640 Rev. 2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce RTX 3080 Ti 20 GB 's Advantages

Released 8 years and 8 months late

Boost Clock1665MHz

More VRAM (20GB vs 1024GB)

Larger VRAM bandwidth (760.3GB/s vs 40.06GB/s)

9856 additional rendering cores

NVIDIA GeForce GT 640 Rev. 2 's Advantages

Lower TDP (49W vs 350W)

Score

Benchmark

FP32 (float)

GeForce RTX 3080 Ti 20 GB +4146%

34.1 TFLOPS

GeForce GT 640 Rev. 2

0.803 TFLOPS

GeForce RTX 3080 Ti 20 GB

VS

GeForce GT 640 Rev. 2

Graphics Card

Jan 2022

Release Date

May 2013

GeForce 30

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 2.0 x8

Clock Speeds

1335 MHz

Base Clock

-

1665 MHz

Boost Clock

-

1188 MHz

Memory Clock

1252 MHz

Memory

20GB

Memory Size

1024MB

GDDR6X

Memory Type

GDDR5

320bit

Memory Bus

64bit

760.3GB/s

Bandwidth

40.06GB/s

Render Config

-

80

SM Count

-

10240

Shading Units

384

320

TMUs

32

112

ROPs

8

320

Tensor Cores

-

80

RT Cores

-

128 KB (per SM)

L1 Cache

16 KB (per SMX)

6 MB

L2 Cache

512 KB

-

Theoretical Performance

186.5 GPixel/s

Pixel Rate

8.368 GPixel/s

532.8 GTexel/s

Texture Rate

33.47 GTexel/s

34.10 TFLOPS

FP16 (half)

-

34.10 TFLOPS

FP32 (float)

803.3 GFLOPS

532.8 GFLOPS

FP64 (double)

33.47 GFLOPS

Board Design

350W

TDP

49W

750 W

Suggested PSU

200 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

1x DVI 1x HDMI 1.4a 1x VGA

1x 12-pin

Power Connectors

None

Graphics Processor

GA102

GPU Name

GK208

GA102-225-A1

GPU Variant

GK208-400-A1

Ampere

Architecture

Kepler 2.0

Samsung

Foundry

TSMC

8 nm

Process Size

28 nm

28.3 billion

Transistors

1.02 billion

628 mm²

Die Size

87 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.3

Vulkan

1.1

8.6

CUDA

3.5

6.6

Shader Model

5.1

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