NVIDIA GeForce GT 640 vs NVIDIA GeForce RTX 2080

VS

NVIDIA GeForce GT 640

NVIDIA GeForce RTX 2080

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 8GB VRAM GeForce RTX 2080 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 215W)

NVIDIA GeForce RTX 2080 's Advantages

Released 6 years and 3 months late

Boost Clock1710MHz

More VRAM (8GB vs 2GB)

Larger VRAM bandwidth (448.0GB/s vs 28.51GB/s)

2560 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

GeForce RTX 2080 +1353%

10.07 TFLOPS

GeForce GT 640

VS

GeForce RTX 2080

Graphics Card

Jun 2012

Release Date

Sep 2018

GeForce 600

Generation

GeForce 20

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

1515 MHz

-

Boost Clock

1710 MHz

891 MHz

Memory Clock

1750 MHz

Memory

2GB

Memory Size

8GB

DDR3

Memory Type

GDDR6

128bit

Memory Bus

256bit

28.51GB/s

Bandwidth

448.0GB/s

Render Config

-

SM Count

46

384

Shading Units

2944

32

TMUs

184

16

ROPs

64

-

Tensor Cores

368

-

RT Cores

46

16 KB (per SMX)

L1 Cache

64 KB (per SM)

256 KB

L2 Cache

4 MB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

109.4 GPixel/s

28.86 GTexel/s

Texture Rate

314.6 GTexel/s

-

FP16 (half)

20.14 TFLOPS

692.7 GFLOPS

FP32 (float)

10.07 TFLOPS

28.86 GFLOPS

FP64 (double)

314.6 GFLOPS

Board Design

65W

TDP

215W

250 W

Suggested PSU

550 W

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

Outputs

1x HDMI 2.0 3x DisplayPort 1.4a 1x USB Type-C

None

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

GK107

GPU Name

TU104

GK107-300-A2

GPU Variant

TU104-400A-A1

Kepler

Architecture

Turing

TSMC

Foundry

TSMC

28 nm

Process Size

12 nm

1.27 billion

Transistors

13.6 billion

118 mm²

Die Size

545 mm²

Graphics Features

12 (11_0)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.3

3.0

CUDA

7.5

5.1

Shader Model

6.6

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