NVIDIA GeForce RTX 2080 vs NVIDIA GeForce GT 640

VS

NVIDIA GeForce RTX 2080 NVIDIA GeForce GT 640

We compared two Desktop platform GPUs: 8GB VRAM GeForce RTX 2080 and 2GB VRAM GeForce GT 640 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

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

NVIDIA GeForce GT 640 's Advantages

Lower TDP (65W vs 215W)

Score

Benchmark

FP32 (float)

GeForce RTX 2080 +1353%

10.07 TFLOPS

GeForce GT 640

0.693 TFLOPS

GeForce RTX 2080

VS

GeForce GT 640

Graphics Card

Sep 2018

Release Date

Jun 2012

GeForce 20

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1515 MHz

Base Clock

-

1710 MHz

Boost Clock

-

1750 MHz

Memory Clock

891 MHz

Memory

8GB

Memory Size

2GB

GDDR6

Memory Type

DDR3

256bit

Memory Bus

128bit

448.0GB/s

Bandwidth

28.51GB/s

Render Config

46

SM Count

-

Compute Units

-

2944

Shading Units

384

184

TMUs

32

64

ROPs

16

368

Tensor Cores

-

46

RT Cores

-

64 KB (per SM)

L1 Cache

16 KB (per SMX)

4 MB

L2 Cache

256 KB

Theoretical Performance

109.4 GPixel/s

Pixel Rate

7.216 GPixel/s

314.6 GTexel/s

Texture Rate

28.86 GTexel/s

20.14 TFLOPS

FP16 (half)

-

10.07 TFLOPS

FP32 (float)

692.7 GFLOPS

314.6 GFLOPS

FP64 (double)

28.86 GFLOPS

Graphics Processor

TU104

GPU Name

GK107

TU104-400A-A1

GPU Variant

GK107-300-A2

Turing

Architecture

Kepler

TSMC

Foundry

TSMC

12 nm

Process Size

28 nm

13.6 billion

Transistors

1.27 billion

545 mm²

Die Size

118 mm²

Board Design

215W

TDP

65W

550 W

Suggested PSU

250 W

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

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

None

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

7.5

CUDA

3.0

6.6

Shader Model

5.1

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