NVIDIA GeForce RTX 4090 vs NVIDIA GeForce GT 640 OEM

VS

NVIDIA GeForce RTX 4090

NVIDIA GeForce GT 640 OEM

We compared two Desktop platform GPUs: 24GB VRAM GeForce RTX 4090 and 2GB VRAM GeForce GT 640 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce RTX 4090 's Advantages

Released 10 years and 5 months late

Boost Clock2520MHz

More VRAM (24GB vs 2GB)

Larger VRAM bandwidth (1.01TB/s vs 28.51GB/s)

16000 additional rendering cores

NVIDIA GeForce GT 640 OEM 's Advantages

Lower TDP (50W vs 450W)

Score

Benchmark

FP32 (float)

GeForce RTX 4090 +13393%

82.58 TFLOPS

GeForce GT 640 OEM

0.612 TFLOPS

GeForce RTX 4090

VS

GeForce GT 640 OEM

Graphics Card

Sep 2022

Release Date

Apr 2012

GeForce 40

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

2235 MHz

Base Clock

-

2520 MHz

Boost Clock

-

1313 MHz

Memory Clock

891 MHz

Memory

24GB

Memory Size

2GB

GDDR6X

Memory Type

DDR3

384bit

Memory Bus

128bit

1.01TB/s

Bandwidth

28.51GB/s

Render Config

-

128

SM Count

-

16384

Shading Units

384

512

TMUs

32

176

ROPs

16

512

Tensor Cores

-

128

RT Cores

-

128 KB (per SM)

L1 Cache

16 KB (per SMX)

72 MB

L2 Cache

256 KB

-

Theoretical Performance

443.5 GPixel/s

Pixel Rate

6.376 GPixel/s

1290 GTexel/s

Texture Rate

25.50 GTexel/s

82.58 TFLOPS

FP16 (half)

-

82.58 TFLOPS

FP32 (float)

612.1 GFLOPS

1290 GFLOPS

FP64 (double)

25.50 GFLOPS

Board Design

450W

TDP

50W

850 W

Suggested PSU

250 W

1x HDMI 2.13x DisplayPort 1.4a

Outputs

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

1x 16-pin

Power Connectors

None

Graphics Processor

AD102

GPU Name

GK107

AD102-300-A1

GPU Variant

GK107-320-A2

Ada Lovelace

Architecture

Kepler

TSMC

Foundry

TSMC

5 nm

Process Size

28 nm

76.3 billion

Transistors

1.27 billion

609 mm²

Die Size

118 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

8.9

CUDA

3.0

6.8

Shader Model

5.1

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