NVIDIA GeForce RTX 5090 vs NVIDIA GeForce GTX 645 OEM

VS

NVIDIA GeForce RTX 5090

NVIDIA GeForce GTX 645 OEM

We compared two Desktop platform GPUs: 32GB VRAM GeForce RTX 5090 and 1024MB VRAM GeForce GTX 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce RTX 5090 's Advantages

Released 11 years and 9 months late

Boost Clock2520MHz

More VRAM (32GB vs 1024GB)

Larger VRAM bandwidth (1.52TB/s vs 64.00GB/s)

21184 additional rendering cores

NVIDIA GeForce GTX 645 OEM 's Advantages

Lower TDP (65W vs 500W)

Score

Benchmark

FP32 (float)

GeForce RTX 5090 +11459%

109.7 TFLOPS

GeForce GTX 645 OEM

0.949 TFLOPS

GeForce RTX 5090

VS

GeForce GTX 645 OEM

Graphics Card

Jan 2025

Release Date

Apr 2013

GeForce 50

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 5.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

2235 MHz

Base Clock

-

2520 MHz

Boost Clock

-

1875 MHz

Memory Clock

1000 MHz

Memory

32GB

Memory Size

1024MB

GDDR7

Memory Type

GDDR5

512bit

Memory Bus

128bit

1.52TB/s

Bandwidth

64.00GB/s

Render Config

-

170

SM Count

-

21760

Shading Units

576

680

TMUs

48

192

ROPs

16

680

Tensor Cores

-

170

RT Cores

-

128 KB (per SM)

L1 Cache

16 KB (per SMX)

88 MB

L2 Cache

256 KB

-

Theoretical Performance

483.8 GPixel/s

Pixel Rate

9.888 GPixel/s

1714 GTexel/s

Texture Rate

39.55 GTexel/s

109.7 TFLOPS

FP16 (half)

-

109.7 TFLOPS

FP32 (float)

949.2 GFLOPS

1.714 TFLOPS

FP64 (double)

39.55 GFLOPS

Board Design

500W

TDP

65W

900 W

Suggested PSU

250 W

1x HDMI 2.1 3x DisplayPort 2.1a

Outputs

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

1x 16-pin

Power Connectors

None

Graphics Processor

GB202

GPU Name

GK106

GB202-400-A1

GPU Variant

GK106-200-A1

Blackwell 2.0

Architecture

Kepler

TSMC

Foundry

TSMC

4 nm

Process Size

28 nm

Unknown

Transistors

2.54 billion

Unknown

Die Size

221 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

10.1

CUDA

3.0

6.8

Shader Model

5.1

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