NVIDIA GeForce RTX 4080 vs NVIDIA GeForce GT 645 OEM

VS

NVIDIA GeForce RTX 4080 NVIDIA GeForce GT 645 OEM

We compared two Desktop platform GPUs: 16GB VRAM GeForce RTX 4080 and 1024MB VRAM GeForce GT 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce RTX 4080 's Advantages

Released 10 years and 5 months late

Boost Clock2505MHz

More VRAM (16GB vs 1GB)

Larger VRAM bandwidth (716.8GB/s vs 91.87GB/s)

9440 additional rendering cores

NVIDIA GeForce GT 645 OEM 's Advantages

Lower TDP (102W vs 320W)

Score

Benchmark

FP32 (float)

GeForce RTX 4080 +5351%

48.74 TFLOPS

GeForce GT 645 OEM

0.894 TFLOPS

GeForce RTX 4080

VS

GeForce GT 645 OEM

Graphics Card

Sep 2022

Release Date

Apr 2012

GeForce 40

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

2205 MHz

Base Clock

-

2505 MHz

Boost Clock

-

1400 MHz

Memory Clock

957 MHz

Memory

16GB

Memory Size

1024MB

GDDR6X

Memory Type

GDDR5

256bit

Memory Bus

192bit

716.8GB/s

Bandwidth

91.87GB/s

Render Config

76

SM Count

6

-

Compute Units

-

9728

Shading Units

288

304

TMUs

48

112

ROPs

24

304

Tensor Cores

-

76

RT Cores

-

128 KB (per SM)

L1 Cache

64 KB (per SM)

64 MB

L2 Cache

384 KB

Theoretical Performance

280.6 GPixel/s

Pixel Rate

9.312 GPixel/s

761.5 GTexel/s

Texture Rate

37.25 GTexel/s

48.74 TFLOPS

FP16 (half)

-

48.74 TFLOPS

FP32 (float)

894.0 GFLOPS

761.5 GFLOPS

FP64 (double)

74.50 GFLOPS

Graphics Processor

AD103

GPU Name

GF114

AD103-300-A1

GPU Variant

-

Ada Lovelace

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

5 nm

Process Size

40 nm

45.9 billion

Transistors

1.95 billion

379 mm²

Die Size

332 mm²

Board Design

320W

TDP

102W

700 W

Suggested PSU

300 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

2x DVI 1x mini-HDMI 1.3a

1x 16-pin

Power Connectors

-

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

1.1

1.3

Vulkan

N/A

8.9

CUDA

2.1

6.7

Shader Model

5.1

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