NVIDIA GeForce RTX 3080 Ti Mobile vs NVIDIA GeForce GT 645M

VS

NVIDIA GeForce RTX 3080 Ti Mobile

NVIDIA GeForce GT 645M

We compared two Mobile platform GPUs: 16GB VRAM GeForce RTX 3080 Ti Mobile and 2GB VRAM GeForce GT 645M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce RTX 3080 Ti Mobile 's Advantages

Released 9 years and 3 months late

Boost Clock1260MHz

More VRAM (16GB vs 2GB)

Larger VRAM bandwidth (512.0GB/s vs 28.80GB/s)

7040 additional rendering cores

NVIDIA GeForce GT 645M 's Advantages

Lower TDP (32W vs 115W)

Score

Benchmark

FP32 (float)

GeForce RTX 3080 Ti Mobile +3339%

18.71 TFLOPS

GeForce GT 645M

0.544 TFLOPS

GeForce RTX 3080 Ti Mobile

VS

GeForce GT 645M

Graphics Card

Jan 2022

Release Date

Oct 2012

GeForce 30 Mobile

Generation

GeForce 600M

Mobile

Type

Mobile

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

810 MHz

Base Clock

-

1260 MHz

Boost Clock

-

2000 MHz

Memory Clock

900 MHz

Memory

16GB

Memory Size

2GB

GDDR6

Memory Type

DDR3

256bit

Memory Bus

128bit

512.0GB/s

Bandwidth

28.80GB/s

Render Config

-

58

SM Count

-

7424

Shading Units

384

232

TMUs

32

96

ROPs

16

232

Tensor Cores

-

58

RT Cores

-

128 KB (per SM)

L1 Cache

16 KB (per SMX)

4 MB

L2 Cache

256 KB

-

Theoretical Performance

121.0 GPixel/s

Pixel Rate

5.672 GPixel/s

292.3 GTexel/s

Texture Rate

22.69 GTexel/s

18.71 TFLOPS

FP16 (half)

-

18.71 TFLOPS

FP32 (float)

544.5 GFLOPS

292.3 GFLOPS

FP64 (double)

22.69 GFLOPS

Board Design

115W

TDP

32W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

GA103S

GPU Name

GK107

GN20-E8-A1

GPU Variant

N13P-GS

Ampere

Architecture

Kepler

Samsung

Foundry

TSMC

8 nm

Process Size

28 nm

Unknown

Transistors

1.27 billion

496 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

8.6

CUDA

3.0

6.5

Shader Model

5.1

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