NVIDIA GeForce RTX 3080 Ti vs NVIDIA GeForce GT 645 OEM

VS

NVIDIA GeForce RTX 3080 Ti

NVIDIA GeForce GT 645 OEM

We compared two Desktop platform GPUs: 12GB VRAM GeForce RTX 3080 Ti 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 3080 Ti 's Advantages

Released 9 years and 1 months late

Boost Clock1665MHz

More VRAM (12GB vs 1024GB)

Larger VRAM bandwidth (912.4GB/s vs 91.87GB/s)

9952 additional rendering cores

NVIDIA GeForce GT 645 OEM 's Advantages

Lower TDP (102W vs 350W)

Score

Benchmark

FP32 (float)

GeForce RTX 3080 Ti +3714%

34.1 TFLOPS

GeForce GT 645 OEM

0.894 TFLOPS

GeForce RTX 3080 Ti

VS

GeForce GT 645 OEM

Graphics Card

May 2021

Release Date

Apr 2012

GeForce 30

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

1365 MHz

Base Clock

-

1665 MHz

Boost Clock

-

1188 MHz

Memory Clock

957 MHz

Memory

12GB

Memory Size

1024MB

GDDR6X

Memory Type

GDDR5

384bit

Memory Bus

192bit

912.4GB/s

Bandwidth

91.87GB/s

Render Config

-

80

SM Count

6

10240

Shading Units

288

320

TMUs

48

112

ROPs

24

320

Tensor Cores

-

80

RT Cores

-

128 KB (per SM)

L1 Cache

64 KB (per SM)

6 MB

L2 Cache

384 KB

-

Theoretical Performance

186.5 GPixel/s

Pixel Rate

9.312 GPixel/s

532.8 GTexel/s

Texture Rate

37.25 GTexel/s

34.10 TFLOPS

FP16 (half)

-

34.10 TFLOPS

FP32 (float)

894.0 GFLOPS

532.8 GFLOPS

FP64 (double)

74.50 GFLOPS

Board Design

350W

TDP

102W

750 W

Suggested PSU

300 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

2x DVI 1x mini-HDMI 1.3a

1x 12-pin

Power Connectors

-

Graphics Processor

GA102

GPU Name

GF114

GA102-225-A1

GPU Variant

-

Ampere

Architecture

Fermi 2.0

Samsung

Foundry

TSMC

8 nm

Process Size

40 nm

28.3 billion

Transistors

1.95 billion

628 mm²

Die Size

332 mm²

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

8.6

CUDA

2.1

6.6

Shader Model

5.1

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