NVIDIA GeForce RTX 3080 12 GB vs NVIDIA GeForce GTX 645 OEM

VS

NVIDIA GeForce RTX 3080 12 GB

NVIDIA GeForce GTX 645 OEM

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

Released 8 years and 9 months late

Boost Clock1710MHz

More VRAM (12GB vs 1024GB)

Larger VRAM bandwidth (912.4GB/s vs 64.00GB/s)

8384 additional rendering cores

NVIDIA GeForce GTX 645 OEM 's Advantages

Lower TDP (65W vs 350W)

Score

Benchmark

FP32 (float)

GeForce RTX 3080 12 GB +3128%

30.64 TFLOPS

GeForce GTX 645 OEM

0.949 TFLOPS

GeForce RTX 3080 12 GB

VS

GeForce GTX 645 OEM

Graphics Card

Jan 2022

Release Date

Apr 2013

GeForce 30

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1260 MHz

Base Clock

-

1710 MHz

Boost Clock

-

1188 MHz

Memory Clock

1000 MHz

Memory

12GB

Memory Size

1024MB

GDDR6X

Memory Type

GDDR5

384bit

Memory Bus

128bit

912.4GB/s

Bandwidth

64.00GB/s

Render Config

-

70

SM Count

-

8960

Shading Units

576

280

TMUs

48

96

ROPs

16

280

Tensor Cores

-

70

RT Cores

-

128 KB (per SM)

L1 Cache

16 KB (per SMX)

5 MB

L2 Cache

256 KB

-

Theoretical Performance

164.2 GPixel/s

Pixel Rate

9.888 GPixel/s

478.8 GTexel/s

Texture Rate

39.55 GTexel/s

30.64 TFLOPS

FP16 (half)

-

30.64 TFLOPS

FP32 (float)

949.2 GFLOPS

478.8 GFLOPS

FP64 (double)

39.55 GFLOPS

Board Design

350W

TDP

65W

750 W

Suggested PSU

250 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

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

1x 12-pin

Power Connectors

None

Graphics Processor

GA102

GPU Name

GK106

GA102-220-A1

GPU Variant

GK106-200-A1

Ampere

Architecture

Kepler

Samsung

Foundry

TSMC

8 nm

Process Size

28 nm

28.3 billion

Transistors

2.54 billion

628 mm²

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

8.6

CUDA

3.0

6.6

Shader Model

5.1

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