NVIDIA GeForce GT 645 OEM vs NVIDIA RTX A4000H

VS

NVIDIA GeForce GT 645 OEM

NVIDIA RTX A4000H

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 645 OEM and 16GB VRAM RTX A4000H to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 645 OEM 's Advantages

Lower TDP (102W vs 140W)

NVIDIA RTX A4000H 's Advantages

Released 9 years late

Boost Clock1560MHz

More VRAM (16GB vs 1024GB)

Larger VRAM bandwidth (448.0GB/s vs 91.87GB/s)

5856 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 645 OEM

0.894 TFLOPS

RTX A4000H +2044%

19.17 TFLOPS

GeForce GT 645 OEM

VS

RTX A4000H

Graphics Card

Apr 2012

Release Date

Apr 2021

GeForce 600

Generation

Quadro Ampere

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

735 MHz

-

Boost Clock

1560 MHz

957 MHz

Memory Clock

1750 MHz

Memory

1024MB

Memory Size

16GB

GDDR5

Memory Type

GDDR6

192bit

Memory Bus

256bit

91.87GB/s

Bandwidth

448.0GB/s

Render Config

-

6

SM Count

48

288

Shading Units

6144

48

TMUs

192

24

ROPs

96

-

Tensor Cores

192

-

RT Cores

48

64 KB (per SM)

L1 Cache

128 KB (per SM)

384 KB

L2 Cache

4 MB

-

Theoretical Performance

9.312 GPixel/s

Pixel Rate

149.8 GPixel/s

37.25 GTexel/s

Texture Rate

299.5 GTexel/s

-

FP16 (half)

19.17 TFLOPS

894.0 GFLOPS

FP32 (float)

19.17 TFLOPS

74.50 GFLOPS

FP64 (double)

299.5 GFLOPS

Board Design

102W

TDP

140W

300 W

Suggested PSU

300 W

2x DVI 1x mini-HDMI 1.3a

Outputs

4x DisplayPort 1.4a

-

Power Connectors

1x 6-pin

Graphics Processor

GF114

GPU Name

GA104

-

GPU Variant

GA104-???-A1

Fermi 2.0

Architecture

Ampere

TSMC

Foundry

Samsung

40 nm

Process Size

8 nm

1.95 billion

Transistors

17.4 billion

332 mm²

Die Size

392 mm²

Graphics Features

12 (11_0)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

1.1

OpenCL

3.0

N/A

Vulkan

1.3

2.1

CUDA

8.6

5.1

Shader Model

6.7

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