NVIDIA GeForce GT 645 OEM vs AMD Radeon RX 6400

VS

NVIDIA GeForce GT 645 OEM

AMD Radeon RX 6400

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 645 OEM and 4GB VRAM Radeon RX 6400 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6400 's Advantages

Released 9 years and 9 months late

Boost Clock2321MHz

More VRAM (4GB vs 1024GB)

Larger VRAM bandwidth (128.0GB/s vs 91.87GB/s)

480 additional rendering cores

Lower TDP (53W vs 102W)

Score

Benchmark

FP32 (float)

GeForce GT 645 OEM

0.894 TFLOPS

Radeon RX 6400 +298%

3.565 TFLOPS

GeForce GT 645 OEM

VS

Radeon RX 6400

Graphics Card

Apr 2012

Release Date

Jan 2022

GeForce 600

Generation

Navi II

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 4.0 x4

Clock Speeds

-

Base Clock

1923 MHz

-

Boost Clock

2321 MHz

957 MHz

Memory Clock

2000 MHz

Memory

1024MB

Memory Size

4GB

GDDR5

Memory Type

GDDR6

192bit

Memory Bus

64bit

91.87GB/s

Bandwidth

128.0GB/s

Render Config

-

Compute Units

12

6

SM Count

-

288

Shading Units

768

48

TMUs

48

24

ROPs

32

-

RT Cores

12

64 KB (per SM)

L1 Cache

128 KB per Array

384 KB

L2 Cache

1024 KB

-

L3 Cache

16 MB

Theoretical Performance

9.312 GPixel/s

Pixel Rate

74.27 GPixel/s

37.25 GTexel/s

Texture Rate

111.4 GTexel/s

-

FP16 (half)

7.130 TFLOPS

894.0 GFLOPS

FP32 (float)

3.565 TFLOPS

74.50 GFLOPS

FP64 (double)

222.8 GFLOPS

Board Design

102W

TDP

53W

300 W

Suggested PSU

250 W

2x DVI 1x mini-HDMI 1.3a

Outputs

1x HDMI 2.1 1x DisplayPort 1.4a

-

Power Connectors

None

Graphics Processor

GF114

GPU Name

Navi 24

-

GPU Variant

Navi 24 XL (215-135000046)

Fermi 2.0

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

6 nm

1.95 billion

Transistors

5.4 billion

332 mm²

Die Size

107 mm²

Graphics Features

12 (11_0)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

1.1

OpenCL

2.2

N/A

Vulkan

1.3

2.1

CUDA

-

5.1

Shader Model

6.7

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