AMD Radeon RX 6600 vs NVIDIA GeForce GT 645 OEM

VS

AMD Radeon RX 6600 NVIDIA GeForce GT 645 OEM

We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 and 1024MB VRAM GeForce GT 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6600 's Advantages

Released 9 years and 6 months late

Boost Clock2491MHz

More VRAM (8GB vs 1GB)

Larger VRAM bandwidth (224.0GB/s vs 91.87GB/s)

1504 additional rendering cores

NVIDIA GeForce GT 645 OEM 's Advantages

Lower TDP (102W vs 132W)

Score

Benchmark

FP32 (float)

Radeon RX 6600 +898%

8.928 TFLOPS

GeForce GT 645 OEM

0.894 TFLOPS

Radeon RX 6600

VS

GeForce GT 645 OEM

Graphics Card

Oct 2021

Release Date

Apr 2012

Navi II

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 4.0 x8

Bus Interface

PCIe 2.0 x16

Clock Speeds

1626 MHz

Base Clock

-

2491 MHz

Boost Clock

-

1750 MHz

Memory Clock

957 MHz

Memory

8GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

128bit

Memory Bus

192bit

224.0GB/s

Bandwidth

91.87GB/s

Render Config

-

SM Count

6

28

Compute Units

-

1792

Shading Units

288

112

TMUs

48

64

ROPs

24

-

Tensor Cores

-

28

RT Cores

-

128 KB per Array

L1 Cache

64 KB (per SM)

2 MB

L2 Cache

384 KB

Theoretical Performance

159.4 GPixel/s

Pixel Rate

9.312 GPixel/s

279.0 GTexel/s

Texture Rate

37.25 GTexel/s

17.86 TFLOPS

FP16 (half)

-

8.928 TFLOPS

FP32 (float)

894.0 GFLOPS

558.0 GFLOPS

FP64 (double)

74.50 GFLOPS

Graphics Processor

Navi 23

GPU Name

GF114

Navi 23 XL (215-130000016)

GPU Variant

-

RDNA 2.0

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

7 nm

Process Size

40 nm

11.06 billion

Transistors

1.95 billion

237 mm²

Die Size

332 mm²

Board Design

132W

TDP

102W

300 W

Suggested PSU

300 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

2x DVI 1x mini-HDMI 1.3a

1x 8-pin

Power Connectors

-

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.1

OpenCL

1.1

1.3

Vulkan

N/A

-

CUDA

2.1

6.5

Shader Model

5.1

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