AMD Radeon RX 6600 vs NVIDIA GeForce GTX 645 OEM

VS

AMD Radeon RX 6600

NVIDIA GeForce GTX 645 OEM

We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 and 1024MB VRAM GeForce GTX 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 8 years and 6 months late

Boost Clock2491MHz

More VRAM (8GB vs 1024GB)

Larger VRAM bandwidth (224.0GB/s vs 64.00GB/s)

1216 additional rendering cores

NVIDIA GeForce GTX 645 OEM 's Advantages

Lower TDP (65W vs 132W)

Score

Benchmark

FP32 (float)

Radeon RX 6600 +840%

8.928 TFLOPS

GeForce GTX 645 OEM

0.949 TFLOPS

Radeon RX 6600

VS

GeForce GTX 645 OEM

Graphics Card

Oct 2021

Release Date

Apr 2013

Navi II

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 4.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

1626 MHz

Base Clock

-

2491 MHz

Boost Clock

-

1750 MHz

Memory Clock

1000 MHz

Memory

8GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

128bit

Memory Bus

128bit

224.0GB/s

Bandwidth

64.00GB/s

Render Config

28

Compute Units

-

1792

Shading Units

576

112

TMUs

48

64

ROPs

16

-

28

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per SMX)

2 MB

L2 Cache

256 KB

32 MB

L3 Cache

-

Theoretical Performance

159.4 GPixel/s

Pixel Rate

9.888 GPixel/s

279.0 GTexel/s

Texture Rate

39.55 GTexel/s

17.86 TFLOPS

FP16 (half)

-

8.928 TFLOPS

FP32 (float)

949.2 GFLOPS

558.0 GFLOPS

FP64 (double)

39.55 GFLOPS

Board Design

132W

TDP

65W

300 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 8-pin

Power Connectors

None

Graphics Processor

Navi 23

GPU Name

GK106

Navi 23 XL (215-130000016)

GPU Variant

GK106-200-A1

RDNA 2.0

Architecture

Kepler

TSMC

Foundry

TSMC

7 nm

Process Size

28 nm

11.06 billion

Transistors

2.54 billion

237 mm²

Die Size

221 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.1

OpenCL

3.0

1.3

Vulkan

1.1

-

CUDA

3.0

6.5

Shader Model

5.1

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