AMD Radeon RX 6600M vs AMD Radeon RX 640 Mobile

VS

AMD Radeon RX 6600M

AMD Radeon RX 640 Mobile

We compared two Mobile platform GPUs: 8GB VRAM Radeon RX 6600M and 2GB VRAM Radeon RX 640 Mobile to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6600M 's Advantages

Released 2 years late

Boost Clock has increased by 98% (2416MHz vs 1218MHz)

More VRAM (8GB vs 2GB)

Larger VRAM bandwidth (224.0GB/s vs 48.00GB/s)

1152 additional rendering cores

AMD Radeon RX 640 Mobile 's Advantages

Lower TDP (50W vs 100W)

Score

Benchmark

FP32 (float)

Radeon RX 6600M +455%

8.659 TFLOPS

Radeon RX 640 Mobile

1.559 TFLOPS

Radeon RX 6600M

VS

Radeon RX 640 Mobile

Graphics Card

May 2021

Release Date

May 2019

Mobility Radeon

Generation

Mobility Radeon

Mobile

Type

Mobile

PCIe 4.0 x8

Bus Interface

PCIe 3.0 x8

Clock Speeds

2068 MHz

Base Clock

1082 MHz

2416 MHz

Boost Clock

1218 MHz

1750 MHz

Memory Clock

1500 MHz

Memory

8GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

128bit

Memory Bus

64bit

224.0GB/s

Bandwidth

48.00GB/s

Render Config

28

Compute Units

10

-

1792

Shading Units

640

112

TMUs

40

64

ROPs

16

-

28

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

2 MB

L2 Cache

512 KB

32 MB

L3 Cache

-

Theoretical Performance

154.6 GPixel/s

Pixel Rate

19.49 GPixel/s

270.6 GTexel/s

Texture Rate

48.72 GTexel/s

17.32 TFLOPS

FP16 (half)

1.559 TFLOPS

8.659 TFLOPS

FP32 (float)

1.559 TFLOPS

541.2 GFLOPS

FP64 (double)

97.44 GFLOPS

Board Design

100W

TDP

50W

-

No outputs

Outputs

No outputs

None

Power Connectors

None

Graphics Processor

Navi 23

GPU Name

Polaris 23

-

GPU Variant

Polaris 23 XT

RDNA 2.0

Architecture

GCN 4.0

TSMC

Foundry

GlobalFoundries

7 nm

Process Size

14 nm

11.06 billion

Transistors

2.2 billion

237 mm²

Die Size

103 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.1

OpenCL

2.1

1.3

Vulkan

1.2

-

6.5

Shader Model

6.4

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