AMD Radeon R9 M385X vs AMD Radeon RX 6600M

VS

We compared two Mobile platform GPUs: 4GB VRAM Radeon R9 M385X and 8GB VRAM Radeon RX 6600M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6600M 's Advantages

Released 6 years late

Boost Clock has increased by 120% (2416MHz vs 1100MHz)

More VRAM (8GB vs 4GB)

Larger VRAM bandwidth (224.0GB/s vs 76.80GB/s)

896 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R9 M385X

1.971 TFLOPS

Radeon RX 6600M +339%

8.659 TFLOPS

Radeon R9 M385X

VS

Radeon RX 6600M

Graphics Card

May 2015

Release Date

May 2021

Gem System

Generation

Mobility Radeon

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x8

Clock Speeds

1000 MHz

Base Clock

2068 MHz

1100 MHz

Boost Clock

2416 MHz

1200 MHz

Memory Clock

1750 MHz

Memory

4GB

Memory Size

8GB

GDDR5

Memory Type

GDDR6

128bit

Memory Bus

128bit

76.80GB/s

Bandwidth

224.0GB/s

Render Config

-

SM Count

-

14

Compute Units

28

896

Shading Units

1792

56

TMUs

112

16

ROPs

64

-

Tensor Cores

-

RT Cores

28

16 KB (per CU)

L1 Cache

128 KB per Array

256 KB

L2 Cache

2 MB

Theoretical Performance

17.60 GPixel/s

Pixel Rate

154.6 GPixel/s

61.60 GTexel/s

Texture Rate

270.6 GTexel/s

-

FP16 (half)

17.32 TFLOPS

1.971 TFLOPS

FP32 (float)

8.659 TFLOPS

123.2 GFLOPS

FP64 (double)

541.2 GFLOPS

Graphics Processor

Strato

GPU Name

Navi 23

Strato XT

GPU Variant

-

GCN 2.0

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

7 nm

2.08 billion

Transistors

11.06 billion

160 mm²

Die Size

237 mm²

Board Design

Unknown

TDP

100W

-

Suggested PSU

-

Portable Device Dependent

Outputs

No outputs

-

Power Connectors

None

Graphics Features

12 (12_0)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

2.1

OpenCL

2.1

1.2.170

Vulkan

1.3

-

CUDA

-

6.5

Shader Model

6.5

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