AMD Radeon R9 M390X vs AMD Radeon RX 6800S

VS

AMD Radeon R9 M390X

AMD Radeon RX 6800S

We compared two Mobile platform GPUs: 4GB VRAM Radeon R9 M390X and 8GB VRAM Radeon RX 6800S to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 M390X 's Advantages

Lower TDP (75W vs 100W)

AMD Radeon RX 6800S 's Advantages

Released 6 years and 8 months late

Boost Clock2100MHz

More VRAM (8GB vs 4GB)

Larger VRAM bandwidth (256.0GB/s vs 160.0GB/s)

Score

Benchmark

FP32 (float)

Radeon R9 M390X

2.961 TFLOPS

Radeon RX 6800S +190%

8.602 TFLOPS

Radeon R9 M390X

VS

Radeon RX 6800S

Graphics Card

May 2015

Release Date

Jan 2022

Crystal System

Generation

Mobility Radeon

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x8

Clock Speeds

-

Base Clock

1800 MHz

-

Boost Clock

2100 MHz

1250 MHz

Memory Clock

2000 MHz

Memory

4GB

Memory Size

8GB

GDDR5

Memory Type

GDDR6

256bit

Memory Bus

128bit

160.0GB/s

Bandwidth

256.0GB/s

Render Config

32

Compute Units

32

-

2048

Shading Units

2048

128

TMUs

128

32

ROPs

64

-

RT Cores

32

16 KB (per CU)

L1 Cache

128 KB per Array

512 KB

L2 Cache

2 MB

-

L3 Cache

32 MB

Theoretical Performance

23.14 GPixel/s

Pixel Rate

134.4 GPixel/s

92.54 GTexel/s

Texture Rate

268.8 GTexel/s

2.961 TFLOPS

FP16 (half)

17.20 TFLOPS

2.961 TFLOPS

FP32 (float)

8.602 TFLOPS

185.1 GFLOPS

FP64 (double)

537.6 GFLOPS

Board Design

75W

TDP

100W

-

No outputs

Outputs

No outputs

None

Power Connectors

None

Graphics Processor

Amethyst

GPU Name

Navi 23

Amethyst XT

GPU Variant

-

GCN 3.0

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

7 nm

5 billion

Transistors

11.06 billion

366 mm²

Die Size

237 mm²

Graphics Features

12 (12_0)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

2.0

OpenCL

2.1

1.2

Vulkan

1.3

-

6.3

Shader Model

6.5

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