AMD Radeon RX 6800M vs AMD Radeon R9 M390 Mac Edition

VS

AMD Radeon RX 6800M AMD Radeon R9 M390 Mac Edition

We compared two Mobile platform GPUs: 12GB VRAM Radeon RX 6800M and 2GB VRAM Radeon R9 M390 Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6800M 's Advantages

Released 6 years late

Boost Clock2390MHz

More VRAM (12GB vs 2GB)

Larger VRAM bandwidth (384.0GB/s vs 174.7GB/s)

1536 additional rendering cores

AMD Radeon R9 M390 Mac Edition 's Advantages

Lower TDP (80W vs 145W)

Score

Benchmark

FP32 (float)

Radeon RX 6800M +523%

12.24 TFLOPS

Radeon R9 M390 Mac Edition

1.962 TFLOPS

Radeon RX 6800M

VS

Radeon R9 M390 Mac Edition

Graphics Card

May 2021

Release Date

May 2015

Mobility Radeon

Generation

Crystal System

Mobile

Type

Mobile

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

2116 MHz

Base Clock

-

2390 MHz

Boost Clock

-

2000 MHz

Memory Clock

1365 MHz

Memory

12GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

192bit

Memory Bus

256bit

384.0GB/s

Bandwidth

174.7GB/s

Render Config

-

SM Count

-

40

Compute Units

16

2560

Shading Units

1024

160

TMUs

64

ROPs

32

-

Tensor Cores

-

40

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

3 MB

L2 Cache

512 KB

Theoretical Performance

153.0 GPixel/s

Pixel Rate

30.66 GPixel/s

382.4 GTexel/s

Texture Rate

61.31 GTexel/s

24.47 TFLOPS

FP16 (half)

-

12.24 TFLOPS

FP32 (float)

1.962 TFLOPS

764.8 GFLOPS

FP64 (double)

122.6 GFLOPS

Graphics Processor

Navi 22

GPU Name

Pitcairn

Navi 22 XTM

GPU Variant

Pitcairn PRO (215-0828062)

RDNA 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

7 nm

Process Size

28 nm

17.2 billion

Transistors

2.8 billion

335 mm²

Die Size

212 mm²

Board Design

145W

TDP

80W

-

Suggested PSU

-

No outputs

Outputs

No outputs

None

Power Connectors

None

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.1

OpenCL

1.2

1.3

Vulkan

1.2

-

CUDA

-

6.5

Shader Model

5.1

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