AMD Radeon RX 6800M vs AMD Radeon R5 A255

VS

We compared two Mobile platform GPUs: 12GB VRAM Radeon RX 6800M and 1024MB VRAM Radeon R5 A255 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6800M 's Advantages

Released 7 years and 4 months late

Boost Clock has increased by 154% (2390MHz vs 940MHz)

More VRAM (12GB vs 1GB)

Larger VRAM bandwidth (384.0GB/s vs 64.00GB/s)

2176 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon RX 6800M +1597%

12.24 TFLOPS

Radeon R5 A255

0.721 TFLOPS

Radeon RX 6800M

VS

Radeon R5 A255

Graphics Card

May 2021

Release Date

Jan 2014

Mobility Radeon

Generation

All-In-One

Mobile

Type

Mobile

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x8

Clock Speeds

2116 MHz

Base Clock

925 MHz

2390 MHz

Boost Clock

940 MHz

2000 MHz

Memory Clock

1000 MHz

Memory

12GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

192bit

Memory Bus

128bit

384.0GB/s

Bandwidth

64.00GB/s

Render Config

-

SM Count

-

40

Compute Units

6

2560

Shading Units

384

160

TMUs

24

64

ROPs

8

-

Tensor Cores

-

40

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

3 MB

L2 Cache

256 KB

Theoretical Performance

153.0 GPixel/s

Pixel Rate

7.520 GPixel/s

382.4 GTexel/s

Texture Rate

22.56 GTexel/s

24.47 TFLOPS

FP16 (half)

-

12.24 TFLOPS

FP32 (float)

721.9 GFLOPS

764.8 GFLOPS

FP64 (double)

-

Graphics Processor

Navi 22

GPU Name

Topaz

Navi 22 XTM

GPU Variant

Topaz PRO (216-0858030)

RDNA 2.0

Architecture

GCN 3.0

TSMC

Foundry

TSMC

7 nm

Process Size

28 nm

17.2 billion

Transistors

1.55 billion

335 mm²

Die Size

125 mm²

Board Design

145W

TDP

Unknown

-

Suggested PSU

-

No outputs

Outputs

Portable Device Dependent

None

Power Connectors

-

Graphics Features

12 Ultimate (12_2)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.1

OpenCL

2.1

1.3

Vulkan

1.2.170

-

CUDA

-

6.5

Shader Model

6.5

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