AMD Radeon RX 6800 XT vs AMD Radeon RX 455 OEM

VS

AMD Radeon RX 6800 XT AMD Radeon RX 455 OEM

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6800 XT and 2GB VRAM Radeon RX 455 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6800 XT 's Advantages

Released 4 years and 4 months late

Boost Clock2250MHz

More VRAM (16GB vs 2GB)

Larger VRAM bandwidth (512.0GB/s vs 104.0GB/s)

3840 additional rendering cores

AMD Radeon RX 455 OEM 's Advantages

Lower TDP (100W vs 300W)

Score

Benchmark

FP32 (float)

Radeon RX 6800 XT +1185%

20.74 TFLOPS

Radeon RX 455 OEM

1.613 TFLOPS

Radeon RX 6800 XT

VS

Radeon RX 455 OEM

Graphics Card

Oct 2020

Release Date

Jun 2016

Navi II

Generation

Arctic Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1825 MHz

Base Clock

-

2250 MHz

Boost Clock

-

2000 MHz

Memory Clock

1625 MHz

Memory

16GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

128bit

512.0GB/s

Bandwidth

104.0GB/s

Render Config

-

SM Count

-

72

Compute Units

12

4608

Shading Units

768

288

TMUs

48

128

ROPs

16

-

Tensor Cores

-

72

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

4 MB

L2 Cache

256 KB

Theoretical Performance

288.0 GPixel/s

Pixel Rate

16.80 GPixel/s

648.0 GTexel/s

Texture Rate

50.40 GTexel/s

41.47 TFLOPS

FP16 (half)

-

20.74 TFLOPS

FP32 (float)

1.613 TFLOPS

1296 GFLOPS

FP64 (double)

100.8 GFLOPS

Graphics Processor

Navi 21

GPU Name

Tobago

Navi 21 XT (215-121000177)

GPU Variant

Tobago PRO (215-0875010)

RDNA 2.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

7 nm

Process Size

28 nm

26.8 billion

Transistors

2.08 billion

520 mm²

Die Size

160 mm²

Board Design

300W

TDP

100W

700 W

Suggested PSU

300 W

1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C

Outputs

1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

2x 8-pin

Power Connectors

1x 6-pin

Graphics Features

12 Ultimate (12_2)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.1

OpenCL

2.0

1.3

Vulkan

1.2

-

CUDA

-

6.5

Shader Model

6.3

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