AMD Radeon RX 6900 XTX vs AMD Radeon RX 455 OEM

VS

AMD Radeon RX 6900 XTX

AMD Radeon RX 455 OEM

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6900 XTX 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 6900 XTX 's Advantages

Boost Clock2435MHz

More VRAM (16GB vs 2GB)

Larger VRAM bandwidth (576.0GB/s vs 104.0GB/s)

4352 additional rendering cores

AMD Radeon RX 455 OEM 's Advantages

Lower TDP (100W vs 330W)

Score

Benchmark

FP32 (float)

Radeon RX 6900 XTX +1445%

24.93 TFLOPS

Radeon RX 455 OEM

1.613 TFLOPS

Radeon RX 6900 XTX

VS

Radeon RX 455 OEM

Graphics Card

Unknown

Release Date

Jun 2016

Navi II

Generation

Arctic Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

2075 MHz

Base Clock

-

2435 MHz

Boost Clock

-

2250 MHz

Memory Clock

1625 MHz

Memory

16GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

128bit

576.0GB/s

Bandwidth

104.0GB/s

Render Config

80

Compute Units

12

-

5120

Shading Units

768

320

TMUs

48

128

ROPs

16

-

80

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

4 MB

L2 Cache

256 KB

128 MB

L3 Cache

-

Theoretical Performance

311.7 GPixel/s

Pixel Rate

16.80 GPixel/s

779.2 GTexel/s

Texture Rate

50.40 GTexel/s

49.87 TFLOPS

FP16 (half)

-

24.93 TFLOPS

FP32 (float)

1.613 TFLOPS

1.558 TFLOPS

FP64 (double)

100.8 GFLOPS

Board Design

330W

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 Processor

Navi 21

GPU Name

Tobago

Navi 21 XTXH (215-121000247)

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

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

-

6.5

Shader Model

6.3

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