AMD Radeon RX 6900 XT vs ATI Radeon HD 5450 PCIe x1

VS

AMD Radeon RX 6900 XT

ATI Radeon HD 5450 PCIe x1

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6900 XT and 512MB VRAM Radeon HD 5450 PCIe x1 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6900 XT 's Advantages

Released 10 years and 8 months late

Boost Clock2250MHz

More VRAM (16GB vs 512GB)

Larger VRAM bandwidth (512.0GB/s vs 8.000GB/s)

5040 additional rendering cores

ATI Radeon HD 5450 PCIe x1 's Advantages

Lower TDP (19W vs 300W)

Score

Benchmark

FP32 (float)

Radeon RX 6900 XT +22053%

23.04 TFLOPS

Radeon HD 5450 PCIe x1

0.104 TFLOPS

Radeon RX 6900 XT

VS

Radeon HD 5450 PCIe x1

Graphics Card

Oct 2020

Release Date

Feb 2010

Navi II

Generation

Evergreen

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 2.0 x1

Clock Speeds

1825 MHz

Base Clock

-

2250 MHz

Boost Clock

-

2000 MHz

Memory Clock

500 MHz

Memory

16GB

Memory Size

512MB

GDDR6

Memory Type

DDR3

256bit

Memory Bus

64bit

512.0GB/s

Bandwidth

8.000GB/s

Render Config

80

Compute Units

2

-

5120

Shading Units

80

320

TMUs

8

128

ROPs

4

-

80

RT Cores

-

128 KB per Array

L1 Cache

8 KB (per CU)

4 MB

L2 Cache

128 KB

128 MB

L3 Cache

-

Theoretical Performance

288.0 GPixel/s

Pixel Rate

2.600 GPixel/s

720.0 GTexel/s

Texture Rate

5.200 GTexel/s

46.08 TFLOPS

FP16 (half)

-

23.04 TFLOPS

FP32 (float)

104.0 GFLOPS

1440 GFLOPS

FP64 (double)

-

Board Design

300W

TDP

19W

700 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

2x 8-pin

Power Connectors

-

Graphics Processor

Navi 21

GPU Name

Cedar

Navi 21 XTX (215-121000167)

GPU Variant

Cedar PRO

RDNA 2.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

7 nm

Process Size

40 nm

26.8 billion

Transistors

0.292 billion

520 mm²

Die Size

59 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.1

OpenCL

1.2

1.3

Vulkan

N/A

-

6.5

Shader Model

5.0

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