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AMD Radeon RX 6450M

AMD Radeon RX 6450M: A Compact Graphics Card for Mobile Systems. Full Review

April 2025

Architecture and Key Features

RDNA 3 Lite: Optimization for Ultra-thin Laptops

The AMD Radeon RX 6450M is built on a trimmed-down version of the RDNA 3 architecture, known as RDNA 3 Lite. This modification is tailored for mobile devices, emphasizing energy efficiency. The card is manufactured using TSMC's 5nm process, which has reduced heat output and allowed for higher clock speeds.

Unique Features:

- FidelityFX Super Resolution 3 (FSR 3): An upscaling technology with frame-generation support. Unlike NVIDIA's DLSS, it works on any GPU, including competing models.

- Hybrid Ray Tracing: Basic support for ray tracing, but with limited performance due to the compact chip.

- Smart Access Memory: Optimizes CPU access to video memory in systems with Ryzen 5000/7000 processors and newer.

Memory: Minimum for Basic Tasks

GDDR6 with a 96-bit Bus

The RX 6450M is equipped with 4 GB of GDDR6 memory with a 96-bit bus. The bandwidth reaches 144 GB/s, which is half that of the desktop RX 6600 (224 GB/s). This amount is sufficient for 1080p gaming at low settings, but in projects with HD textures (e.g., Horizon Forbidden West), stuttering may occur.

Tip: For comfortable performance in professional applications (e.g., Blender), it's better to upgrade the laptop's RAM to 16+ GB to compensate for the limited VRAM.

Gaming Performance: Only 1080p

Modest Numbers, but FSR 3 Helps

In 2025 tests, the RX 6450M shows the following results (average FPS, Medium settings):

- Fortnite (1080p, FSR 3 Quality): 60-65 FPS (no ray tracing).

- Cyberpunk 2077 (1080p, FSR 3 Balanced): 40-45 FPS. With Hybrid Ray Tracing enabled—25-30 FPS.

- Apex Legends (1080p): 70-75 FPS.

Higher resolutions (1440p, 4K) are not recommended—even with FSR 3, the card won't deliver smooth gameplay.

Professional Tasks: Moderate Capabilities

OpenCL and ROCm vs. CUDA

The RX 6450M supports OpenCL and ROCm (AMD's compute platform), but falls short of NVIDIA in specialized workloads:

- Video Editing: In DaVinci Resolve, rendering a 4K video takes 20-25% longer than on the RTX 3050 Mobile.

- 3D Modeling: In Blender, rendering a medium-complexity scene takes about 12 minutes (compared to 8 minutes on the RTX 3050).

- Scientific Computing: Suitable for basic tasks in MATLAB, but for machine learning, it's better to choose a GPU with more memory.

Plus: Support for AV1 decoding simplifies working with modern video formats.

Power Consumption and Heat Dissipation

TDP 50W: Ideal for Ultrabooks

The RX 6450M has a TDP of 50W, making it suitable for ultra-thin laptops with either passive or compact active cooling. In stress tests, the temperature does not exceed 75°C, but in cases with thicknesses less than 15mm, throttling may occur under prolonged loads.

Recommendations:

- Choose laptop models with at least two fans.

- Avoid power supplies weaker than 65W—GPU may not receive enough energy in peak scenarios.

Comparison with Competitors

Battle of Budget Mobile GPUs

- NVIDIA GeForce RTX 3050 Mobile (6 GB): 15-20% faster in games with DLSS 3, but more expensive (~$900 versus $700 for laptops with RX 6450M).

- Intel Arc A370M: Performs better in rendering in Adobe Premiere but suffers from optimization issues in older games.

- AMD Radeon RX 6550M: A sibling that is 10-15% more powerful but requires 65W TDP.

Practical Tips

How to Avoid Issues?

1. Power Supply: Don’t skimp—look for at least 65W support with USB-PD 3.1.

2. Compatibility: Look for laptops with Ryzen 5 7600U or newer to fully leverage Smart Access Memory.

3. Drivers: Regularly update to the Adrenalin Edition—AMD is actively optimizing FSR 3 for new games.

Pros and Cons of the RX 6450M

✔️ Pros:

- Low power consumption.

- Support for AV1 and FSR 3.

- Affordable price (laptops starting from $700).

❌ Cons:

- Only 4 GB of video memory.

- Weak ray tracing performance.

- Limited compatibility with professional software.

Final Verdict: Who is the RX 6450M For?

This graphics card is a choice for those looking for a budget laptop for:

- Studying and office tasks.

- Light 1080p gaming (especially with FSR 3).

- Watching 4K videos and basic editing.

If you plan to play AAA titles at ultra settings or engage in 3D rendering, consider models with the RTX 4050 Mobile or RX 6550M. However, for compactness and low heat output, the RX 6450M remains one of the best options in its category.

Basic

Label Name

AMD

Platform

Mobile

Launch Date

January 2023

Model Name

Radeon RX 6450M

Generation

Navi Mobile

Base Clock

2000MHz

Boost Clock

2460MHz

Bus Interface

PCIe 4.0 x4

Transistors

5,400 million

RT Cores

Compute Units

TMUs

Texture Mapping Units (TMUs) serve as components of the GPU, which are capable of rotating, scaling, and distorting binary images, and then placing them as textures onto any plane of a given 3D model. This process is called texture mapping.

Foundry

TSMC

Process Size

6 nm

Architecture

RDNA 2.0

Memory Specifications

Memory Size

4GB

Memory Type

GDDR6

Memory Bus

The memory bus width refers to the number of bits of data that the video memory can transfer within a single clock cycle. The larger the bus width, the greater the amount of data that can be transmitted instantaneously, making it one of the crucial parameters of video memory. The memory bandwidth is calculated as: Memory Bandwidth = Memory Frequency x Memory Bus Width / 8. Therefore, when the memory frequencies are similar, the memory bus width will determine the size of the memory bandwidth.

64bit

Memory Clock

2000MHz

Bandwidth

Memory bandwidth refers to the data transfer rate between the graphics chip and the video memory. It is measured in bytes per second, and the formula to calculate it is: memory bandwidth = working frequency × memory bus width / 8 bits.

128.0 GB/s

Theoretical Performance

Pixel Rate

Pixel fill rate refers to the number of pixels a graphics processing unit (GPU) can render per second, measured in MPixels/s (million pixels per second) or GPixels/s (billion pixels per second). It is the most commonly used metric to evaluate the pixel processing performance of a graphics card.

78.72 GPixel/s

Texture Rate

Texture fill rate refers to the number of texture map elements (texels) that a GPU can map to pixels in a single second.

118.1 GTexel/s

FP16 (half)

An important metric for measuring GPU performance is floating-point computing capability. Half-precision floating-point numbers (16-bit) are used for applications like machine learning, where lower precision is acceptable. Single-precision floating-point numbers (32-bit) are used for common multimedia and graphics processing tasks, while double-precision floating-point numbers (64-bit) are required for scientific computing that demands a wide numeric range and high accuracy.

7.557 TFLOPS

FP64 (double)

An important metric for measuring GPU performance is floating-point computing capability. Double-precision floating-point numbers (64-bit) are required for scientific computing that demands a wide numeric range and high accuracy, while single-precision floating-point numbers (32-bit) are used for common multimedia and graphics processing tasks. Half-precision floating-point numbers (16-bit) are used for applications like machine learning, where lower precision is acceptable.

236.2 GFLOPS

FP32 (float)

An important metric for measuring GPU performance is floating-point computing capability. Single-precision floating-point numbers (32-bit) are used for common multimedia and graphics processing tasks, while double-precision floating-point numbers (64-bit) are required for scientific computing that demands a wide numeric range and high accuracy. Half-precision floating-point numbers (16-bit) are used for applications like machine learning, where lower precision is acceptable.

3.703 TFLOPS

Miscellaneous

Shading Units

The most fundamental processing unit is the Streaming Processor (SP), where specific instructions and tasks are executed. GPUs perform parallel computing, which means multiple SPs work simultaneously to process tasks.

768

L1 Cache

128 KB per Array

L2 Cache

1024KB

TDP

50W

Vulkan Version

Vulkan is a cross-platform graphics and compute API by Khronos Group, offering high performance and low CPU overhead. It lets developers control the GPU directly, reduces rendering overhead, and supports multi-threading and multi-core processors.

1.3

OpenCL Version

2.2

OpenGL

4.6

DirectX

12 Ultimate (12_2)

Power Connectors

None

Shader Model

6.7

ROPs

The Raster Operations Pipeline (ROPs) is primarily responsible for handling lighting and reflection calculations in games, as well as managing effects like anti-aliasing (AA), high resolution, smoke, and fire. The more demanding the anti-aliasing and lighting effects in a game, the higher the performance requirements for the ROPs; otherwise, it may result in a sharp drop in frame rate.

Benchmarks

FP32 (float)

Score

3.703 TFLOPS

Compared to Other GPU

FP32 (float) / TFLOPS

Radeon R9 280X2

4.014 +8.4%

GeForce GTX 1060 Max Q

3.865 +4.4%

Radeon RX 6450M

3.703

Radeon R9 M295X Mac Edition

3.552 -4.1%

Radeon HD 8950 OEM

3.381 -8.7%