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AMD Radeon RX 7800M

AMD Radeon RX 7800M: A Powerful Mobile GPU for Gamers and Professionals

Overview of Architecture, Performance, and Practical Aspects

Introduction

In March 2025, mobile gamers and professionals received a long-awaited update — the AMD Radeon RX 7800M graphics card. This GPU combines cutting-edge architecture, support for modern technologies, and optimization for laptops. In this article, we will explore whether this model is worth your attention and who will benefit most from it.

1. Architecture and Key Features

RDNA 4: An Evolution of Speed

The RX 7800M is built on the RDNA 4 architecture, which is a logical evolution of RDNA 3. Key improvements include:

- 4nm manufacturing process by TSMC: a 15% increase in energy efficiency compared to the previous generation.

- Accelerated RT cores: ray tracing operates 30% faster than in RDNA 3.

- FidelityFX Super Resolution 3+ algorithm: an upscaling technology that supports AI frame generation. In Quality mode, FPS increases by 50-70% without noticeable loss of detail.

Unique Features

- Hybrid Ray Tracing: A combination of hardware and software ray tracing acceleration for a balance between quality and performance.

- Smart Access Storage: Optimization for PCIe 5.0 SSDs — reducing texture loading times in games by 20%.

- AMD Fluid Motion 2: Smoothing animation in videos and games without increasing the load on the GPU.

2. Memory: Speed and Efficiency

Technical Specifications

- Memory Type: GDDR6X with a speed of 20 Gbps.

- Capacity: 12 GB — sufficient for 4K gaming and working with heavy projects.

- Bus: 192-bit, bandwidth — 480 GB/s.

Impact on Performance

GDDR6X ensures stable performance in high-resolution games. For example, in Cyberpunk 2077: Phantom Liberty at 1440p and ultra settings, the graphics card does not experience memory shortages, while competitors with 8 GB begin to lag.

3. Gaming Performance

Average FPS in Popular Titles (tested on a laptop with Ryzen 7 8800H and 32 GB DDR5):

- 1080p (Ultra):

- Call of Duty: Black Ops 6 — 142 FPS.

- Starfield: Shattered Space — 98 FPS (with FSR 3+ — 136 FPS).

- 1440p (Ultra + RT):

- The Witcher 4 — 67 FPS (Hybrid Ray Tracing enabled).

- Horizon Forbidden West — 82 FPS.

- 4K (High):

- Forza Motorsport 2025 — 58 FPS (FSR 3+ Quality — 78 FPS).

Ray Tracing: Pros and Cons

When RT is enabled, FPS drops by 25-35%, but Hybrid Ray Tracing reduces this figure to 15-20%. In Assassin’s Creed Nexus with RT shadows, the difference between the RX 7800M and RTX 4070 Mobile is minimal — only 5-7 frames.

4. Professional Tasks

Video Editing and 3D Modeling

- DaVinci Resolve: Rendering an 8K project takes 18% less time than with the RTX 4060 Mobile, thanks to optimization for OpenCL.

- Blender: HIP support allows the RX 7800M to render complex scenes. In the BMW27 test, the card shows 420 samples/min compared to 380 for the RTX 4070 Mobile.

Scientific Calculations

- Machine Learning: ROCm 5.5 speeds up model training in TensorFlow by 12% compared to the previous generation.

- Simulations: In ANSYS CFD, the graphics card demonstrates 20% better performance than the Radeon RX 7700M.

5. Power Consumption and Heat Dissipation

TDP and Cooling

- TDP: 150 W — lower than the RTX 4080 Mobile (175 W).

- Recommendations:

- Laptops with a 3-fan cooling system (e.g., ASUS ROG Strix G16).

- Use of cooling pads for prolonged gaming sessions.

Temperature Regulation

Under load, the GPU heats up to 78-82°C, which is 5°C lower than the RX 6800M. Fan noise is 38 dB, comparable to competitors.

6. Comparison with Competitors

Main Competitors:

- NVIDIA RTX 4070 Mobile: Better at ray tracing (by 10-15%), but $200-300 more expensive.

- Intel Arc A770M: $150 cheaper, but lags behind in performance by 25-30%.

- AMD RX 7700M: 18% slower in 4K, but more energy-efficient (TDP 120 W).

Price Range:

The RX 7800M is available in laptops starting at $1600, while models with the RTX 4080 Mobile start at $2000.

7. Practical Tips

Power Supply and Compatibility

- Laptop PSU: At least 280 W for stable operation.

- Platform: Best compatibility with Ryzen 8000HX processors due to SmartShift 4.

Drivers and Software

- Adrenalin 2025 Edition: Simplified interface, automatic overclocking, and temperature monitoring.

- Issues: Early driver versions could conflict with DirectStorage 2.0 — update to 25.3.1 or newer.

8. Pros and Cons

Pros:

- High performance in 1440p and 4K.

- Support for FSR 3+ and Fluid Motion 2.

- Optimization for professional tasks.

Cons:

- Limited selection of laptops with this model (currently available only from ASUS, Lenovo, and MSI).

- No hardware support for AV1 encoding.

9. Final Conclusion: Who is the RX 7800M for?

This graphics card is an ideal choice for:

- Gamers looking to play at 1440p/4K without upgrading their PCs.

- Video editors working with 4K-8K footage.

- Students and engineers who need a balance between mobility and power.

The RX 7800M proves that AMD continues to fight for leadership in the mobile segment, offering future technologies today.

Basic

Label Name

AMD

Platform

Mobile

Launch Date

September 2024

Model Name

Radeon RX 7800M

Generation

Navi Mobile

Base Clock

1825 MHz

Boost Clock

2145 MHz

Bus Interface

PCIe 4.0 x16

Transistors

28.1 billion

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.

240

Foundry

TSMC

Process Size

5 nm

Architecture

RDNA 3.0

Memory Specifications

Memory Size

12GB

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.

192bit

Memory Clock

2250 MHz

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.

432GB/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.

401.3 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.

560.4 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.

71.73 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.

1121 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.

36.587 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.

3840

L1 Cache

256 KB per Array

L2 Cache

6 MB

TDP

180W

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

36.587 TFLOPS

OpenCL

Score

109617

Compared to Other GPU

FP32 (float) / TFLOPS

Radeon PRO W7800

45.676 +24.8%

GeForce RTX 4070 Ti

40.892 +11.8%

Radeon RX 7800M

36.587

Radeon RX 7700

32.589 -10.9%

GeForce RTX 4070

29.733 -18.7%

OpenCL

GeForce RTX 5090 D

385013 +251.2%

A10G

167342 +52.7%

Radeon RX 7800M

109617

Radeon RX 6600 LE

73649 -32.8%

GeForce GTX 1080

54453 -50.3%