Home / GPU Comparison / AMD Radeon 840M or AMD Radeon 680M: What's better?

AMD Radeon 840M

vs

AMD Radeon 680M

GPU Comparison Result

Below are the results of a comparison of AMD Radeon 840M and AMD Radeon 680M video cards based on key performance characteristics, as well as power consumption and much more.

Advantages

AMD Radeon 840M

Higher Boost Clock: 2800-2900 MHz (2800-2900 MHz vs 2200MHz)
Newer Launch Date: February 2025 (February 2025 vs January 2022)

AMD Radeon 680M

More Shading Units: 768 (256 vs 768)

Basic

Intel

Label Name

AMD

February 2025

Launch Date

January 2022

Integrated

Platform

Integrated

Krackan Point / Gorgon Point

Former Codename

4 nm

GPU Lithography

AMD Radeon 840M

Model Name

Radeon 680M

Radeon 800M Series

Generation

Rembrandt

Base Clock

2000MHz

2800-2900 MHz

Boost Clock

2200MHz

Integrated

Bus Interface

PCIe 4.0 x8

Transistors

13,100 million

RT Cores

Compute Units

Tensor Cores

Tensor Cores are specialized processing units designed specifically for deep learning, providing higher training and inference performance compared to FP32 training. They enable rapid computations in areas such as computer vision, natural language processing, speech recognition, text-to-speech conversion, and personalized recommendations. The two most notable applications of Tensor Cores are DLSS (Deep Learning Super Sampling) and AI Denoiser for noise reduction.

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.

TSMC

Foundry

TSMC

4 nm

Process Size

6 nm

RDNA 3.5

Architecture

RDNA 2.0

Memory Specifications

Shared system memory

Memory Size

System Shared

System shared

Memory Type

System Shared

Dual-channel system memory, platform dependent

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.

System Shared

System memory dependent

Memory Clock

SystemShared

System memory dependent

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.

System Dependent

Display and Media

Yes

AMD FreeSync

Encode/Decode

AV1 Encode/Decode

Adaptive-Sync, HBR3, UHBR10

DisplayPort Extensions

Encode/Decode

H.264 Hardware Encode/Decode

Encode/Decode

H.265 HEVC Hardware Encode/Decode

No hardware support

H.266 VVC Hardware Encode/Decode

2.3

HDCP Version

2.1

HDMI Version

Intel Quick Sync Video

7680x4320 @ 60Hz

Max Resolution DP

7680x4320 @ 60Hz

Max Resolution HDMI

1080p60 8bpc MPEG2, 1080p60 8bpc VC1, 1080p786 8/10bpc VP9, 2160p196 8/10bpc VP9, 4320p49 8/10bpc VP9, 1080p1200 8bpc H.264, 2160p300 8bpc H.264, 4320p75 8bpc H.264, 1080p786 8/10bpc H.265, 2160p196 8/10bpc H.265, 4320p49 8/10bpc H.265, 1080p960 8/10bpc AV1, 2160p240 8/10bpc AV1, 4320p60 8/10bpc AV1

Max Video Decode Bandwidth

1080p630 8bpc H.264, 1440p373 8bpc H.264, 2160p175 8bpc H.264, 1080p630 8bpc H.265, 1440p373 8bpc H.265, 2160p175 8bpc H.265, 4320p43 8bpc H.265, 1080p864 8/10bpc AV1, 1440p513 8/10bpc AV1, 2160p240 8/10bpc AV1, 4320p60 8/10bpc AV1

Max Video Encode Bandwidth

Number of Displays Supported

HDMI 2.1, DisplayPort 2.1, USB-C DisplayPort Alt Mode; device dependent

Outputs

Portable Device Dependent

Yes

USB Type-C DisplayPort Alternate Mode

Miracast

Wireless Display

Theoretical Performance

22.4-23.2 GPixel/s

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.

70.40 GPixel/s

44.8-46.4 GTexel/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.

105.6 GTexel/s

2.87-2.97 TFLOPS

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.

6.758 TFLOPS

89.6-92.8 GFLOPS

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.

211.2 GFLOPS

1.48 TFLOPS

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.

3.379 TFLOPS

AI Features

Intel Deep Learning Boost on GPU

Up to 50 TOPS

NPU TOPS

Up to 59 TOPS

Processor Overall TOPS

Miscellaneous

Available

AMD SmartAccess Memory

16 total / 16 usable

Native PCIe Lanes

PCIe 4.0

PCI Express Version

256

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

2MB

Shared with processor; platform dependent

TDP

System Dependent

1.4

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

2.1

OpenCL Version

2.0

4.6

OpenGL

4.6

CUDA

12 Ultimate (12_2)

DirectX

12 Ultimate (12_2)

None

Power Connectors

None

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.

6.7

Shader Model

6.7