AMD Radeon RX 7900M vs AMD Radeon RX 6450M

VS

AMD Radeon RX 7900M

AMD Radeon RX 6450M

We compared two Mobile platform GPUs: 16GB VRAM Radeon RX 7900M and 4GB VRAM Radeon RX 6450M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 7900M 's Advantages

Released 9 months late

More VRAM (16GB vs 4GB)

Larger VRAM bandwidth (576.0GB/s vs 128.0GB/s)

3840 additional rendering cores

AMD Radeon RX 6450M 's Advantages

Boost Clock has increased by 18% (2460MHz vs 2090MHz)

Lower TDP (50W vs 180W)

Score

Benchmark

FP32 (float)

Radeon RX 7900M +919%

38.52 TFLOPS

Radeon RX 6450M

3.779 TFLOPS

Radeon RX 7900M

VS

Radeon RX 6450M

Graphics Card

Oct 2023

Release Date

Jan 2023

Navi Mobile

Generation

Navi Mobile

Mobile

Type

Mobile

PCIe 4.0 x16

Bus Interface

PCIe 4.0 x4

Clock Speeds

1825 MHz

Base Clock

2000 MHz

2090 MHz

Boost Clock

2460 MHz

2250 MHz

Memory Clock

2000 MHz

Memory

16GB

Memory Size

4GB

GDDR6

Memory Type

GDDR6

256bit

Memory Bus

64bit

576.0GB/s

Bandwidth

128.0GB/s

Render Config

72

Compute Units

12

-

4608

Shading Units

768

288

TMUs

48

192

ROPs

32

-

72

RT Cores

12

256 KB per Array

L1 Cache

128 KB per Array

6 MB

L2 Cache

1024 KB

64 MB

L3 Cache

16 MB

Theoretical Performance

401.3 GPixel/s

Pixel Rate

78.72 GPixel/s

601.9 GTexel/s

Texture Rate

118.1 GTexel/s

77.05 TFLOPS

FP16 (half)

7.557 TFLOPS

38.52 TFLOPS

FP32 (float)

3.779 TFLOPS

1204 GFLOPS

FP64 (double)

236.2 GFLOPS

Board Design

180W

TDP

50W

-

Portable Device Dependent

Outputs

Portable Device Dependent

None

Power Connectors

None

Graphics Processor

Navi 31

GPU Name

Navi 24

Navi 31

GPU Variant

Navi 24 XML

RDNA 3.0

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

5 nm

Process Size

6 nm

57.7 billion

Transistors

5.4 billion

529 mm²

Die Size

107 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

2.2

OpenCL

2.2

1.3

Vulkan

1.3

-

6.7

Shader Model

6.7

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