AMD Radeon RX 7900M vs AMD Radeon RX 640 Mobile

VS

AMD Radeon RX 7900M AMD Radeon RX 640 Mobile

We compared two Mobile platform GPUs: 16GB VRAM Radeon RX 7900M and 2GB VRAM Radeon RX 640 Mobile to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 7900M 's Advantages

Released 4 years and 5 months late

Boost Clock has increased by 72% (2090MHz vs 1218MHz)

More VRAM (16GB vs 2GB)

Larger VRAM bandwidth (576.0GB/s vs 48.00GB/s)

3968 additional rendering cores

AMD Radeon RX 640 Mobile 's Advantages

Lower TDP (50W vs 180W)

Score

Benchmark

FP32 (float)

Radeon RX 7900M +2370%

38.52 TFLOPS

Radeon RX 640 Mobile

1.559 TFLOPS

Radeon RX 7900M

VS

Radeon RX 640 Mobile

Graphics Card

Oct 2023

Release Date

May 2019

Navi Mobile

Generation

Mobility Radeon

Mobile

Type

Mobile

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x8

Clock Speeds

1825 MHz

Base Clock

1082 MHz

2090 MHz

Boost Clock

1218 MHz

2250 MHz

Memory Clock

1500 MHz

Memory

16GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

64bit

576.0GB/s

Bandwidth

48.00GB/s

Render Config

-

SM Count

-

72

Compute Units

10

4608

Shading Units

640

288

TMUs

40

192

ROPs

16

-

Tensor Cores

-

72

RT Cores

-

256 KB per Array

L1 Cache

16 KB (per CU)

6 MB

L2 Cache

512 KB

Theoretical Performance

401.3 GPixel/s

Pixel Rate

19.49 GPixel/s

601.9 GTexel/s

Texture Rate

48.72 GTexel/s

77.05 TFLOPS

FP16 (half)

1.559 TFLOPS

38.52 TFLOPS

FP32 (float)

1.559 TFLOPS

1204 GFLOPS

FP64 (double)

97.44 GFLOPS

Graphics Processor

Navi 31

GPU Name

Polaris 23

Navi 31

GPU Variant

Polaris 23 XT

RDNA 3.0

Architecture

GCN 4.0

TSMC

Foundry

GlobalFoundries

5 nm

Process Size

14 nm

57.7 billion

Transistors

2.2 billion

529 mm²

Die Size

103 mm²

Board Design

180W

TDP

50W

-

Suggested PSU

-

Portable Device Dependent

Outputs

No outputs

None

Power Connectors

None

Graphics Features

12 Ultimate (12_2)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.2

OpenCL

2.1

1.3

Vulkan

1.2

-

CUDA

-

6.7

Shader Model

6.4

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