AMD Radeon RX 640 Mobile vs AMD Radeon RX 6400

VS

AMD Radeon RX 640 Mobile AMD Radeon RX 6400

We compared a Mobile platform GPU: 2GB VRAM Radeon RX 640 Mobile and a Desktop platform GPU: 4GB VRAM Radeon RX 6400 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 640 Mobile 's Advantages

Lower TDP (50W vs 53W)

AMD Radeon RX 6400 's Advantages

Released 2 years and 8 months late

Boost Clock has increased by 91% (2321MHz vs 1218MHz)

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (128.0GB/s vs 48.00GB/s)

128 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon RX 640 Mobile

1.559 TFLOPS

Radeon RX 6400 +128%

3.565 TFLOPS

Radeon RX 640 Mobile

VS

Radeon RX 6400

Graphics Card

May 2019

Release Date

Jan 2022

Mobility Radeon

Generation

Navi II

Mobile

Type

Desktop

PCIe 3.0 x8

Bus Interface

PCIe 4.0 x4

Clock Speeds

1082 MHz

Base Clock

1923 MHz

1218 MHz

Boost Clock

2321 MHz

1500 MHz

Memory Clock

2000 MHz

Memory

2GB

Memory Size

4GB

GDDR5

Memory Type

GDDR6

64bit

Memory Bus

64bit

48.00GB/s

Bandwidth

128.0GB/s

Render Config

-

SM Count

-

10

Compute Units

12

640

Shading Units

768

40

TMUs

48

16

ROPs

32

-

Tensor Cores

-

RT Cores

12

16 KB (per CU)

L1 Cache

128 KB per Array

512 KB

L2 Cache

1024 KB

Theoretical Performance

19.49 GPixel/s

Pixel Rate

74.27 GPixel/s

48.72 GTexel/s

Texture Rate

111.4 GTexel/s

1.559 TFLOPS

FP16 (half)

7.130 TFLOPS

1.559 TFLOPS

FP32 (float)

3.565 TFLOPS

97.44 GFLOPS

FP64 (double)

222.8 GFLOPS

Graphics Processor

Polaris 23

GPU Name

Navi 24

Polaris 23 XT

GPU Variant

Navi 24 XL (215-135000046)

GCN 4.0

Architecture

RDNA 2.0

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

6 nm

2.2 billion

Transistors

5.4 billion

103 mm²

Die Size

107 mm²

Board Design

50W

TDP

53W

-

Suggested PSU

250 W

No outputs

Outputs

1x HDMI 2.1 1x DisplayPort 1.4a

None

Power Connectors

None

Graphics Features

12 (12_0)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

2.1

OpenCL

2.2

1.2

Vulkan

1.3

-

CUDA

-

6.4

Shader Model

6.6

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