AMD Radeon RX 640 Mobile vs AMD Radeon RX 6850M XT

VS

AMD Radeon RX 640 Mobile

AMD Radeon RX 6850M XT

We compared two Mobile platform GPUs: 2GB VRAM Radeon RX 640 Mobile and 12GB VRAM Radeon RX 6850M XT 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 165W)

AMD Radeon RX 6850M XT 's Advantages

Released 2 years and 8 months late

Boost Clock has increased by 112% (2581MHz vs 1218MHz)

More VRAM (12GB vs 2GB)

Larger VRAM bandwidth (384.0GB/s vs 48.00GB/s)

1920 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon RX 640 Mobile

1.559 TFLOPS

Radeon RX 6850M XT +747%

13.21 TFLOPS

Radeon RX 640 Mobile

VS

Radeon RX 6850M XT

Graphics Card

May 2019

Release Date

Jan 2022

Mobility Radeon

Generation

Mobility Radeon

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 4.0 x16

Clock Speeds

1082 MHz

Base Clock

2321 MHz

1218 MHz

Boost Clock

2581 MHz

1500 MHz

Memory Clock

2000 MHz

Memory

2GB

Memory Size

12GB

GDDR5

Memory Type

GDDR6

64bit

Memory Bus

192bit

48.00GB/s

Bandwidth

384.0GB/s

Render Config

10

Compute Units

40

-

640

Shading Units

2560

40

TMUs

160

16

ROPs

64

-

RT Cores

40

16 KB (per CU)

L1 Cache

128 KB per Array

512 KB

L2 Cache

3 MB

-

L3 Cache

96 MB

Theoretical Performance

19.49 GPixel/s

Pixel Rate

165.2 GPixel/s

48.72 GTexel/s

Texture Rate

413.0 GTexel/s

1.559 TFLOPS

FP16 (half)

26.43 TFLOPS

1.559 TFLOPS

FP32 (float)

13.21 TFLOPS

97.44 GFLOPS

FP64 (double)

825.9 GFLOPS

Board Design

50W

TDP

165W

-

No outputs

Outputs

No outputs

None

Power Connectors

None

Graphics Processor

Polaris 23

GPU Name

Navi 22

Polaris 23 XT

GPU Variant

Navi 22 XTM

GCN 4.0

Architecture

RDNA 2.0

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

7 nm

2.2 billion

Transistors

17.2 billion

103 mm²

Die Size

335 mm²

Graphics Features

12 (12_0)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

2.1

OpenCL

2.1

1.2

Vulkan

1.3

-

6.4

Shader Model

6.5

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