AMD Radeon HD 8970M vs AMD Radeon RX 640 Mobile

VS

AMD Radeon HD 8970M

AMD Radeon RX 640 Mobile

We compared two Mobile platform GPUs: 4GB VRAM Radeon HD 8970M 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 HD 8970M 's Advantages

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (153.6GB/s vs 48.00GB/s)

640 additional rendering cores

AMD Radeon RX 640 Mobile 's Advantages

Released 6 years late

Boost Clock has increased by 35% (1218MHz vs 900MHz)

Lower TDP (50W vs 100W)

Score

Benchmark

FP32 (float)

Radeon HD 8970M +47%

2.304 TFLOPS

Radeon RX 640 Mobile

1.559 TFLOPS

Radeon HD 8970M

VS

Radeon RX 640 Mobile

Graphics Card

May 2013

Release Date

May 2019

Solar System

Generation

Mobility Radeon

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x8

Clock Speeds

850 MHz

Base Clock

1082 MHz

900 MHz

Boost Clock

1218 MHz

1200 MHz

Memory Clock

1500 MHz

Memory

4GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

64bit

153.6GB/s

Bandwidth

48.00GB/s

Render Config

20

Compute Units

10

-

1280

Shading Units

640

80

TMUs

40

32

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

512 KB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

19.49 GPixel/s

72.00 GTexel/s

Texture Rate

48.72 GTexel/s

-

FP16 (half)

1.559 TFLOPS

2.304 TFLOPS

FP32 (float)

1.559 TFLOPS

144.0 GFLOPS

FP64 (double)

97.44 GFLOPS

Board Design

100W

TDP

50W

-

No outputs

Outputs

No outputs

-

Power Connectors

None

Graphics Processor

Neptune

GPU Name

Polaris 23

Neptune XT (216-0847000)

GPU Variant

Polaris 23 XT

GCN 1.0

Architecture

GCN 4.0

TSMC

Foundry

GlobalFoundries

28 nm

Process Size

14 nm

2.8 billion

Transistors

2.2 billion

212 mm²

Die Size

103 mm²

Graphics Features

12 (11_1)

DirectX

12 (12_0)

4.6

OpenGL

4.6

1.2

OpenCL

2.1

1.2

Vulkan

1.2

-

5.1

Shader Model

6.4

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