AMD Radeon HD 8870M vs AMD Radeon RX 640 Mobile

VS

AMD Radeon HD 8870M

AMD Radeon RX 640 Mobile

We compared two Mobile platform GPUs: 2GB VRAM Radeon HD 8870M 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 8870M 's Advantages

Larger VRAM bandwidth (72.00GB/s vs 48.00GB/s)

AMD Radeon RX 640 Mobile 's Advantages

Released 6 years and 1 months late

Boost Clock has increased by 57% (1218MHz vs 775MHz)

Score

Benchmark

FP32 (float)

Radeon HD 8870M

0.992 TFLOPS

Radeon RX 640 Mobile +57%

1.559 TFLOPS

Radeon HD 8870M

VS

Radeon RX 640 Mobile

Graphics Card

Apr 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

725 MHz

Base Clock

1082 MHz

775 MHz

Boost Clock

1218 MHz

1125 MHz

Memory Clock

1500 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

64bit

72.00GB/s

Bandwidth

48.00GB/s

Render Config

10

Compute Units

10

-

640

Shading Units

640

40

TMUs

40

16

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

12.40 GPixel/s

Pixel Rate

19.49 GPixel/s

31.00 GTexel/s

Texture Rate

48.72 GTexel/s

-

FP16 (half)

1.559 TFLOPS

992.0 GFLOPS

FP32 (float)

1.559 TFLOPS

62.00 GFLOPS

FP64 (double)

97.44 GFLOPS

Board Design

Unknown

TDP

50W

-

Portable Device Dependent

Outputs

No outputs

-

Power Connectors

None

Graphics Processor

Venus

GPU Name

Polaris 23

Venus XT (216-0846000)

GPU Variant

Polaris 23 XT

GCN 1.0

Architecture

GCN 4.0

TSMC

Foundry

GlobalFoundries

28 nm

Process Size

14 nm

1.5 billion

Transistors

2.2 billion

123 mm²

Die Size

103 mm²

Graphics Features

12 (11_1)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.1 (1.2)

OpenCL

2.1

1.2.170

Vulkan

1.2

-

6.5 (5.1)

Shader Model

6.4

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