AMD Radeon HD 6870M vs AMD Radeon RX 640 Mobile

VS

AMD Radeon HD 6870M

AMD Radeon RX 640 Mobile

We compared two Mobile platform GPUs: 1024MB VRAM Radeon HD 6870M 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 6870M 's Advantages

Larger VRAM bandwidth (64.00GB/s vs 48.00GB/s)

160 additional rendering cores

AMD Radeon RX 640 Mobile 's Advantages

Released 8 years and 4 months late

Boost Clock1218MHz

More VRAM (2GB vs 1024GB)

Score

Benchmark

FP32 (float)

Radeon HD 6870M

1.08 TFLOPS

Radeon RX 640 Mobile +44%

1.559 TFLOPS

Radeon HD 6870M

VS

Radeon RX 640 Mobile

Graphics Card

Jan 2011

Release Date

May 2019

Vancouver

Generation

Mobility Radeon

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 3.0 x8

Clock Speeds

-

Base Clock

1082 MHz

-

Boost Clock

1218 MHz

1000 MHz

Memory Clock

1500 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

64bit

64.00GB/s

Bandwidth

48.00GB/s

Render Config

10

Compute Units

10

-

800

Shading Units

640

40

TMUs

40

16

ROPs

16

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

10.80 GPixel/s

Pixel Rate

19.49 GPixel/s

27.00 GTexel/s

Texture Rate

48.72 GTexel/s

-

FP16 (half)

1.559 TFLOPS

1080 GFLOPS

FP32 (float)

1.559 TFLOPS

-

FP64 (double)

97.44 GFLOPS

Board Design

50W

TDP

50W

-

No outputs

Outputs

No outputs

-

Power Connectors

None

Graphics Processor

Granville

GPU Name

Polaris 23

Granville XT (216-0769024)

GPU Variant

Polaris 23 XT

TeraScale 2

Architecture

GCN 4.0

TSMC

Foundry

GlobalFoundries

40 nm

Process Size

14 nm

1.04 billion

Transistors

2.2 billion

166 mm²

Die Size

103 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (12_0)

4.4

OpenGL

4.6

1.2

OpenCL

2.1

N/A

Vulkan

1.2

-

5.0

Shader Model

6.4

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