AMD Radeon HD 8870M vs ATI Mobility Radeon HD 4670 Mac Edition

VS

AMD Radeon HD 8870M

ATI Mobility Radeon HD 4670 Mac Edition

We compared two Mobile platform GPUs: 2GB VRAM Radeon HD 8870M and 256MB VRAM Mobility Radeon HD 4670 Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8870M 's Advantages

Released 3 years and 7 months late

Boost Clock775MHz

More VRAM (2GB vs 256GB)

Larger VRAM bandwidth (72.00GB/s vs 25.28GB/s)

320 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 8870M +128%

0.992 TFLOPS

Mobility Radeon HD 4670 Mac Edition

0.435 TFLOPS

Radeon HD 8870M

VS

Mobility Radeon HD 4670 Mac Edition

Graphics Card

Apr 2013

Release Date

Sep 2009

Solar System

Generation

M9x

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

MXM-A (3.0)

Clock Speeds

725 MHz

Base Clock

-

775 MHz

Boost Clock

-

1125 MHz

Memory Clock

790 MHz

Memory

2GB

Memory Size

256MB

GDDR5

Memory Type

GDDR3

128bit

Memory Bus

128bit

72.00GB/s

Bandwidth

25.28GB/s

Render Config

10

Compute Units

4

-

640

Shading Units

320

40

TMUs

32

16

ROPs

8

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

128 KB

-

Theoretical Performance

12.40 GPixel/s

Pixel Rate

5.440 GPixel/s

31.00 GTexel/s

Texture Rate

21.76 GTexel/s

-

992.0 GFLOPS

FP32 (float)

435.2 GFLOPS

62.00 GFLOPS

FP64 (double)

-

Board Design

Unknown

TDP

35W

-

Portable Device Dependent

Outputs

No outputs

-

Graphics Processor

Venus

GPU Name

M96

Venus XT (216-0846000)

GPU Variant

M96 XT (216-0729051)

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

1.5 billion

Transistors

0.514 billion

123 mm²

Die Size

146 mm²

Graphics Features

12 (11_1)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

2.1 (1.2)

OpenCL

1.1

1.2.170

Vulkan

N/A

-

6.5 (5.1)

Shader Model

4.1

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