ATI Mobility Radeon HD 4670 Mac Edition vs ATI Mobility Radeon HD 4870

VS

ATI Mobility Radeon HD 4670 Mac Edition

ATI Mobility Radeon HD 4870

We compared two Mobile platform GPUs: 256MB VRAM Mobility Radeon HD 4670 Mac Edition and 512MB VRAM Mobility Radeon HD 4870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Mobility Radeon HD 4670 Mac Edition 's Advantages

Released 8 months late

ATI Mobility Radeon HD 4870 's Advantages

More VRAM (512GB vs 256GB)

Larger VRAM bandwidth (56.83GB/s vs 25.28GB/s)

480 additional rendering cores

Score

Benchmark

FP32 (float)

Mobility Radeon HD 4670 Mac Edition

0.435 TFLOPS

Mobility Radeon HD 4870 +102%

0.88 TFLOPS

Mobility Radeon HD 4670 Mac Edition

VS

Mobility Radeon HD 4870

Graphics Card

Sep 2009

Release Date

Jan 2009

M9x

Generation

M9x

Mobile

Type

Mobile

MXM-A (3.0)

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

790 MHz

Memory Clock

888 MHz

Memory

256MB

Memory Size

512MB

GDDR3

Memory Type

GDDR3

128bit

Memory Bus

256bit

25.28GB/s

Bandwidth

56.83GB/s

Render Config

4

Compute Units

10

-

320

Shading Units

800

32

TMUs

40

8

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

128 KB

L2 Cache

256 KB

-

Theoretical Performance

5.440 GPixel/s

Pixel Rate

8.800 GPixel/s

21.76 GTexel/s

Texture Rate

22.00 GTexel/s

-

435.2 GFLOPS

FP32 (float)

880.0 GFLOPS

-

FP64 (double)

176.0 GFLOPS

Board Design

35W

TDP

Unknown

-

No outputs

Outputs

Portable Device Dependent

-

Power Connectors

None

Graphics Processor

M96

GPU Name

M98

M96 XT (216-0729051)

GPU Variant

M98 XT L2 (216-0732023)

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

55 nm

Process Size

55 nm

0.514 billion

Transistors

0.956 billion

146 mm²

Die Size

256 mm²

Graphics Features

10.1 (10_1)

DirectX

10.1 (10_1)

3.3

OpenGL

3.3

1.1

OpenCL

1.1

N/A

Vulkan

N/A

-

4.1

Shader Model

4.1

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