AMD Radeon HD 6490M Mac Edition vs ATI Mobility Radeon HD 4870

VS

AMD Radeon HD 6490M Mac Edition

ATI Mobility Radeon HD 4870

We compared two Mobile platform GPUs: 256MB VRAM Radeon HD 6490M 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

AMD Radeon HD 6490M Mac Edition 's Advantages

Released 2 years and 4 months late

ATI Mobility Radeon HD 4870 's Advantages

More VRAM (512GB vs 256GB)

Larger VRAM bandwidth (56.83GB/s vs 25.41GB/s)

640 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6490M Mac Edition

0.24 TFLOPS

Mobility Radeon HD 4870 +266%

0.88 TFLOPS

Radeon HD 6490M Mac Edition

VS

Mobility Radeon HD 4870

Graphics Card

May 2011

Release Date

Jan 2009

Vancouver

Generation

M9x

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

794 MHz

Memory Clock

888 MHz

Memory

256MB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

64bit

Memory Bus

256bit

25.41GB/s

Bandwidth

56.83GB/s

Render Config

2

Compute Units

10

-

160

Shading Units

800

8

TMUs

40

4

ROPs

16

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

128 KB

L2 Cache

256 KB

-

Theoretical Performance

3.000 GPixel/s

Pixel Rate

8.800 GPixel/s

6.000 GTexel/s

Texture Rate

22.00 GTexel/s

-

240.0 GFLOPS

FP32 (float)

880.0 GFLOPS

-

FP64 (double)

176.0 GFLOPS

Board Design

Unknown

TDP

Unknown

-

Portable Device Dependent

Outputs

Portable Device Dependent

-

Power Connectors

None

Graphics Processor

Seymour

GPU Name

M98

Seymour XTX M2 (216-0809000)

GPU Variant

M98 XT L2 (216-0732023)

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

0.37 billion

Transistors

0.956 billion

67 mm²

Die Size

256 mm²

Graphics Features

11.2 (11_0)

DirectX

10.1 (10_1)

4.4

OpenGL

3.3

1.2

OpenCL

1.1

N/A

Vulkan

N/A

-

5.0

Shader Model

4.1

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