ATI Mobility Radeon HD 3870 vs AMD Radeon HD 6490M Mac Edition

VS

ATI Mobility Radeon HD 3870 AMD Radeon HD 6490M Mac Edition

We compared two Mobile platform GPUs: 512MB VRAM Mobility Radeon HD 3870 and 256MB VRAM Radeon HD 6490M Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Mobility Radeon HD 3870 's Advantages

More VRAM (512GB vs 256GB)

Larger VRAM bandwidth (54.40GB/s vs 25.41GB/s)

160 additional rendering cores

AMD Radeon HD 6490M Mac Edition 's Advantages

Released 2 years and 11 months late

Score

Benchmark

FP32 (float)

Mobility Radeon HD 3870 +75%

0.422 TFLOPS

Radeon HD 6490M Mac Edition

0.24 TFLOPS

Mobility Radeon HD 3870

VS

Radeon HD 6490M Mac Edition

Graphics Card

Jun 2008

Release Date

May 2011

M8x

Generation

Vancouver

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

850 MHz

Memory Clock

794 MHz

Memory

512MB

Memory Size

256MB

GDDR3

Memory Type

GDDR5

256bit

Memory Bus

64bit

54.40GB/s

Bandwidth

25.41GB/s

Render Config

-

SM Count

-

4

Compute Units

2

320

Shading Units

160

16

TMUs

8

16

ROPs

4

-

Tensor Cores

-

RT Cores

-

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

128 KB

Theoretical Performance

10.56 GPixel/s

Pixel Rate

3.000 GPixel/s

10.56 GTexel/s

Texture Rate

6.000 GTexel/s

-

FP16 (half)

-

422.4 GFLOPS

FP32 (float)

240.0 GFLOPS

84.48 GFLOPS

FP64 (double)

-

Graphics Processor

M88

GPU Name

Seymour

-

GPU Variant

Seymour XTX M2 (216-0809000)

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.666 billion

Transistors

0.37 billion

192 mm²

Die Size

67 mm²

Board Design

55W

TDP

Unknown

-

Suggested PSU

-

No outputs

Outputs

Portable Device Dependent

-

Power Connectors

-

Graphics Features

10.1 (10_1)

DirectX

11.2 (11_0)

3.3

OpenGL

4.4

N/A

OpenCL

1.2

N/A

Vulkan

N/A

-

CUDA

-

4.1

Shader Model

5.0

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