AMD Radeon HD 8870M vs AMD Radeon HD 6630M Mac Edition

VS

AMD Radeon HD 8870M

AMD Radeon HD 6630M Mac Edition

We compared two Mobile platform GPUs: 2GB VRAM Radeon HD 8870M and 256MB VRAM Radeon HD 6630M 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 2 years and 3 months late

Boost Clock775MHz

More VRAM (2GB vs 256GB)

Larger VRAM bandwidth (72.00GB/s vs 19.20GB/s)

160 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 8870M +106%

0.992 TFLOPS

Radeon HD 6630M Mac Edition

0.48 TFLOPS

Radeon HD 8870M

VS

Radeon HD 6630M Mac Edition

Graphics Card

Apr 2013

Release Date

Jan 2011

Solar System

Generation

Vancouver

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

725 MHz

Base Clock

-

775 MHz

Boost Clock

-

1125 MHz

Memory Clock

600 MHz

Memory

2GB

Memory Size

256MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

64bit

72.00GB/s

Bandwidth

19.20GB/s

Render Config

10

Compute Units

6

-

640

Shading Units

480

40

TMUs

24

16

ROPs

8

-

16 KB (per CU)

L1 Cache

-

256 KB

L2 Cache

-

Theoretical Performance

12.40 GPixel/s

Pixel Rate

4.000 GPixel/s

31.00 GTexel/s

Texture Rate

12.00 GTexel/s

-

992.0 GFLOPS

FP32 (float)

480.0 GFLOPS

62.00 GFLOPS

FP64 (double)

-

Board Design

Unknown

TDP

26W

-

Portable Device Dependent

Outputs

No outputs

-

Graphics Processor

Venus

GPU Name

Whistler

Venus XT (216-0846000)

GPU Variant

Whistler LP

GCN 1.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.5 billion

Transistors

0.716 billion

123 mm²

Die Size

104 mm²

Graphics Features

12 (11_1)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.1 (1.2)

OpenCL

1.2

1.2.170

Vulkan

N/A

-

6.5 (5.1)

Shader Model

5.0

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