AMD Radeon HD 6990M Rebrand vs AMD Radeon HD 6630M Mac Edition

VS

AMD Radeon HD 6990M Rebrand AMD Radeon HD 6630M Mac Edition

We compared two Mobile platform GPUs: 1024MB VRAM Radeon HD 6990M Rebrand 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 6990M Rebrand 's Advantages

Released 6 months late

More VRAM (1024GB vs 256GB)

Larger VRAM bandwidth (70.40GB/s vs 19.20GB/s)

320 additional rendering cores

AMD Radeon HD 6630M Mac Edition 's Advantages

Lower TDP (26W vs 100W)

Score

Benchmark

FP32 (float)

Radeon HD 6990M Rebrand +166%

1.28 TFLOPS

Radeon HD 6630M Mac Edition

0.48 TFLOPS

Radeon HD 6990M Rebrand

VS

Radeon HD 6630M Mac Edition

Graphics Card

Jul 2011

Release Date

Jan 2011

Vancouver

Generation

Vancouver

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1100 MHz

Memory Clock

600 MHz

Memory

1024MB

Memory Size

256MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

64bit

70.40GB/s

Bandwidth

19.20GB/s

Render Config

-

SM Count

-

14

Compute Units

6

800

Shading Units

480

40

TMUs

24

16

ROPs

8

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

-

256 KB

L2 Cache

-

Theoretical Performance

12.80 GPixel/s

Pixel Rate

4.000 GPixel/s

32.00 GTexel/s

Texture Rate

12.00 GTexel/s

-

FP16 (half)

-

1280 GFLOPS

FP32 (float)

480.0 GFLOPS

-

FP64 (double)

-

Graphics Processor

Broadway

GPU Name

Whistler

Broadway XTX

GPU Variant

Whistler LP

TeraScale 2

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

1.04 billion

Transistors

0.716 billion

166 mm²

Die Size

104 mm²

Board Design

100W

TDP

26W

-

Suggested PSU

-

No outputs

Outputs

No outputs

-

Power Connectors

-

Graphics Features

11.2 (11_0)

DirectX

11.2 (11_0)

4.4

OpenGL

4.4

1.2

OpenCL

1.2

N/A

Vulkan

N/A

-

CUDA

-

5.0

Shader Model

5.0

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