AMD Radeon HD 6990M Rebrand vs NVIDIA GeForce GTX 660M Mac Edition

VS

AMD Radeon HD 6990M Rebrand

NVIDIA GeForce GTX 660M Mac Edition

We compared two Mobile platform GPUs: 1024MB VRAM Radeon HD 6990M Rebrand and 512MB VRAM GeForce GTX 660M 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

More VRAM (1024GB vs 512GB)

416 additional rendering cores

NVIDIA GeForce GTX 660M Mac Edition 's Advantages

Released 1 years and 9 months late

Larger VRAM bandwidth (80.00GB/s vs 70.40GB/s)

Lower TDP (50W vs 100W)

Score

Benchmark

FP32 (float)

Radeon HD 6990M Rebrand +75%

1.28 TFLOPS

GeForce GTX 660M Mac Edition

0.73 TFLOPS

Radeon HD 6990M Rebrand

VS

GeForce GTX 660M Mac Edition

Graphics Card

Jul 2011

Release Date

Apr 2013

Vancouver

Generation

GeForce 600M

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

MXM-B (3.0)

Clock Speeds

-

1100 MHz

Memory Clock

1250 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

128bit

70.40GB/s

Bandwidth

80.00GB/s

Render Config

14

Compute Units

-

800

Shading Units

384

40

TMUs

32

16

ROPs

16

-

8 KB (per CU)

L1 Cache

16 KB (per SMX)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

12.80 GPixel/s

Pixel Rate

7.600 GPixel/s

32.00 GTexel/s

Texture Rate

30.40 GTexel/s

-

1280 GFLOPS

FP32 (float)

729.6 GFLOPS

-

FP64 (double)

30.40 GFLOPS

Board Design

100W

TDP

50W

-

No outputs

Outputs

No outputs

-

Power Connectors

None

Graphics Processor

Broadway

GPU Name

GK107

Broadway XTX

GPU Variant

-

TeraScale 2

Architecture

Kepler

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.04 billion

Transistors

1.27 billion

166 mm²

Die Size

118 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (11_0)

4.4

OpenGL

4.6

1.2

OpenCL

3.0

N/A

Vulkan

1.1

-

CUDA

3.0

5.0

Shader Model

5.1

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