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

VS

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

We compared two Mobile platform GPUs: 512MB VRAM GeForce GTX 660M Mac Edition and 2GB VRAM Radeon HD 6990M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660M Mac Edition 's Advantages

Released 1 years and 9 months late

Lower TDP (50W vs 100W)

AMD Radeon HD 6990M 's Advantages

Larger VRAM bandwidth (115.2GB/s vs 80.00GB/s)

736 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GTX 660M Mac Edition

0.73 TFLOPS

Radeon HD 6990M +119%

1.602 TFLOPS

GeForce GTX 660M Mac Edition

VS

Radeon HD 6990M

Graphics Card

Apr 2013

Release Date

Jul 2011

GeForce 600M

Generation

Vancouver

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

MXM-B (3.0)

Clock Speeds

-

Base Clock

-

Boost Clock

-

1250 MHz

Memory Clock

900 MHz

Memory

512MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

256bit

80.00GB/s

Bandwidth

115.2GB/s

Render Config

-

SM Count

-

Compute Units

14

384

Shading Units

1120

32

TMUs

56

16

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

512 KB

Theoretical Performance

7.600 GPixel/s

Pixel Rate

22.88 GPixel/s

30.40 GTexel/s

Texture Rate

40.04 GTexel/s

-

FP16 (half)

-

729.6 GFLOPS

FP32 (float)

1.602 TFLOPS

30.40 GFLOPS

FP64 (double)

-

Graphics Processor

GK107

GPU Name

Blackcomb

-

GPU Variant

Blackcomb XTX (216-0811030)

Kepler

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.27 billion

Transistors

1.7 billion

118 mm²

Die Size

212 mm²

Board Design

50W

TDP

100W

-

Suggested PSU

-

No outputs

Outputs

No outputs

None

Power Connectors

None

Graphics Features

12 (11_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

3.0

OpenCL

1.2

1.1

Vulkan

N/A

3.0

CUDA

-

5.1

Shader Model

5.0

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