AMD Radeon HD 6990M vs NVIDIA GeForce GTX 660M

VS

AMD Radeon HD 6990M NVIDIA GeForce GTX 660M

We compared two Mobile platform GPUs: 2GB VRAM Radeon HD 6990M and 1024MB VRAM GeForce GTX 660M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6990M 's Advantages

More VRAM (2GB vs 1GB)

Larger VRAM bandwidth (115.2GB/s vs 64.00GB/s)

736 additional rendering cores

NVIDIA GeForce GTX 660M 's Advantages

Released 8 months late

Boost Clock950MHz

Lower TDP (50W vs 100W)

Score

Benchmark

FP32 (float)

Radeon HD 6990M +119%

1.602 TFLOPS

GeForce GTX 660M

0.73 TFLOPS

Radeon HD 6990M

VS

GeForce GTX 660M

Graphics Card

Jul 2011

Release Date

Mar 2012

Vancouver

Generation

GeForce 600M

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

MXM-B (3.0)

Clock Speeds

-

Base Clock

835 MHz

-

Boost Clock

950 MHz

900 MHz

Memory Clock

1000 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

115.2GB/s

Bandwidth

64.00GB/s

Render Config

-

SM Count

-

14

Compute Units

-

1120

Shading Units

384

56

TMUs

32

ROPs

16

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

16 KB (per SMX)

512 KB

L2 Cache

256 KB

Theoretical Performance

22.88 GPixel/s

Pixel Rate

7.600 GPixel/s

40.04 GTexel/s

Texture Rate

30.40 GTexel/s

-

FP16 (half)

-

1.602 TFLOPS

FP32 (float)

729.6 GFLOPS

-

FP64 (double)

30.40 GFLOPS

Graphics Processor

Blackcomb

GPU Name

GK107

Blackcomb XTX (216-0811030)

GPU Variant

N13E-GE-A2

TeraScale 2

Architecture

Kepler

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.7 billion

Transistors

1.27 billion

212 mm²

Die Size

118 mm²

Board Design

100W

TDP

50W

-

Suggested PSU

-

No outputs

Outputs

No outputs

None

Power Connectors

-

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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