GeForce GTX 660 OEM and Radeon HD 6950 - video card comparison

GeForce GTX 660 OEM

Radeon HD 6950

Architecture

Kepler (2012−2018)

TeraScale 3 (2010−2013)

GPU code name

GK104

Cayman

Market segment

Desktop

Desktop

Release date

August 2012

December 2010

Bus support

-

PCIe 2.0 x16

Interface

PCIe 3.0 x16

PCIe 2.0 x16

Supplementary power connectors

1x 6-pin

2x 6-pin

Boost clock speed

888 MHz

800 MHz

Core clock speed

823 MHz

-

Floating-point performance

2,046 gflops

2,252.8 gflops

Manufacturing process technology

28 nm

40 nm

Number of transistors

3,540 million

2,640 million

Pipelines / CUDA cores

1152

1408

Power consumption (TDP)

130 Watt

500 Watt

Texture fill rate

85.25

70.40

Memory type

GDDR5

GDDR5

Maximum RAM amount

2 GB

2 GB

Memory bus width

256 Bit

256 Bit

Memory clock speed

5600 MHz

1250 MHz

Memory bandwidth

179.2 GB/s

-

Display Connectors

2x DVI, 1x HDMI, 1x DisplayPort

2x DVI, 1x HDMI, 2x mini-DisplayPort

Eyefinity

-

1

HDMI

+

+

DisplayPort support

-

-

DirectX

12 (11_0)

DirectX® 11

CUDA

3.0

-

Mantle

-

-

OpenCL

1.2

1.2

OpenGL

4.6

4.4

Shader Model

5.1

5.0

Vulkan

1.1.126

-

AppAcceleration

-

-

CrossFire

-

1

Enduro

-

-

HD3D

-

-

PowerTune

-

-

TrueAudio

-

-

ZeroCore

-

-