GeForce 7900 GTX and GeForce GTX 660 Rev. 2 - video card comparison

GeForce 7900 GTX

GeForce GTX 660 Rev. 2

Architecture

Curie (2003−2013)

Kepler (2012−2018)

GPU code name

G71

GK104

Market segment

Desktop

Release date

March 2006

September 2014

Interface

PCIe 1.0 x16

PCIe 3.0 x16

Supplementary power connectors

1x 6-pin

Boost clock speed

1032 MHz

Core clock speed

650 MHz

980 MHz

Floating-point performance

1,981 gflops

Manufacturing process technology

90 nm

28 nm

Number of transistors

278 million

3,540 million

Pipelines / CUDA cores

960

Power consumption (TDP)

84 Watt

140 Watt

Texture fill rate

15.60

82.56

Memory type

GDDR3

GDDR5

Maximum RAM amount

512 MB

2 GB

Memory bus width

256 Bit

192 Bit

Memory clock speed

1600 MHz

6008 MHz

Memory bandwidth

51.2 GB/s

144.2 GB/s

Display Connectors

2x DVI, 1x S-Video

2x DVI, 1x HDMI, 1x DisplayPort

HDMI

DirectX

9.0c (9_3)

12 (11_0)

CUDA

3.0

OpenCL

N/A

1.2

OpenGL

2.1

4.6

Shader Model

3.0

5.1

Vulkan

N/A

1.1.126