NVIDIA GeForce GTX 660 Rev. 2 vs AMD Radeon HD 7970 X2

VS

NVIDIA GeForce GTX 660 Rev. 2

AMD Radeon HD 7970 X2

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Rev. 2 and 3GB VRAM Radeon HD 7970 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 Rev. 2 's Advantages

Released 2 years and 1 months late

Boost Clock1032MHz

Lower TDP (140W vs 500W)

AMD Radeon HD 7970 X2 's Advantages

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (264.0GB/s vs 144.2GB/s)

1088 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GTX 660 Rev. 2

1.981 TFLOPS

Radeon HD 7970 X2 +91%

3.789 TFLOPS

GeForce GTX 660 Rev. 2

VS

Radeon HD 7970 X2

Graphics Card

Sep 2014

Release Date

Aug 2012

GeForce 600

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

980 MHz

Base Clock

-

1032 MHz

Boost Clock

-

1502 MHz

Memory Clock

1375 MHz

Memory

2GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

384bit

144.2GB/s

Bandwidth

264.0GB/s

Render Config

-

Compute Units

32

-

960

Shading Units

2048

80

TMUs

128

24

ROPs

32

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

768 KB

-

Theoretical Performance

20.64 GPixel/s

Pixel Rate

29.60 GPixel/s

82.56 GTexel/s

Texture Rate

118.4 GTexel/s

-

1.981 TFLOPS

FP32 (float)

3.789 TFLOPS

82.56 GFLOPS

FP64 (double)

947.2 GFLOPS

Board Design

140W

TDP

500W

300 W

Suggested PSU

900 W

2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

Outputs

2x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

1x 6-pin

Power Connectors

3x 8-pin

Graphics Processor

GK104

GPU Name

New Zealand

-

Kepler

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

3.54 billion

Transistors

4.313 billion

294 mm²

Die Size

352 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

3.0

OpenCL

1.2

1.1

Vulkan

1.2

3.0

CUDA

-

5.1

Shader Model

5.1

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