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

VS

AMD Radeon HD 7970 GHz Edition NVIDIA GeForce GTX 660 Rev. 2

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

Main Differences

AMD Radeon HD 7970 GHz Edition 's Advantages

Boost Clock has increased by 2% (1050MHz vs 1032MHz)

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (288.0GB/s vs 144.2GB/s)

1088 additional rendering cores

NVIDIA GeForce GTX 660 Rev. 2 's Advantages

Released 2 years and 3 months late

Lower TDP (140W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 7970 GHz Edition +117%

4.301 TFLOPS

GeForce GTX 660 Rev. 2

1.981 TFLOPS

Radeon HD 7970 GHz Edition

VS

GeForce GTX 660 Rev. 2

Graphics Card

Jun 2012

Release Date

Sep 2014

Southern Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1000 MHz

Base Clock

980 MHz

1050 MHz

Boost Clock

1032 MHz

1500 MHz

Memory Clock

1502 MHz

Memory

3GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

192bit

288.0GB/s

Bandwidth

144.2GB/s

Render Config

-

SM Count

-

32

Compute Units

-

2048

Shading Units

960

128

TMUs

80

32

ROPs

24

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

768 KB

L2 Cache

384 KB

Theoretical Performance

33.60 GPixel/s

Pixel Rate

20.64 GPixel/s

134.4 GTexel/s

Texture Rate

82.56 GTexel/s

-

FP16 (half)

-

4.301 TFLOPS

FP32 (float)

1.981 TFLOPS

1075 GFLOPS

FP64 (double)

82.56 GFLOPS

Graphics Processor

Tahiti

GPU Name

GK104

Tahiti XT2 (215-0821065)

GPU Variant

-

GCN 1.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

3.54 billion

352 mm²

Die Size

294 mm²

Board Design

300W

TDP

140W

700 W

Suggested PSU

300 W

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

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin

Graphics Features

12 (11_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

1.2

OpenCL

3.0

1.2

Vulkan

1.1

-

CUDA

3.0

5.1

Shader Model

5.1

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