NVIDIA GeForce GTX 660 Ti vs AMD Radeon HD 7970

VS

NVIDIA GeForce GTX 660 Ti

AMD Radeon HD 7970

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

Main Differences

NVIDIA GeForce GTX 660 Ti 's Advantages

Released 8 months late

Boost Clock980MHz

Lower TDP (150W vs 250W)

AMD Radeon HD 7970 's Advantages

More VRAM (3GB vs 2GB)

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

704 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GTX 660 Ti

2.634 TFLOPS

Radeon HD 7970 +43%

3.789 TFLOPS

3DMark Time Spy

GeForce GTX 660 Ti

1627

Radeon HD 7970 +40%

2279

GeForce GTX 660 Ti

VS

Radeon HD 7970

Graphics Card

Aug 2012

Release Date

Dec 2011

GeForce 600

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

915 MHz

Base Clock

-

980 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

-

1344

Shading Units

2048

112

TMUs

128

24

ROPs

32

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

768 KB

-

Theoretical Performance

27.44 GPixel/s

Pixel Rate

29.60 GPixel/s

109.8 GTexel/s

Texture Rate

118.4 GTexel/s

-

2.634 TFLOPS

FP32 (float)

3.789 TFLOPS

109.8 GFLOPS

FP64 (double)

947.2 GFLOPS

Board Design

150W

TDP

250W

450 W

Suggested PSU

600 W

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

Outputs

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

2x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

GK104

GPU Name

Tahiti

GK104-300-KD-A2

GPU Variant

Tahiti XT (215-0821060)

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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