NVIDIA GeForce GTX 660 Rev. 2 vs AMD Radeon HD 7870 GHz Edition

VS

NVIDIA GeForce GTX 660 Rev. 2

AMD Radeon HD 7870 GHz Edition

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Rev. 2 and 2GB VRAM Radeon HD 7870 GHz Edition 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 6 months late

Boost Clock1032MHz

Lower TDP (140W vs 175W)

AMD Radeon HD 7870 GHz Edition 's Advantages

Larger VRAM bandwidth (153.6GB/s vs 144.2GB/s)

320 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GTX 660 Rev. 2

1.981 TFLOPS

Radeon HD 7870 GHz Edition +29%

2.56 TFLOPS

GeForce GTX 660 Rev. 2

VS

Radeon HD 7870 GHz Edition

Graphics Card

Sep 2014

Release Date

Mar 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

1200 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

256bit

144.2GB/s

Bandwidth

153.6GB/s

Render Config

-

Compute Units

20

-

960

Shading Units

1280

80

TMUs

80

24

ROPs

32

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

512 KB

-

Theoretical Performance

20.64 GPixel/s

Pixel Rate

32.00 GPixel/s

82.56 GTexel/s

Texture Rate

80.00 GTexel/s

-

1.981 TFLOPS

FP32 (float)

2.560 TFLOPS

82.56 GFLOPS

FP64 (double)

160.0 GFLOPS

Board Design

140W

TDP

175W

300 W

Suggested PSU

450 W

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

Outputs

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

1x 6-pin

Power Connectors

2x 6-pin

Graphics Processor

GK104

GPU Name

Pitcairn

-

GPU Variant

Pitcairn XT (215-0828047)

Kepler

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

3.54 billion

Transistors

2.8 billion

294 mm²

Die Size

212 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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