NVIDIA GeForce GTX 660 Rev. 2 vs NVIDIA GeForce GTX 680 Mac Edition

VS

NVIDIA GeForce GTX 660 Rev. 2

NVIDIA GeForce GTX 680 Mac Edition

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Rev. 2 and 2GB VRAM GeForce GTX 680 Mac 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 1 years and 5 months late

Lower TDP (140W vs 195W)

NVIDIA GeForce GTX 680 Mac Edition 's Advantages

Boost Clock has increased by 3% (1058MHz vs 1032MHz)

Larger VRAM bandwidth (192.3GB/s vs 144.2GB/s)

576 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GTX 660 Rev. 2

1.981 TFLOPS

GeForce GTX 680 Mac Edition +64%

3.25 TFLOPS

GeForce GTX 660 Rev. 2

VS

GeForce GTX 680 Mac Edition

Graphics Card

Sep 2014

Release Date

Apr 2013

GeForce 600

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

980 MHz

Base Clock

1006 MHz

1032 MHz

Boost Clock

1058 MHz

1502 MHz

Memory Clock

1502 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

256bit

144.2GB/s

Bandwidth

192.3GB/s

Render Config

-

960

Shading Units

1536

80

TMUs

128

24

ROPs

32

-

16 KB (per SMX)

L1 Cache

16 KB (per SMX)

384 KB

L2 Cache

512 KB

-

Theoretical Performance

20.64 GPixel/s

Pixel Rate

33.86 GPixel/s

82.56 GTexel/s

Texture Rate

135.4 GTexel/s

-

1.981 TFLOPS

FP32 (float)

3.250 TFLOPS

82.56 GFLOPS

FP64 (double)

135.4 GFLOPS

Board Design

140W

TDP

195W

300 W

Suggested PSU

450 W

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

Outputs

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

1x 6-pin

Power Connectors

2x 6-pin

Graphics Processor

GK104

GPU Name

GK104

-

GPU Variant

GK104-400-A2

Kepler

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

3.54 billion

Transistors

3.54 billion

294 mm²

Die Size

294 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.1

3.0

CUDA

3.0

5.1

Shader Model

5.1

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