NVIDIA GeForce GTX 980 vs NVIDIA GeForce GTX 660 Rev. 2

VS

NVIDIA GeForce GTX 980

NVIDIA GeForce GTX 660 Rev. 2

We compared two Desktop platform GPUs: 4GB VRAM GeForce GTX 980 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

NVIDIA GeForce GTX 980 's Advantages

Boost Clock has increased by 18% (1216MHz vs 1032MHz)

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (224.4GB/s vs 144.2GB/s)

1088 additional rendering cores

NVIDIA GeForce GTX 660 Rev. 2 's Advantages

Lower TDP (140W vs 165W)

Score

Benchmark

FP32 (float)

GeForce GTX 980 +151%

4.981 TFLOPS

GeForce GTX 660 Rev. 2

1.981 TFLOPS

GeForce GTX 980

VS

GeForce GTX 660 Rev. 2

Graphics Card

Sep 2014

Release Date

Sep 2014

GeForce 900

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1127 MHz

Base Clock

980 MHz

1216 MHz

Boost Clock

1032 MHz

1753 MHz

Memory Clock

1502 MHz

Memory

4GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

192bit

224.4GB/s

Bandwidth

144.2GB/s

Render Config

-

2048

Shading Units

960

128

TMUs

80

64

ROPs

24

-

48 KB (per SMM)

L1 Cache

16 KB (per SMX)

2 MB

L2 Cache

384 KB

-

Theoretical Performance

77.82 GPixel/s

Pixel Rate

20.64 GPixel/s

155.6 GTexel/s

Texture Rate

82.56 GTexel/s

-

4.981 TFLOPS

FP32 (float)

1.981 TFLOPS

155.6 GFLOPS

FP64 (double)

82.56 GFLOPS

Board Design

165W

TDP

140W

450 W

Suggested PSU

300 W

1x DVI 1x HDMI 2.0 3x DisplayPort 1.4a

Outputs

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

2x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

GM204

GPU Name

GK104

GM204-400-A1

GPU Variant

-

Maxwell 2.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

5.2 billion

Transistors

3.54 billion

398 mm²

Die Size

294 mm²

Graphics Features

12 (12_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.3

Vulkan

1.1

5.2

CUDA

3.0

6.4

Shader Model

5.1

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