NVIDIA GeForce GTX 660 Rev. 2 vs AMD Radeon HD 6770 Green Edition

VS

NVIDIA GeForce GTX 660 Rev. 2

AMD Radeon HD 6770 Green Edition

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Rev. 2 and 2GB VRAM Radeon HD 6770 Green 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

Boost Clock1032MHz

Larger VRAM bandwidth (144.2GB/s vs 21.34GB/s)

240 additional rendering cores

AMD Radeon HD 6770 Green Edition 's Advantages

Lower TDP (86W vs 140W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 Rev. 2 +96%

1.981 TFLOPS

Radeon HD 6770 Green Edition

1.008 TFLOPS

GeForce GTX 660 Rev. 2

VS

Radeon HD 6770 Green Edition

Graphics Card

Sep 2014

Release Date

Apr 2013

GeForce 600

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

980 MHz

Base Clock

-

1032 MHz

Boost Clock

-

1502 MHz

Memory Clock

667 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR3

192bit

Memory Bus

128bit

144.2GB/s

Bandwidth

21.34GB/s

Render Config

-

Compute Units

9

-

960

Shading Units

720

80

TMUs

36

24

ROPs

16

-

16 KB (per SMX)

L1 Cache

8 KB (per CU)

384 KB

L2 Cache

256 KB

-

Theoretical Performance

20.64 GPixel/s

Pixel Rate

11.20 GPixel/s

82.56 GTexel/s

Texture Rate

25.20 GTexel/s

-

1.981 TFLOPS

FP32 (float)

1008 GFLOPS

82.56 GFLOPS

FP64 (double)

-

Board Design

140W

TDP

86W

300 W

Suggested PSU

250 W

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

Outputs

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

1x 6-pin

Power Connectors

-

Graphics Processor

GK104

GPU Name

Juniper

-

GPU Variant

Juniper LE (215-0754009)

Kepler

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

3.54 billion

Transistors

1.04 billion

294 mm²

Die Size

166 mm²

Graphics Features

12 (11_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

3.0

OpenCL

1.2

1.1

Vulkan

N/A

3.0

CUDA

-

5.1

Shader Model

5.0

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