NVIDIA GeForce GTX 660 Rev. 2 vs ATI Radeon HD 3870 X2

VS

NVIDIA GeForce GTX 660 Rev. 2

ATI Radeon HD 3870 X2

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Rev. 2 and 512MB VRAM Radeon HD 3870 X2 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 6 years and 8 months late

Boost Clock1032MHz

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (144.2GB/s vs 57.66GB/s)

640 additional rendering cores

Lower TDP (140W vs 165W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 Rev. 2 +275%

1.981 TFLOPS

Radeon HD 3870 X2

0.528 TFLOPS

GeForce GTX 660 Rev. 2

VS

Radeon HD 3870 X2

Graphics Card

Sep 2014

Release Date

Jan 2008

GeForce 600

Generation

Radeon R600

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

901 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

192bit

Memory Bus

256bit

144.2GB/s

Bandwidth

57.66GB/s

Render Config

-

Compute Units

4

-

960

Shading Units

320

80

TMUs

16

24

ROPs

16

-

16 KB (per SMX)

L1 Cache

-

384 KB

L2 Cache

256 KB

-

Theoretical Performance

20.64 GPixel/s

Pixel Rate

13.20 GPixel/s

82.56 GTexel/s

Texture Rate

13.20 GTexel/s

-

1.981 TFLOPS

FP32 (float)

528.0 GFLOPS

82.56 GFLOPS

FP64 (double)

105.6 GFLOPS

Board Design

140W

TDP

165W

300 W

Suggested PSU

450 W

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

Outputs

2x DVI 1x S-Video

1x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

GK104

GPU Name

R680

-

GPU Variant

R680 XT (215-0708017)

Kepler

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

3.54 billion

Transistors

0.666 billion

294 mm²

Die Size

192 mm²

Graphics Features

12 (11_0)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3 (full) 4.0 (partial)

3.0

OpenCL

N/A

1.1

Vulkan

N/A

3.0

CUDA

-

5.1

Shader Model

4.1

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