NVIDIA GeForce GTX 660 Ti vs AMD Radeon HD 6870 1600SP Edition

VS

NVIDIA GeForce GTX 660 Ti

AMD Radeon HD 6870 1600SP Edition

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Ti and 1024MB VRAM Radeon HD 6870 1600SP Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 Ti 's Advantages

Boost Clock980MHz

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (144.2GB/s vs 134.4GB/s)

Lower TDP (150W vs 175W)

AMD Radeon HD 6870 1600SP Edition 's Advantages

256 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GTX 660 Ti

2.634 TFLOPS

Radeon HD 6870 1600SP Edition +3%

2.72 TFLOPS

GeForce GTX 660 Ti

VS

Radeon HD 6870 1600SP Edition

Graphics Card

Aug 2012

Release Date

Jan 2013

GeForce 600

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

915 MHz

Base Clock

-

980 MHz

Boost Clock

-

1502 MHz

Memory Clock

1050 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

256bit

144.2GB/s

Bandwidth

134.4GB/s

Render Config

-

Compute Units

20

-

1344

Shading Units

1600

112

TMUs

80

24

ROPs

32

-

16 KB (per SMX)

L1 Cache

8 KB (per CU)

384 KB

L2 Cache

512 KB

-

Theoretical Performance

27.44 GPixel/s

Pixel Rate

27.20 GPixel/s

109.8 GTexel/s

Texture Rate

68.00 GTexel/s

-

2.634 TFLOPS

FP32 (float)

2.720 TFLOPS

109.8 GFLOPS

FP64 (double)

544.0 GFLOPS

Board Design

150W

TDP

175W

450 W

Suggested PSU

450 W

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

Outputs

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

2x 6-pin

Power Connectors

2x 6-pin

Graphics Processor

GK104

GPU Name

Cypress

GK104-300-KD-A2

GPU Variant

Cypress XT (215-0735033)

Kepler

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

3.54 billion

Transistors

2.154 billion

294 mm²

Die Size

334 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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