NVIDIA GeForce GTX 660 vs AMD Radeon HD 6850 1440SP Edition

VS

NVIDIA GeForce GTX 660 AMD Radeon HD 6850 1440SP Edition

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 and 1024MB VRAM Radeon HD 6850 1440SP Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 's Advantages

Boost Clock1032MHz

More VRAM (2GB vs 1GB)

Larger VRAM bandwidth (144.2GB/s vs 128.0GB/s)

Lower TDP (140W vs 151W)

AMD Radeon HD 6850 1440SP Edition 's Advantages

480 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GTX 660

1.981 TFLOPS

Radeon HD 6850 1440SP Edition +5%

2.088 TFLOPS

GeForce GTX 660

VS

Radeon HD 6850 1440SP Edition

Graphics Card

Sep 2012

Release Date

Aug 2012

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

1000 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

256bit

144.2GB/s

Bandwidth

128.0GB/s

Render Config

-

SM Count

-

Compute Units

18

960

Shading Units

1440

80

TMUs

72

24

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

8 KB (per CU)

384 KB

L2 Cache

512 KB

Theoretical Performance

20.64 GPixel/s

Pixel Rate

23.20 GPixel/s

82.56 GTexel/s

Texture Rate

52.20 GTexel/s

-

FP16 (half)

-

1.981 TFLOPS

FP32 (float)

2.088 TFLOPS

82.56 GFLOPS

FP64 (double)

417.6 GFLOPS

Graphics Processor

GK106

GPU Name

Cypress

GK106-400-A1

GPU Variant

Cypress PRO (215-0735043)

Kepler

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

2.54 billion

Transistors

2.154 billion

221 mm²

Die Size

334 mm²

Board Design

140W

TDP

151W

300 W

Suggested PSU

450 W

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

Outputs

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

1x 6-pin

Power Connectors

2x 6-pin

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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