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

VS

NVIDIA GeForce GTX 660 OEM

AMD Radeon HD 6850 1440SP Edition

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GTX 660 OEM 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 OEM 's Advantages

Boost Clock888MHz

More VRAM (1536GB vs 1024GB)

Larger VRAM bandwidth (134.4GB/s vs 128.0GB/s)

Lower TDP (130W vs 151W)

AMD Radeon HD 6850 1440SP Edition 's Advantages

288 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GTX 660 OEM

2.046 TFLOPS

Radeon HD 6850 1440SP Edition +2%

2.088 TFLOPS

GeForce GTX 660 OEM

VS

Radeon HD 6850 1440SP Edition

Graphics Card

Aug 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

823 MHz

Base Clock

-

888 MHz

Boost Clock

-

1400 MHz

Memory Clock

1000 MHz

Memory

1536MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

256bit

134.4GB/s

Bandwidth

128.0GB/s

Render Config

-

Compute Units

18

-

1152

Shading Units

1440

96

TMUs

72

24

ROPs

32

-

16 KB (per SMX)

L1 Cache

8 KB (per CU)

384 KB

L2 Cache

512 KB

-

Theoretical Performance

21.31 GPixel/s

Pixel Rate

23.20 GPixel/s

85.25 GTexel/s

Texture Rate

52.20 GTexel/s

-

2.046 TFLOPS

FP32 (float)

2.088 TFLOPS

85.25 GFLOPS

FP64 (double)

417.6 GFLOPS

Board Design

130W

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 Processor

GK104

GPU Name

Cypress

GK104-200-KD-A2

GPU Variant

Cypress PRO (215-0735043)

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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