NVIDIA GeForce GTX 660 OEM vs AMD Radeon Sky 900

VS

NVIDIA GeForce GTX 660 OEM

AMD Radeon Sky 900

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GTX 660 OEM and 3GB VRAM Radeon Sky 900 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 OEM 's Advantages

Lower TDP (130W vs 300W)

AMD Radeon Sky 900 's Advantages

Released 7 months late

Boost Clock has increased by 7% (950MHz vs 888MHz)

More VRAM (3GB vs 1536GB)

Larger VRAM bandwidth (240.0GB/s vs 134.4GB/s)

640 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GTX 660 OEM

2.046 TFLOPS

Radeon Sky 900 +66%

3.405 TFLOPS

GeForce GTX 660 OEM

VS

Radeon Sky 900

Graphics Card

Aug 2012

Release Date

Mar 2013

GeForce 600

Generation

Radeon Sky

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

823 MHz

Base Clock

825 MHz

888 MHz

Boost Clock

950 MHz

1400 MHz

Memory Clock

1250 MHz

Memory

1536MB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

384bit

134.4GB/s

Bandwidth

240.0GB/s

Render Config

-

Compute Units

28

-

1152

Shading Units

1792

96

TMUs

112

24

ROPs

32

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

768 KB

-

Theoretical Performance

21.31 GPixel/s

Pixel Rate

30.40 GPixel/s

85.25 GTexel/s

Texture Rate

106.4 GTexel/s

-

2.046 TFLOPS

FP32 (float)

3.405 TFLOPS

85.25 GFLOPS

FP64 (double)

851.2 GFLOPS

Board Design

130W

TDP

300W

300 W

Suggested PSU

700 W

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

Outputs

1x DVI 1x mini-DisplayPort 1.2

1x 6-pin

Power Connectors

2x 8-pin

Graphics Processor

GK104

GPU Name

Tahiti

GK104-200-KD-A2

GPU Variant

Orthrus

Kepler

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

3.54 billion

Transistors

4.313 billion

294 mm²

Die Size

352 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

3.0

OpenCL

1.2

1.1

Vulkan

1.2

3.0

CUDA

-

5.1

Shader Model

5.1

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