NVIDIA GeForce GTX 660 OEM vs AMD Radeon HD 6490

VS

NVIDIA GeForce GTX 660 OEM

AMD Radeon HD 6490

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GTX 660 OEM and 1024MB VRAM Radeon HD 6490 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 OEM 's Advantages

Released 1 years and 1 months late

Boost Clock888MHz

More VRAM (1536GB vs 1024GB)

Larger VRAM bandwidth (134.4GB/s vs 16.00GB/s)

832 additional rendering cores

AMD Radeon HD 6490 's Advantages

Lower TDP (39W vs 130W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 OEM +481%

2.046 TFLOPS

Radeon HD 6490

0.352 TFLOPS

GeForce GTX 660 OEM

VS

Radeon HD 6490

Graphics Card

Aug 2012

Release Date

Jul 2011

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

500 MHz

Memory

1536MB

Memory Size

1024MB

GDDR5

Memory Type

DDR2

192bit

Memory Bus

128bit

134.4GB/s

Bandwidth

16.00GB/s

Render Config

-

Compute Units

4

-

1152

Shading Units

320

96

TMUs

16

24

ROPs

8

-

16 KB (per SMX)

L1 Cache

8 KB (per CU)

384 KB

L2 Cache

256 KB

-

Theoretical Performance

21.31 GPixel/s

Pixel Rate

4.400 GPixel/s

85.25 GTexel/s

Texture Rate

8.800 GTexel/s

-

2.046 TFLOPS

FP32 (float)

352.0 GFLOPS

85.25 GFLOPS

FP64 (double)

-

Board Design

130W

TDP

39W

300 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

1x 6-pin

Power Connectors

None

Graphics Processor

GK104

GPU Name

Redwood

GK104-200-KD-A2

GPU Variant

Redwood LE

Kepler

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

3.54 billion

Transistors

0.627 billion

294 mm²

Die Size

104 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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