NVIDIA GeForce GTX 660 vs AMD Radeon HD 8490 OEM

VS

NVIDIA GeForce GTX 660

AMD Radeon HD 8490 OEM

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 and 1024MB VRAM Radeon HD 8490 OEM 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 1024GB)

Larger VRAM bandwidth (144.2GB/s vs 14.40GB/s)

800 additional rendering cores

AMD Radeon HD 8490 OEM 's Advantages

Released 10 months late

Lower TDP (35W vs 140W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 +607%

1.981 TFLOPS

Radeon HD 8490 OEM

0.28 TFLOPS

GeForce GTX 660

VS

Radeon HD 8490 OEM

Graphics Card

Sep 2012

Release Date

Jul 2013

GeForce 600

Generation

Sea 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

900 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

DDR3

192bit

Memory Bus

64bit

144.2GB/s

Bandwidth

14.40GB/s

Render Config

-

Compute Units

2

-

960

Shading Units

160

80

TMUs

8

24

ROPs

4

-

16 KB (per SMX)

L1 Cache

8 KB (per CU)

384 KB

L2 Cache

128 KB

-

Theoretical Performance

20.64 GPixel/s

Pixel Rate

3.500 GPixel/s

82.56 GTexel/s

Texture Rate

7.000 GTexel/s

-

1.981 TFLOPS

FP32 (float)

280.0 GFLOPS

82.56 GFLOPS

FP64 (double)

-

Board Design

140W

TDP

35W

300 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x DisplayPort 1.1

1x 6-pin

Power Connectors

None

Graphics Processor

GK106

GPU Name

Caicos

GK106-400-A1

GPU Variant

Caicos XTX

Kepler

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

2.54 billion

Transistors

0.37 billion

221 mm²

Die Size

67 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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