AMD Radeon HD 8490 OEM vs NVIDIA GeForce GTX 660

VS

AMD Radeon HD 8490 OEM

NVIDIA GeForce GTX 660

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 8490 OEM and 2GB VRAM GeForce GTX 660 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8490 OEM 's Advantages

Released 10 months late

Lower TDP (35W vs 140W)

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

Score

Benchmark

FP32 (float)

Radeon HD 8490 OEM

0.28 TFLOPS

GeForce GTX 660 +607%

1.981 TFLOPS

Radeon HD 8490 OEM

VS

GeForce GTX 660

Graphics Card

Jul 2013

Release Date

Sep 2012

Sea Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

980 MHz

-

Boost Clock

1032 MHz

900 MHz

Memory Clock

1502 MHz

Memory

1024MB

Memory Size

2GB

DDR3

Memory Type

GDDR5

64bit

Memory Bus

192bit

14.40GB/s

Bandwidth

144.2GB/s

Render Config

2

Compute Units

-

160

Shading Units

960

8

TMUs

80

4

ROPs

24

-

8 KB (per CU)

L1 Cache

16 KB (per SMX)

128 KB

L2 Cache

384 KB

-

Theoretical Performance

3.500 GPixel/s

Pixel Rate

20.64 GPixel/s

7.000 GTexel/s

Texture Rate

82.56 GTexel/s

-

280.0 GFLOPS

FP32 (float)

1.981 TFLOPS

-

FP64 (double)

82.56 GFLOPS

Board Design

35W

TDP

140W

200 W

Suggested PSU

300 W

1x DVI 1x DisplayPort 1.1

Outputs

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

None

Power Connectors

1x 6-pin

Graphics Processor

Caicos

GPU Name

GK106

Caicos XTX

GPU Variant

GK106-400-A1

TeraScale 2

Architecture

Kepler

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

0.37 billion

Transistors

2.54 billion

67 mm²

Die Size

221 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (11_0)

4.4

OpenGL

4.6

1.2

OpenCL

3.0

N/A

Vulkan

1.1

-

CUDA

3.0

5.0

Shader Model

5.1

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