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Introduction

Let’s take a look at the Gigabyte 990FXA-UD3, a mid-range socket AM3+ motherboard for AMD FX processors, based on the 990FX chipset. Let’s see what this motherboard has to offer.

The AMD 990FX chipset is basically an AMD 890FX chipset with a new name and supports the higher HyperTransport 3.0 speeds (up to 10.4 GB/s a.k.a. 5.2 GT/s) that weren’t used before and are supported by the FX processors from AMD.

So far, Gigabyte has launched four different motherboard models based on the AMD 990FX chipset; we list the differences between them in the table below. Prices were researched at Newegg.com on the day we published this article.

Specification

990FXA-D3

990FXA-UD3

990FXA-UD5

990FXA-UD7

Form Factor

ATX

ATX

ATX

E-ATX

Memory Sockets

4

4

4

4

PCI Express x16 2.0

4 (x16/x16/x4/x4)

4 (x16/x16/x4/x4)

5 (x16/x16/x0/x4/x4 or x16/x8/x8/x4/x4)

6 (x16/x16/x0/x0/x4/x4 or x16/x8/x0/x8/x4/x4 or x8/x8/x8/x8/x4/x4)

PCI Express x1 2.0

2

2

1

0

Standard PCI

1

1

1

1

CrossFireX

Yes

Yes

Yes

Yes

SLI

Yes

Yes

Yes

Yes

SATA-300

0

0

0

0

SATA-600

6

6

8

8

eSATA-300

0

0

0

0

eSATA-600

0

2

2

2

USB 2.0

14

14

14

14

USB 3.0

2

4

4

4

FireWire

0

2

2

2

Gigabit Ethernet

1

1

1

1

Audio

ALC889

ALC889

ALC889

ALC889

Voltage Regulator

4+1

8+2

8+2

8+2

Price

NA

USD 138

USD 170

NA

You can see the Gigabyte 990FXA-UD3 motherboard in Figure 1.

Gigabyte 990FXA-UD3Figure 1: Gigabyte 990FXA-UD3 motherboard

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Rafael Otto Coelho is a physicist with a master's degree in Education, and is a college professor in Brazil.