Product comparison · 2 motherboards

ASUS A8N-SLI S939 vs GIGABYTE GA-M55SLI-S4 motherboard Socket AM2 ATX

35specifications compared
10differ
25identical
14known for one product only

Key differences

Processor socket
- A8N-SLI S939:Socket 939
- GA-M55SLI-S4 motherboard Socket AM2 ATX:Socket AM2
Number of Parallel ATA connectors
- A8N-SLI S939:2
- GA-M55SLI-S4 motherboard Socket AM2 ATX:0
Number of IEEE1394 connectors
- A8N-SLI S939:1
- GA-M55SLI-S4 motherboard Socket AM2 ATX:2
VGA (D-Sub) ports quantity
- A8N-SLI S939:0
- GA-M55SLI-S4 motherboard Socket AM2 ATX:1
Serial ports quantity
- A8N-SLI S939:0
- GA-M55SLI-S4 motherboard Socket AM2 ATX:1
Depth
- A8N-SLI S939:245 mm
- GA-M55SLI-S4 motherboard Socket AM2 ATX:244 mm
Audio output
- A8N-SLI S939:Realtek ALC850
- GA-M55SLI-S4 motherboard Socket AM2 ATX:Realtek ALC850 Audio codec
GAME/MIDI connector
- A8N-SLI S939:Yes
- GA-M55SLI-S4 motherboard Socket AM2 ATX:No

Side by side

Differences highlightedShow differences only

Comparison of A8N-SLI S939, GA-M55SLI-S4
49 specifications	A ASUS A8N-SLI S939 View product	B GIGABYTE GA-M55SLI-S4 motherboard Socket AM2 ATX Model GA-M55SLI-S4 View product
Processor1 differ
Processor manufacturer	AMD	AMD
Processor socketDiffers	Socket 939	Socket AM2
Maximum number of SMP processorsKnown for one	1	Unknown — not stated by the source
Memoryidentical
Number of memory slots	4	4
ECC сompatibilityKnown for one	ECC & Non-ECC	Unknown — not stated by the source
Maximum internal memoryKnown for one	4 GB	Unknown — not stated by the source
Storage controllersidentical
RAID levelsKnown for one	0, 1, 1+0	Unknown — not stated by the source
Internal I/O2 differ
USB 2.0 connectors	3	3
Number of SATA connectors	4	4
Number of Parallel ATA connectorsDiffers	2	0
S/PDIF out connector	No	No
Front panel audio connector	Yes	Yes
CD/AUX audio in	Yes	Yes
ATX Power connector (24-pin)	Yes	Yes
CPU fan connector	Yes	Yes
Chassis intrusion connector	Yes	Yes
Number of COM connectors	1	1
Number of IEEE1394 connectorsDiffers	1	2
Number of EATX power connectorsKnown for one	Unknown — not stated by the source	2
Number of chassis fan connectorsKnown for one	Unknown — not stated by the source	2
Rear panel I/O ports2 differ
USB 2.0 ports quantity	4	4
Ethernet LAN (RJ-45) ports	1	1
eSATA ports quantity	0	0
PS/2 ports quantity	2	2
Firewire (IEEE 1394) ports	1	1
VGA (D-Sub) ports quantityDiffers	0	1
Headphone outputs	1	1
Microphone in	Yes	Yes
S/PDIF out port	Yes	Yes
Parallel ports quantity	1	1
Serial ports quantityDiffers	0	1
Modem (RJ-11) ports	0	0
COM ports quantityKnown for one	Unknown — not stated by the source	1
Networkidentical
Networking featuresKnown for one	AI NET2	Unknown — not stated by the source
Featuresidentical
Motherboard form factor	ATX	ATX
Audio output channelsKnown for one	7.1 channels	Unknown — not stated by the source
Power source type	ATX	ATX
Compatible operating systemsKnown for one	Unknown — not stated by the source	Windows Linux
Expansion slots1 differ
Expansion slotsDiffers	- 2 x PCI Express x16 - 2 x PCI Express x1 - 3 x PCI	2 x PCI Express x 16 slot 3 x PCI Express x 1 slot 2 x PCI slots
BIOSidentical
BIOS memory sizeKnown for one	32 Mbit	Unknown — not stated by the source
Weight & dimensions1 differ
Width	305 mm	305 mm
DepthDiffers	245 mm	244 mm
Packaging content1 differ
Bundled softwareDiffers	- ASUS PC Probe - PC Health Monitoring - ASUS LiveUpdate - ASUS AI Booster - ASUS Cool 'n' Quiet - NVIDIA nTune - Anti-virus (OEM)	Drivers Utilities
Other features2 differ
Controller interface typeKnown for one	SATA 3Gb/s	Unknown — not stated by the source
Audio outputDiffers	Realtek ALC850	Realtek ALC850 Audio codec
Floppy disk drive connector	Yes	Yes
GAME/MIDI connectorDiffers	Yes	No
Azalia Digital Header (ADH) connectorKnown for one	Unknown — not stated by the source	No
EZ plug connectorKnown for one	Unknown — not stated by the source	No

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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