Product comparison · 2 motherboards

ASUS F1A55-M LK R2.0 vs ASUS M5A99FX PRO R2.0

56specifications compared
21differ
35identical
20known for one product only

Key differences

The ASUS M5A99FX PRO R2.0 has 2 more memory slots than the ASUS F1A55-M LK R2.0 (4 vs 2). The ASUS M5A99FX PRO R2.0 has 1 more USB 2.0 connectors than the ASUS F1A55-M LK R2.0 (3 vs 2). The ASUS M5A99FX PRO R2.0 has 2 more chassis fan connectors than the ASUS F1A55-M LK R2.0 (3 vs 1). Only the ASUS F1A55-M LK R2.0 has on-board graphics card. Processor socket: Socket FM1 on the ASUS F1A55-M LK R2.0, Socket AM3+ on the ASUS M5A99FX PRO R2.0.

Processor socket
- F1A55-M LK R2.0:Socket FM1
- M5A99FX PRO R2.0:Socket AM3+
Number of memory slots
- F1A55-M LK R2.0:2
- M5A99FX PRO R2.0:4
ECC сompatibility
- F1A55-M LK R2.0:Non-ECC
- M5A99FX PRO R2.0:ECC & Non-ECC
Supported storage drive interfaces
- F1A55-M LK R2.0:SATA II
- M5A99FX PRO R2.0:SATA III
On-board graphics card
- F1A55-M LK R2.0:Yes
- M5A99FX PRO R2.0:No
USB 2.0 connectors
- F1A55-M LK R2.0:2
- M5A99FX PRO R2.0:3
Number of chassis fan connectors
- F1A55-M LK R2.0:1
- M5A99FX PRO R2.0:3
USB 2.0 ports quantity
- F1A55-M LK R2.0:4
- M5A99FX PRO R2.0:8

Side by side

Differences highlightedShow differences only

Comparison of F1A55-M LK R2.0, M5A99FX PRO R2.0
76 specifications	A ASUS F1A55-M LK R2.0 View product	B ASUS M5A99FX PRO R2.0 View product
Processor2 differ
Processor manufacturer	AMD	AMD
Processor socketDiffers	Socket FM1	Socket AM3+
Compatible processor seriesDiffers	AMD A, AMD E2	AMD Phenom II X2, AMD Phenom II X3, AMD Phenom II X4, AMD Phenom II X6, AMD Phenom II X8
Maximum number of SMP processors	1	1
Memory2 differ
Supported memory types	DDR3-SDRAM	DDR3-SDRAM
Number of memory slotsDiffers	2	4
Memory slots type	DIMM	DIMM
Memory channels	Dual-channel	Dual-channel
ECC сompatibilityDiffers	Non-ECC	ECC & Non-ECC
Supported memory clock speeds	1066,1333,1600,1866 MHz	1066,1333,1600,1866 MHz
Maximum internal memory	32 GB	32 GB
Unbuffered memory	Yes	Yes
Storage controllers1 differ
Supported storage drive interfacesDiffers	SATA II	SATA III
RAID levelsKnown for one	0, 1, 10, JBOD	Unknown — not stated by the source
Graphics2 differ
Parallel processing technology supportDiffers	LucidLogix Virtu	Quad-GPU CrossFireX, Quad-GPU SLI
On-board graphics cardDiffers	Yes	No
Discrete graphics support	Yes	Yes
Graphics cardKnown for one	Radeon HD 6000	Unknown — not stated by the source
Maximum resolutionKnown for one	1920 x 1200 pixels	Unknown — not stated by the source
DirectX versionKnown for one	11	Unknown — not stated by the source
Internal I/O2 differ
USB 2.0 connectorsDiffers	2	3
USB 3.2 Gen 1 (3.1 Gen 1) connectorsKnown for one	Unknown — not stated by the source	1
Number of SATA III connectorsKnown for one	Unknown — not stated by the source	7
S/PDIF out connectorKnown for one	Unknown — not stated by the source	Yes
Front panel audio connector	Yes	Yes
ATX Power connector (24-pin)	Yes	Yes
Number of EATX power connectors	1	1
CPU fan connector	Yes	Yes
Number of chassis fan connectorsDiffers	1	3
Chassis intrusion connector	Yes	Yes
EPS power connector (8-pin)Known for one	Unknown — not stated by the source	Yes
Number of COM connectors	1	1
TPM connectorKnown for one	Unknown — not stated by the source	Yes
Number of SATA II connectorsKnown for one	4	Unknown — not stated by the source
Rear panel I/O ports1 differ
USB 2.0 ports quantityDiffers	4	8
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityKnown for one	Unknown — not stated by the source	2
Ethernet LAN (RJ-45) ports	1	1
eSATA ports quantityKnown for one	Unknown — not stated by the source	1
PS/2 ports quantity	2	2
Microphone in	Yes	Yes
Digital audio optical outKnown for one	Unknown — not stated by the source	1
VGA (D-Sub) ports quantityKnown for one	1	Unknown — not stated by the source
DVI-D ports quantityKnown for one	1	Unknown — not stated by the source
Networkidentical
Ethernet LAN	Yes	Yes
Ethernet interface type	Gigabit Ethernet	Gigabit Ethernet
LAN controllerKnown for one	Unknown — not stated by the source	Realtek RTL8111F
Features3 differ
Component for	PC	PC
Motherboard form factorDiffers	micro ATX	ATX
Motherboard chipset family	AMD	AMD
Motherboard chipsetDiffers	AMD A55	AMD 990FX
Motherboard southbridgeKnown for one	Unknown — not stated by the source	AMD SB950
Audio chipDiffers	Realtek ALC887	Realtek ALC892
Audio output channels	7.1 channels	7.1 channels
Cooling type	Passive	Passive
Power source type	ATX	ATX
Compatible operating systemsKnown for one	Unknown — not stated by the source	Windows 7 Windows 8
Expansion slots2 differ
PCI Express x1 slots	1	1
PCI Express x16 slotsDiffers	1	4
PCI Express configurationsDiffers	1x1, 1x16	1x1, 2x4, 2x16
PCI Express slots version	2.0	2.0
PCI slots	1	1
BIOSidentical
BIOS type	UEFI	UEFI
BIOS memory size	64 Mbit	64 Mbit
ACPI version	2.0a	2.0a
Clear CMOS jumperKnown for one	Unknown — not stated by the source	Yes
Weight & dimensions2 differ
WidthDiffers	226 mm	305 mm
DepthDiffers	186 mm	244 mm
Packaging content1 differ
Cables includedDiffers	SATA	CrossFire, SATA
Drivers included	Yes	Yes
Trial software	Antivirus	Antivirus
Bundled software	ASUS Utilities ASUS Update	ASUS Utilities ASUS Update
Other features3 differ
Controller 2nd interface typeKnown for one	Unknown — not stated by the source	ASMedia
Controller interface typeDiffers	AMD A55	AMD SB950
Audio outputDiffers	3	6
PCI Express slots quantityDiffers	2	5
Quick installation guide	Yes	Yes

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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