Product comparison · 2 motherboards

ASUS B75M-A Intel B75 LGA 1155 (Socket H2) micro ATX vs ASUS Z77-A Intel Z77 LGA 1155 (Socket H2) ATX

43specifications compared
15differ
28identical
40known for one product only

Key differences

The ASUS Z77-A Intel Z77 LGA 1155 (Socket H2) ATX has 2 more memory slots than the ASUS B75M-A Intel B75 LGA 1155 (Socket H2) micro ATX (4 vs 2). The ASUS Z77-A Intel Z77 LGA 1155 (Socket H2) ATX has 16 GB more maximum internal memory than the ASUS B75M-A Intel B75 LGA 1155 (Socket H2) micro ATX (32 GB vs 16 GB). The ASUS Z77-A Intel Z77 LGA 1155 (Socket H2) ATX has 1 more SATA III connectors than the ASUS B75M-A Intel B75 LGA 1155 (Socket H2) micro ATX (2 vs 1). Supported memory clock speeds: 1066,1333,1600,1800,2000,2200 MHz on the ASUS B75M-A Intel B75 LGA 1155 (Socket H2) micro ATX, 1066,1333,1600,1866,2133,2200,2400 MHz on the ASUS Z77-A Intel Z77 LGA 1155 (Socket H2) ATX. Parallel processing technology support: Not supported on the ASUS B75M-A Intel B75 LGA 1155 (Socket H2) micro ATX, Quad-GPU CrossFireX on the ASUS Z77-A Intel Z77 LGA 1155 (Socket H2) ATX.

Number of memory slots
- B75M-A Intel B75 LGA 1155 (Socket H2) micro ATX:2
- Z77-A Intel Z77 LGA 1155 (Socket H2) ATX:4
Maximum internal memory
- B75M-A Intel B75 LGA 1155 (Socket H2) micro ATX:16 GB
- Z77-A Intel Z77 LGA 1155 (Socket H2) ATX:32 GB
Parallel processing technology support
- B75M-A Intel B75 LGA 1155 (Socket H2) micro ATX:Not supported
- Z77-A Intel Z77 LGA 1155 (Socket H2) ATX:Quad-GPU CrossFireX
Number of SATA III connectors
- B75M-A Intel B75 LGA 1155 (Socket H2) micro ATX:1
- Z77-A Intel Z77 LGA 1155 (Socket H2) ATX:2
Number of SATA II connectors
- B75M-A Intel B75 LGA 1155 (Socket H2) micro ATX:5
- Z77-A Intel Z77 LGA 1155 (Socket H2) ATX:4
Motherboard form factor
- B75M-A Intel B75 LGA 1155 (Socket H2) micro ATX:micro ATX
- Z77-A Intel Z77 LGA 1155 (Socket H2) ATX:ATX
Motherboard chipset
- B75M-A Intel B75 LGA 1155 (Socket H2) micro ATX:Intel B75
- Z77-A Intel Z77 LGA 1155 (Socket H2) ATX:Intel Z77
PCI Express x16 slots
- B75M-A Intel B75 LGA 1155 (Socket H2) micro ATX:1
- Z77-A Intel Z77 LGA 1155 (Socket H2) ATX:2

Side by side

Differences highlightedShow differences only

Comparison of B75M-A, Z77-A
83 specifications	A ASUS B75M-A Intel B75 LGA 1155 (Socket H2) micro ATX Model B75M-A View product	B ASUS Z77-A Intel Z77 LGA 1155 (Socket H2) ATX Model Z77-A View product
Processoridentical
Maximum number of SMP processorsKnown for one	Unknown — not stated by the source	1
System bus rateKnown for one	Unknown — not stated by the source	5 GT/s
Memory3 differ
Number of memory slotsDiffers	2	4
ECC сompatibilityKnown for one	Unknown — not stated by the source	Non-ECC
Supported memory clock speedsDiffers	1066,1333,1600,1800,2000,2200 MHz	1066,1333,1600,1866,2133,2200,2400 MHz
Maximum internal memoryDiffers	16 GB	32 GB
Unbuffered memoryKnown for one	Unknown — not stated by the source	Yes
Storage controllersidentical
RAID levelsKnown for one	Unknown — not stated by the source	0, 1, 5, 10
Graphics1 differ
Maximum graphics card memoryKnown for one	Unknown — not stated by the source	1696 MB
Parallel processing technology supportDiffers	Not supported	Quad-GPU CrossFireX
Graphics card familyKnown for one	Unknown — not stated by the source	Intel
Maximum resolutionKnown for one	Unknown — not stated by the source	2048 x 1536 pixels
DirectX versionKnown for one	Unknown — not stated by the source	11
Discrete graphics supportKnown for one	Unknown — not stated by the source	Yes
Internal I/O2 differ
Number of SATA III connectorsDiffers	1	2
Number of SATA II connectorsDiffers	5	4
S/PDIF out connectorKnown for one	Unknown — not stated by the source	Yes
Front panel audio connectorKnown for one	Unknown — not stated by the source	Yes
ATX Power connector (24-pin)Known for one	Unknown — not stated by the source	Yes
Power fan connectorKnown for one	Unknown — not stated by the source	Yes
Number of chassis fan connectorsKnown for one	Unknown — not stated by the source	2
EPS power connector (8-pin)Known for one	Unknown — not stated by the source	Yes
Number of COM connectorsKnown for one	Unknown — not stated by the source	1
Number of SATA connectorsKnown for one	6	Unknown — not stated by the source
Rear panel I/O portsidentical
HDMI versionKnown for one	Unknown — not stated by the source	1.4a
Headphone outputsKnown for one	Unknown — not stated by the source	1
Microphone inKnown for one	Unknown — not stated by the source	Yes
Serial ports quantityKnown for one	Unknown — not stated by the source	0
Networkidentical
Ethernet LANKnown for one	Unknown — not stated by the source	Yes
Ethernet interface typeKnown for one	Unknown — not stated by the source	Gigabit Ethernet
LAN controllerKnown for one	Unknown — not stated by the source	Realtek RTL8111F
Wake-on-LAN readyKnown for one	Unknown — not stated by the source	Yes
Wi-FiKnown for one	Unknown — not stated by the source	No
BluetoothKnown for one	Unknown — not stated by the source	No
Features2 differ
Motherboard form factorDiffers	micro ATX	ATX
Motherboard chipsetDiffers	Intel B75	Intel Z77
Cooling typeKnown for one	Unknown — not stated by the source	Passive
Windows operating systems supportedKnown for one	Unknown — not stated by the source	Yes
CertificationKnown for one	Unknown — not stated by the source	RoHS
Overclocking featuresKnown for one	Unknown — not stated by the source	ASUS C.P.R.
Expansion slots2 differ
PCI Express x16 slotsDiffers	1	2
PCI Express configurationsKnown for one	Unknown — not stated by the source	2x1, 2x16
PCI slotsDiffers	1	2
BIOS3 differ
BIOS typeDiffers	AMI	UEFI AMI
BIOS memory sizeDiffers	128 Mbit	64 Mbit
ACPI versionDiffers	2.0a	4.0a
Clear CMOS jumperKnown for one	Unknown — not stated by the source	Yes
Weight & dimensions2 differ
WidthDiffers	244 mm	305 mm
DepthDiffers	178 mm	213 mm
Packaging contentidentical
Cables includedKnown for one	Unknown — not stated by the source	SATA
Drivers includedKnown for one	Unknown — not stated by the source	Yes
Trial softwareKnown for one	Unknown — not stated by the source	Antivirus
Bundled softwareKnown for one	Unknown — not stated by the source	ASUS Utilities ASUS Update
Other featuresidentical
Controller interface typeKnown for one	Unknown — not stated by the source	Intel Z77
Quick installation guideKnown for one	Unknown — not stated by the source	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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