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
Processor manufacturer	Intel	Intel
Processor socket	LGA 1155 (Socket H2)	LGA 1155 (Socket H2)
Compatible processor series	Intel® Celeron®, Intel® Pentium®	Intel® Celeron®, Intel® Pentium®
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
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 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
Supported storage drive interfaces	SATA II, SATA III	SATA II, SATA III
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
USB 2.0 connectors	2	2
USB 3.2 Gen 1 (3.1 Gen 1) connectors	1	1
Number of SATA III connectorsDiffers	1	2
Number of SATA II connectorsDiffers	5	4
Number of Parallel ATA connectors	0	0
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
Number of EATX power connectors	1	1
Power fan connectorKnown for one	Unknown — not stated by the source	Yes
CPU fan connector	Yes	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
USB 2.0 ports quantity	4	4
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	2	2
Ethernet LAN (RJ-45) ports	1	1
eSATA ports quantity	0	0
PS/2 ports quantity	2	2
Firewire (IEEE 1394) ports	0	0
VGA (D-Sub) ports quantity	1	1
HDMI ports quantity	1	1
HDMI versionKnown for one	Unknown — not stated by the source	1.4a
DVI-D ports quantity	1	1
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
Component for	PC	PC
Motherboard form factorDiffers	micro ATX	ATX
Motherboard chipset family	Intel	Intel
Motherboard chipsetDiffers	Intel B75	Intel Z77
Audio chip	Realtek ALC887	Realtek ALC887
Audio output channels	7.1 channels	7.1 channels
Cooling typeKnown for one	Unknown — not stated by the source	Passive
Power source type	ATX	ATX
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 x1 slots	2	2
PCI Express x16 slotsDiffers	1	2
PCI Express configurationsKnown for one	Unknown — not stated by the source	2x1, 2x16
PCI Express slots version	2.0, 3.0	2.0, 3.0
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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