Product comparison · 2 motherboards

ASUS Z77-A Intel Z77 LGA 1155 (Socket H2) ATX vs GIGABYTE GA-Z77-HD4 motherboard Intel® Z77 Express LGA 1155 (Socket H2) ATX

56specifications compared
10differ
46identical
41known for one product only

Key differences

The GIGABYTE GA-Z77-HD4 motherboard Intel® Z77 Express LGA 1155 (Socket H2) ATX has 1 more chassis fan connectors than the ASUS Z77-A Intel Z77 LGA 1155 (Socket H2) ATX (3 vs 2). The ASUS Z77-A Intel Z77 LGA 1155 (Socket H2) ATX has 1 more PS/2 ports quantity than the GIGABYTE GA-Z77-HD4 motherboard Intel® Z77 Express LGA 1155 (Socket H2) ATX (2 vs 1). The ASUS Z77-A Intel Z77 LGA 1155 (Socket H2) ATX has 2 a more ACPI version than the GIGABYTE GA-Z77-HD4 motherboard Intel® Z77 Express LGA 1155 (Socket H2) ATX (4.0a vs 2.0a). Supported memory clock speeds: 1066,1333,1600,1866,2133,2200,2400 MHz on the ASUS Z77-A Intel Z77 LGA 1155 (Socket H2) ATX, 1066,1333,1600,2800 MHz on the GIGABYTE GA-Z77-HD4 motherboard Intel® Z77 Express LGA 1155 (Socket H2) ATX. Parallel processing technology support: Quad-GPU CrossFireX on the ASUS Z77-A Intel Z77 LGA 1155 (Socket H2) ATX, 2-Way CrossFireX on the GIGABYTE GA-Z77-HD4 motherboard Intel® Z77 Express LGA 1155 (Socket H2) ATX.

Parallel processing technology support
- Z77-A Intel Z77 LGA 1155 (Socket H2) ATX:Quad-GPU CrossFireX
- GA-Z77-HD4 motherboard Intel® Z77 Express LGA 1155 (Socket H2) ATX:2-Way CrossFireX
Maximum resolution
- Z77-A Intel Z77 LGA 1155 (Socket H2) ATX:2048 x 1536 pixels
- GA-Z77-HD4 motherboard Intel® Z77 Express LGA 1155 (Socket H2) ATX:2560 x 1600 pixels
Number of chassis fan connectors
- Z77-A Intel Z77 LGA 1155 (Socket H2) ATX:2
- GA-Z77-HD4 motherboard Intel® Z77 Express LGA 1155 (Socket H2) ATX:3
PS/2 ports quantity
- Z77-A Intel Z77 LGA 1155 (Socket H2) ATX:2
- GA-Z77-HD4 motherboard Intel® Z77 Express LGA 1155 (Socket H2) ATX:1
Motherboard chipset
- Z77-A Intel Z77 LGA 1155 (Socket H2) ATX:Intel Z77
- GA-Z77-HD4 motherboard Intel® Z77 Express LGA 1155 (Socket H2) ATX:Intel® Z77 Express
BIOS type
- Z77-A Intel Z77 LGA 1155 (Socket H2) ATX:UEFI AMI
- GA-Z77-HD4 motherboard Intel® Z77 Express LGA 1155 (Socket H2) ATX:EFI AMI
ACPI version
- Z77-A Intel Z77 LGA 1155 (Socket H2) ATX:4.0a
- GA-Z77-HD4 motherboard Intel® Z77 Express LGA 1155 (Socket H2) ATX:2.0a
Depth
- Z77-A Intel Z77 LGA 1155 (Socket H2) ATX:213 mm
- GA-Z77-HD4 motherboard Intel® Z77 Express LGA 1155 (Socket H2) ATX:215 mm

Side by side

Differences highlightedShow differences only

Comparison of Z77-A, GA-Z77-HD4
97 specifications	A ASUS Z77-A Intel Z77 LGA 1155 (Socket H2) ATX Model Z77-A View product	B GIGABYTE GA-Z77-HD4 motherboard Intel® Z77 Express LGA 1155 (Socket H2) ATX Model GA-Z77-HD4 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	1	Unknown — not stated by the source
System bus rateKnown for one	5 GT/s	Unknown — not stated by the source
Intel Core i3/i5/i7/i9 seriesKnown for one	Unknown — not stated by the source	i3-3xxx, i5-3xxx, i7-3xxx
Memory1 differ
Supported memory types	DDR3-SDRAM	DDR3-SDRAM
Number of memory slots	4	4
Memory slots type	DIMM	DIMM
Memory channels	Dual-channel	Dual-channel
ECC сompatibility	Non-ECC	Non-ECC
Supported memory clock speedsDiffers	1066,1333,1600,1866,2133,2200,2400 MHz	1066,1333,1600,2800 MHz
Maximum internal memory	32 GB	32 GB
Unbuffered memoryKnown for one	Yes	Unknown — not stated by the source
Memory voltageKnown for one	Unknown — not stated by the source	1.5 V
Storage controllersidentical
Supported storage drive interfaces	SATA II, SATA III	SATA II, SATA III
RAID levelsKnown for one	0, 1, 5, 10	Unknown — not stated by the source
Graphics2 differ
Maximum graphics card memoryKnown for one	1696 MB	Unknown — not stated by the source
Parallel processing technology supportDiffers	Quad-GPU CrossFireX	2-Way CrossFireX
Graphics card family	Intel	Intel
Maximum resolutionDiffers	2048 x 1536 pixels	2560 x 1600 pixels
DirectX version	11	11
Discrete graphics support	Yes	Yes
Internal I/O1 differ
USB 2.0 connectors	2	2
USB 3.2 Gen 1 (3.1 Gen 1) connectors	1	1
Number of SATA III connectors	2	2
Number of SATA II connectors	4	4
Number of Parallel ATA connectors	0	0
S/PDIF out connector	Yes	Yes
Front panel audio connector	Yes	Yes
ATX Power connector (24-pin)	Yes	Yes
Number of EATX power connectorsKnown for one	1	Unknown — not stated by the source
Power fan connectorKnown for one	Yes	Unknown — not stated by the source
CPU fan connector	Yes	Yes
Number of chassis fan connectorsDiffers	2	3
EPS power connector (8-pin)	Yes	Yes
Number of COM connectorsKnown for one	1	Unknown — not stated by the source
TPM connectorKnown for one	Unknown — not stated by the source	Yes
Rear panel I/O ports1 differ
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 quantityDiffers	2	1
Firewire (IEEE 1394) ports	0	0
VGA (D-Sub) ports quantity	1	1
HDMI ports quantity	1	1
HDMI versionKnown for one	1.4a	Unknown — not stated by the source
DVI-D ports quantity	1	1
Headphone outputs	1	1
Microphone in	Yes	Yes
Serial ports quantityKnown for one	0	Unknown — not stated by the source
DisplayPorts quantityKnown for one	Unknown — not stated by the source	1
S/PDIF out portKnown for one	Unknown — not stated by the source	Yes
Digital audio optical outKnown for one	Unknown — not stated by the source	1
Networkidentical
Ethernet LAN	Yes	Yes
Ethernet interface type	Gigabit Ethernet	Gigabit Ethernet
LAN controllerKnown for one	Realtek RTL8111F	Unknown — not stated by the source
Wake-on-LAN readyKnown for one	Yes	Unknown — not stated by the source
Wi-FiKnown for one	No	Unknown — not stated by the source
BluetoothKnown for one	No	Unknown — not stated by the source
Features2 differ
Component for	PC	PC
Motherboard form factor	ATX	ATX
Motherboard chipset family	Intel	Intel
Motherboard chipsetDiffers	Intel Z77	Intel® Z77 Express
Audio chip	Realtek ALC887	Realtek ALC887
Audio output channels	7.1 channels	7.1 channels
Cooling type	Passive	Passive
Power source type	ATX	ATX
Windows operating systems supportedDiffers	Yes	Windows 7 Home Basic, Windows 7 Home Basic x64, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x64, Win
CertificationKnown for one	RoHS	Unknown — not stated by the source
Overclocking featuresKnown for one	ASUS C.P.R.	Unknown — not stated by the source
PC health monitoringKnown for one	Unknown — not stated by the source	CPU, Fan, Power supply, Temperature
Expansion slotsidentical
PCI Express x1 slotsKnown for one	2	Unknown — not stated by the source
PCI Express x16 slotsKnown for one	2	Unknown — not stated by the source
PCI Express configurationsKnown for one	2x1, 2x16	Unknown — not stated by the source
PCI Express slots versionKnown for one	2.0, 3.0	Unknown — not stated by the source
PCI slots	2	2
PCI Express x1 (Gen 2.x) slotsKnown for one	Unknown — not stated by the source	2
PCI Express x16 (Gen 2.x) slotsKnown for one	Unknown — not stated by the source	1
PCI Express x16 (Gen 3.x) slotsKnown for one	Unknown — not stated by the source	1
BIOS2 differ
BIOS typeDiffers	UEFI AMI	EFI AMI
BIOS memory size	64 Mbit	64 Mbit
ACPI versionDiffers	4.0a	2.0a
Clear CMOS jumper	Yes	Yes
Weight & dimensions1 differ
Width	305 mm	305 mm
DepthDiffers	213 mm	215 mm
Packaging contentidentical
Cables includedKnown for one	SATA	Unknown — not stated by the source
Drivers includedKnown for one	Yes	Unknown — not stated by the source
Trial softwareKnown for one	Antivirus	Unknown — not stated by the source
Bundled softwareKnown for one	ASUS Utilities ASUS Update	Unknown — not stated by the source
Other featuresidentical
Controller interface typeKnown for one	Intel Z77	Unknown — not stated by the source
Quick installation guideKnown for one	Yes	Unknown — not stated by the source
Dual Link DVIKnown for one	Unknown — not stated by the source	Yes
Number of processors supportedKnown for one	Unknown — not stated by the source	1
PCI Express slots quantityKnown for one	Unknown — not stated by the source	4
Serial port via internal headerKnown for one	Unknown — not stated by the source	Yes
Processor special featuresidentical
Trusted Platform Module (TPM)Known 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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