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Product name	Z77A-GD65	Z77A-GD55
Platform	Intel 1155	Intel 1155
Form Factor	ATX	ATX
Chipset - NorthBridge	Z77	Z77
PWM MOSFET	DrMOS ll	DrMOS ll
PWM Capacitors	Hi-C CAP	Hi-C CAP
Cooling Type	HeatPipe	Heatsink + PWM
Cooling Mounting	Metal Screws	Metal Screws
Mem Type	DDR3	DDR3
Mem Dimm	4x	4x
Expansion PCI-E x16	3x (16/0/0), (8/8/0)	1
Expansion PCI-E x1	4	4
Multi-GPU Support	SLI / CFX	SLI / CFX
Storage SATA2	4	4
Storage SATA3	4	2
LAN	1x Gb LAN	1x Gb LAN
USB2 (R/F)	4 / 6	4 / 6
USB3 (R/F)	2 / 2	2 / 2
Audio channels	6.1	6.1
Audio codec	THX	THX
SPDIF I/O (Optical/Coaxial)	Y / Y	Y / Y
GPU Name	Intel® HD Graphics 4000 *	Intel® HD Graphics 4000 *
Display D-SUB	Y	Y
Display DVI	-D	-D
Display HDMI	1.4a	1.4a
Buttons	ClrCMOS / Power / Reset	ClrCMOS / Power / Reset
UEFI	Y	Y
BIOS Backup	2x	-