ASUS X99-A/USB 3.1 vs ASUS X99-Pro/USB 3.1

Comparison of X99-A/USB 3.1, X99-Pro/USB 3.1

65 specifications	A ASUS X99-A/USB 3.1View product	B ASUS X99-Pro/USB 3.1View product
Processoridentical
Processor manufacturer	Intel	Intel
Processor socket	LGA 2011-v3	LGA 2011-v3
Compatible processor series	Intel® Core™ i7	Intel® Core™ i7
Memoryidentical
Supported memory types	DDR4-SDRAM	DDR4-SDRAM
Number of memory slots	8	8
Memory slots type	DIMM	DIMM
Memory channelsKnown for one	—Unknown — not stated by the source	Quad-channel
ECC сompatibility	Non-ECC	Non-ECC
Supported memory clock speeds	2400,2666,2800,3000,3200,3300 MHz	2400,2666,2800,3000,3200,3300 MHz
Maximum internal memory	64 GB	64 GB
Unbuffered memory	Yes	Yes
Storage controllersidentical
Supported storage drive interfaces	SATA III	SATA III
RAID levels	0, 1, 5, 10	0, 1, 5, 10
Graphicsidentical
Parallel processing technology support	3-Way CrossFireX, 3-Way SLI, Quad-GPU CrossFireX, Quad-GPU SLI	3-Way CrossFireX, 3-Way SLI, Quad-GPU CrossFireX, Quad-GPU SLI
Internal I/Oidentical
USB 2.0 connectors	2	2
USB 3.2 Gen 1 (3.1 Gen 1) connectors	2	2
Number of SATA III connectors	8	8
Number of SATA II connectors	0	0
Number of SATA connectorsKnown for one	—Unknown — not stated by the source	8
S/PDIF out connector	Yes	Yes
Front panel audio connectorKnown for one	—Unknown — not stated by the source	Yes
ATX Power connector (24-pin)	Yes	Yes
Number of EATX power connectors	1	1
CPU fan connector	Yes	Yes
Number of chassis fan connectors	4	4
Chassis intrusion connector	Yes	Yes
EPS power connector (8-pin)	Yes	Yes
Number of COM connectors	1	1
TPM connector	Yes	Yes
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	4	4
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity	2	2
Ethernet LAN (RJ-45) ports	1	1
eSATA ports quantity	0	0
PS/2 ports quantity	1	1
Firewire (IEEE 1394) ports	0	0
VGA (D-Sub) ports quantity	0	0
HDMI ports quantityKnown for one	—Unknown — not stated by the source	0
DVI-D ports quantityKnown for one	—Unknown — not stated by the source	0
Headphone outputs	1	1
Microphone in	Yes	Yes
S/PDIF out port	Yes	Yes
Networkidentical
Ethernet LAN	Yes	Yes
Ethernet interface type	Gigabit Ethernet	Gigabit Ethernet
LAN controller	Intel® I218-V	Intel® I218-V
Wi-FiKnown for one	—Unknown — not stated by the source	Yes
Wi-Fi standardsKnown for one	—Unknown — not stated by the source	802.11a, Wi-Fi 5 (802.11ac), 802.11b, 802.11g, Wi-Fi 4 (802.11n)
BluetoothKnown for one	—Unknown — not stated by the source	Yes
Bluetooth versionKnown for one	—Unknown — not stated by the source	4.0
Featuresidentical
Component for	PC	PC
Motherboard form factor	ATX	ATX
Motherboard chipset family	Intel	Intel
Motherboard chipset	Intel® X99	Intel® X99
Audio chip	Realtek ALC1150	Realtek ALC1150
Power source type	ATX	ATX
Audio output channelsKnown for one	7.1 channels	—Unknown — not stated by the source
Expansion slotsidentical
PCI Express x1 (Gen 2.x) slots	2	2
PCI Express x16 (Gen 2.x) slots	1	1
PCI Express x16 (Gen 3.x) slots	3	3
BIOSidentical
BIOS type	UEFI	UEFI
Clear CMOS jumper	Yes	Yes
Weight & dimensionsidentical
Width	305 mm	305 mm
Depth	244 mm	244 mm
Other featuresidentical
EZ plug connectorKnown for one	—Unknown — not stated by the source	Yes
Packaging contentidentical
Cables includedKnown for one	SATA	—Unknown — not stated by the source

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.