ASUS X99-A
Chipset
Socket 
FSB speed Empty
Form factorATX (max 305 x 244 mm)
Dimensions305mm x 244mm
Cache
None/Integrated in the CPU
Max RAM size
64GB
RAM type DDR4 UDIMM
PSU connector
I/O ports1x
3.5mm Audio Combo
1x
PS/2 KB+MS Combo
1x
RJ-45 LAN
1x
SATA Express
8x
SATA III
1x
Serial
1x
Toslink
8x
USB 2.0
10x
USB 3.0
Expansion slots1x
M.2 (M key)
2x
PCIe x1
3x
PCIe x16
1x
PCIe x16 @ x4
Notes
40-Lane CPUs: 3 x PCI Express 3.0/2.0 x16 slots (single at x16, dual at x16/x16, triple at x16/x16/x8)
28-Lane CPUs: 3 x PCI Express 3.0/2.0 x16 slots (single at x16, dual at x16/x8, triple at x16/x8/x4)
The PCIe x16 @ x4 slot shares bandwidth with M.2 x4, when M.2 socket is occupied, the PCIe x16 @ x4 slot will be disabled.
Supports NVIDIA 3-WAY/Quad GPU SLI and AMD 3-WAY/Quad-GPU CrossFireX
Last updated 2025-12-30T15:06:32Z
Board info score is 8.8/10
Chips
-> Chipset part
-> Audio
-> Network
-> USB ctrl.
CPU family support
21 BIOS files available
AMI - 21 entries
POST string
Note
Core Ver.
BIOS Ver.
Logs
1 driver available
Name
Version
OS support
Arch
Size
Filename
Name
Version
1.16.32.1
OS support
Windows 10
Windows 7
Windows 8.x
Windows Vista
Arch
x86
, x86-64
, IA-64
Size
8.9MB
Filename
1 board document available
Release date
File
Logs
Chip
Release date
File
Logs
Chip
Release date
2019-12-23
File
Logs
Chip
Release date
File
Logs
Image 1 of 4 (ASUS)
Image 2 of 4 (ASUS)
Image 3 of 4 (ASUS)
Image 4 of 4 (ASUS)
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