What motherboard does this have?

This is a dell proprietary system, all parts are made for or by Dell and you can not get any replacements from anywhere else. The MB is literally made for this case, has only the connections for this case and you can not add anything else. The MB even controls the front panel so if you ever have an issue with the front ports the whole MB will need to be replaced. Please check vids on YouTube and see how these are put together and how terrible they are. The 5900 they offer is not even a true 5900x, they use a trimmed down 5900 non X because they can turn down the power draw and make it not thermal throttle. Also use a custom bios that you can not change anything with, not even fan speed.

Brand	Alienware
Product Dimensions	52.91 x 22.43 x 51 cm; 590 g
Item model number	AWAUR15-A770BLK-PUS
Manufacturer	DELL
Series	Alienware Aurora R15 Gaming Desktop
Color	Dark Side
Form Factor	All-in-One
Resolution	3840x2160
Processor Brand	AMD
Processor Type	Ryzen 9
Processor Speed	5.6 GHz
Processor Socket	Socket AM4
Processor Count	1
RAM Size	32 GB
Memory Technology	DDR5
Computer Memory Type	DDR5 RAM
Maximum Memory Supported	64 GB
Memory Clock Speed	4800 MHz
Hard Drive Size	2 TB
Hard Disk Description	SSHD
Hard Drive Interface	Solid State
Hard Disk Rotational Speed	7200 RPM
Speaker Description	Onboard, Realtek high-performance Audio, No Speakers
Graphics Coprocessor	NVIDIA® GeForce RTX™ 4080
Graphics Chipset Brand	NVIDIA
Graphics Card Description	RTX 4080
Graphics RAM Type	Shared
Graphics Card Ram Size	16 GB
Graphics Card Interface	PCI Express
Connectivity Type	Bluetooth
Wireless Type	802.11ax
Number of USB 2.0 Ports	4
Number of USB 3.0 Ports	7
Hardware Platform	PC
Operating System	Windows 11 Home
Are Batteries Included	No
Item Weight	590 g

Alienware Aurora R15 Gaming Desktop - AMD Ryzen 9 7900X, 32GB DDR5 RAM, 1TB SSD+2TB HDD, NVIDIA GeForce RTX 4080 16GB GDDR6X, Windows 11 Home, Premium Support & Dell Migrate - Black

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