How many M.2 slots does this motherboard have, and what PCIe speeds do they support?

It has 4 M.2 slots, and they support PCIe 5.0 x4 and PCIe 4.0 x4.

Does this motherboard support AMD Ryzen 9000, 8000, and 7000 series processors on the AM5 socket?

Yes. It uses the AMD AM5 socket and supports AMD Ryzen 9000 Series, Ryzen 8000 Series, and Ryzen 7000 Series processors.

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GIGABYTE B850 AORUS STEALTH AMD AM5 Motherboard, ATX, DDR5, 4x M.2, PCIe 5.0, USB-C, WIFI7, 5GbE LAN

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X3D Turbo Mode : Unleash new era gaming performance
DDR5 OC up to 8200MT/s
DriverBIOS : Wi-Fi Driver Pre-install, Power-On & EZ to Launch the Network.
AMD Socket AM5 : Supports AMD Ryzen 9000 / 8000 / 7000 Series Processors
Digital twin 14+2+2 phases VRM solution
Dual Channel DDR5 : 4*DIMMs with AMD EXPOMemory Module Support
M.2 EZ-Flex : high-efficiency heat dissipation & flexible baseplate for M.2 SSD
(Exclusive Patented Design)
WIFI EZ-Plug : Quick and easy design for Wi-Fi antenna installation
EZ-Latch Plus : PCIe and M.2 slots with Quick Release & Screwless Design
EZ-Latch Click : M.2 heatsinks with screwless design
Friendly UI : Multi-Theme, AIO Fan Control, and Q-Flash Auto Scan in BIOS and SW
Ultra-Fast Storage : 4*M.2 slots, including PCIe 5.0 x4
Efficient Thermal : VRM Thermal Armor Advanced & M.2 Thermal Guard L & M.2 Thermal Guard Ext.
Fast Networking : 5GbE LAN & Wi-Fi 7 with directional Ultra-high gain antenna
Extended Connectivity : HDMI
PCIe UD Slot : PCIe 5.0 x16 slots with 10X strength for graphics card & Better Heat dissipation effect
UD Base Plate : Experience the protection and heat dissipation with the UD Base Plate.

🔥Don't forget your OS, we have Windows 11 OEM, Download and USB versions available

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Overview

Specs

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Model
Brand	GIGABYTE
Series	AORUS
Model	B850 AORUS STEALTH

Supported CPU
CPU Socket Type	AM5
CPU Type	Ryzen 9000 Series, Ryzen 8000 Series, Ryzen 7000 Series

Chipsets
Chipset	AMD B850

Memory
Number of Memory Slots	4x288pin (DDR5)
Memory Standard	Support for DDR5 8200(O.C) / 8000(O.C) / 7950(O.C) / 7900(O.C) / 7800(O.C) / 7600(O.C.) / 7400(O.C.) / 7200(O.C.) / 7000(O.C.) / 6800(O.C.) / 6600(O.C.) / 6400(O.C) / 6200(O.C) / 6000(O.C) / 5800(O.C) / 5600(O.C) / 5200 / 4800 / 4400 MT/s memory modules.
Maximum Memory Supported	256GB
Channel Supported	Dual Channel
Memory Performance Profile	AMD EXPO / Intel XMP
ECC Supported	Non-ECC
Buffer Supported	Un-buffered

Expansion Slots
PCI Express 5.0 x16	1 x PCI Express x16 slot (PCIEX16), integrated in the CPU: AMD Ryzen 9000/7000 Series Processors support PCIe 5.0 x16 mode AMD Ryzen 8000 Series-Phoenix 1 Processors support PCIe 4.0 x8 mode AMD Ryzen 8000 Series-Phoenix 2 Processors support PCIe 4.0 x4 mode The PCIEX16 slot can only support a graphics card or an NVMe SSD. If only one graphics card is to be installed, be sure to install it in the PCIEX16 slot. Chipset: 1 x PCI Express x16 slot, supporting PCIe 4.0 and running at x4 (PCIEX4) The PCIEX4 slot shares bandwidth with the M2D_SB connector. The PCIEX4 slot becomes unavailable when a device is installed in the M2D_SB connector.

Storage Devices
Serial ATA (SATA)	2 x SATA 6Gb/s
M.2	4 x M.2 (Support PCIe 5.0 x4 & PCIe 4.0 x4)
SATA RAID	RAID 0, RAID 1, RAID 5, and RAID 10 support for NVMe SSD storage devices RAID 5 is only available on AMD Ryzen 9000 Series Processors. RAID 0 and RAID 1 support for SATA storage devices

Onboard Audio
Audio Chipset	Realtek ALC1220
Audio Channels	2/4/5.1/7.1-channel You can change the functionality of an audio jack using the audio software. To configure 7.1-channel audio, access the audio software for audio settings.

Onboard LAN
LAN Chipset	Realtek 5GbE
Max LAN Speed	5Gbps
Wireless LAN	Realtek Wi-Fi 7 RTL8922AE WIFI a, b, g, n, ac, ax, supporting 2.4/5/6 GHz carrier frequency bands
Bluetooth	Bluetooth 5.4

Rear Panel Ports
Back I/O Ports	1 x HDMI port (Note) 2 x antenna connectors (2T2R) 1 x USB Type-C header, with USB 3.2 Gen 2 support 2 x USB 3.2 Gen 2 Type-A ports (red) 4 x USB 3.2 Gen 1 ports 4 x USB 2.0/1.1 ports 1 x RJ-45 port 1 x optical S/PDIF Out connector 2 x audio jacks (Note) Actual support may vary by CPU.
HDMI	1 x HDMI
Audio Ports	2 Ports

Internal I/O Connectors
Onboard USB	1 x USB Type-C® header, with USB 3.2 Gen 2x2 + 1 x USB 3.2 Gen 1 header + 2 x USB 2.0/1.1 headers
Other Connectors	1 x 24-pin ATX main power connector 1 x 8-pin ATX 12V power connector 1 x 4-pin ATX 12V power connector 1 x CPU fan header 1 x CPU fan/water cooling pump header 4 x system fan headers 2 x system fan/water cooling pump headers 3 x addressable RGB Gen2 LED strip headers 1 x RGB LED strip header 4 x M.2 Socket 3 connectors 1 x front panel header 1 x front panel audio header 1 x noise detection header 1 x Trusted Platform Module header (For the GC-TPM2.0 SPI V2 module only) 1 x Q-Flash Plus button 1 x power button 1 x reset button 1 x reset jumper 2 x temperature sensor headers 1 x Clear CMOS jumper

Physical Spec
Form Factor	ATX
LED Lighting	RGB
Dimensions (W x L)	30.5cm x 24.4cm

Software Feature
BIOS Feature	1 x 512 Mbit flash Use of licensed AMI UEFI BIOS PnP 1.0a, DMI 2.7, WfM 2.0, SM BIOS 2.7, ACPI 5.0
Windows 11	Supported

Additional Information
First Listed on Newegg	August 07, 2026

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Item#: N82E16813145607R