A little history about this motherboard:

This motherboard is in great working condition. It was installed in a mITX case with excellent ventilation. A Ryzen 9 5900X was installed with a Thermalright FrostCommander 140 CPU cooler, and temperatures remained optimal. CL14 DDR4 3200 RAM was used at its XMP profile settings with zero issues. (Both CPU and RAM are being sold in my other listings) This motherboard was also tested with ECC DDR4 and works like a charm.

This board uses an Intel i225-V (V3) Ethernet network chip. Unlike previous problematic versions, it has no issues whatsoever and has passed every network test I could throw at it.

The CPU was set to use PBO, but no explicit overclocking was performed. The VRMs are in excellent condition.

All connectors and contacts are in great condition. All original accessories are included in the box.

The BIOS was updated to version 4001. (Version 4101 came out recently)

Key Asus Specs:

Model: ROG STRIX B550-I GAMING

CPU AMD AM4 Socket for AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop Processors Chipset AMD B550 Memory 2 x DIMM, Max. 64GB, DDR4 5100(O.C)/5000(O.C)/4800(O.C.)/4600(O.C)/4400(O.C)/4266(O.C.)/4133(O.C.)/4000(O.C.)/3800(O.C.)/3600(O.C.)/3466(O.C.)/3400(O.C.)/3200/3000/2933/2800/2666/2400/2133 MHz Un-buffered Memory * ECC Memory (ECC mode) support varies by CPU.

Graphic 1 x HDMI 2.1(4K@60HZ) * 1 x DisplayPort 1.4 * *Graphics specifications may vary between CPU types.

Expansion Slots AMD RyzenTM 4000 G-Series Processor AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors 1 x PCIe 4.0 x16 (x16 mode) 1 x PCIe 3.0 x16 (x16 mode)

Storage Total supports 2 x M.2 slot(s) and 4 x SATA 6Gb/s ports AMD RyzenTM 4000 G-Series Processors : AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors : AMD B550 Chipset : 1 x M.2_2 socket 3, with M Key, Type 2242/2260/2280 (PCIE 4.0 x4 and SATA modes) storage devices support 4 x SATA 6Gb/s port(s), 1 x M.2_1 socket 3, with M Key, Type 2242/2260/2280 (PCIE 3.0 x4 and SATA modes) storage devices support 1 x M.2_1 socket 3, with M Key, Type 2242/2260/2280 (PCIE 4.0 x4 and SATA modes) storage devices support Support Raid 0, 1, 10

LAN Intel® I225-V 2.5Gb Ethernet ASUS LANGuard Wireless Data Network 2x2 Wi-Fi 6 (802.11 a/b/g/n/ac/ax) support 1024QAM/OFDMA/MU-MIMO Intel® Wi-Fi 6 AX200 Supports dual-band frequency 2.4/5 GHz Supports channel bandwidth: HT20/HT40/HT80/HT160 Bluetooth Bluetooth v5.1* *BT 5.1 function will be ready in Windows 10 build 19041 or later.

Audio SupremeFX7.1 Surround Sound High Definition Audio CODEC S1220A

• Rear audio USB Type-C® port
• LED-illuminated design
• Audio Shielding
• Premium Japanese audio capacitors
• Supports up to 32-Bit/192kHz playback *
• Dual OP Amplifiers
• Impedance sense for front and rear headphone outputs
• Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
• High quality120dBSNR stereo playback outputand113dBSNR recording input Audio Feature :

USB Ports 4 x USB 3.2 Gen 2 port(s)(1 x USB Type-C® +3 x Type-A) 1 x USB 2.0 port(s)(1 x audio USB Type-C® ) Front USB Port ( Total 5 ) 1 x USB 3.2 Gen 2 front panel connector port(s)(1 x USB Type-C®) Rear USB Port ( Total 6 ) 1 x USB 2.0 port(s) 2 x USB 3.2 Gen 1 port(s) 2 x USB 2.0 port(s)

Back I/O Ports 4 x USB 3.2 Gen 2 (1 x USB Type-C®+3 x Type-A) 2 x USB 2.0 (one port can be switched to USB BIOS FlashBack™1 for audio USB Type-C®) 1 x BIOS FlashBack™ Button(s) 1 x Intel® I225-V 2.5Gb Ethernet 3 x LED-illuminated audio jacks 1 x ASUS Wi-Fi Module 1 x DisplayPort 1 x HDMI