ASRock B850I Lightning WiFi Phantom Gaming AM5 Mini-ITX
ASRock
ASRock B850I Lightning WiFi Phantom Gaming AM5 Mini-ITX
The ASRock B850I Lightning WiFi is a Mini-ITX gaming motherboard for AM5 Ryzen processors, built for enthusiasts who want robust overclocking support and high-speed connectivity in a compact form factor. It combines power delivery tuned for CPU overclocking with WiFi 6E and 2.5G LAN networking.
Why this product
110A power delivery for CPU overclocking
The 10+1+1 phase design with Dr.MOS SPS technology and Hi-Density Power Connectors delivers stable, smooth current to the CPU during extreme overclocking without thermal compromise.
PCIe Gen5 and Gen4 NVMe support
One Blazing M.2 socket runs at Gen5 (128 Gb/s) for maximum storage speed, paired with a Gen4 Hyper M.2 socket and two SATA ports for flexibility.
WiFi 6E and 2.5G LAN
Built-in WiFi 6E spans all three bands (2.4/5/6 GHz) with lower latency, and the Killer 2.5G LAN offers up to 2.5X standard gigabit throughput for gaming and file transfers.
8-layer PCB for memory overclocking
The thick PCB layout stabilises signal traces during DDR5 memory overclocking, supporting profiles up to 8200+ MT/s with AMD EXPO and Intel XMP 3.0.
Compact Mini-ITX design
At 17×17 cm, it fits tight builds without sacrificing connectivity or power delivery headroom.
- SocketAM5
- Form FactorMini-ITX (17 × 17 cm)
- Memory2 × DDR5 DIMM, up to 128GB, up to 8200+ MT/s (OC)
- M.2 Sockets2 (Gen5 + Gen4)
- WirelessWiFi 6E, Bluetooth 5.2
- NetworkingKiller 2.5G LAN
- Power Design10+1+1 Phase, 110A SPS
- SKUASR-1856
- EAN4711581490130
- Supports AMD Ryzen 9000, 8000 and 7000 series processors in Socket AM5.
- Accepts two DDR5 DIMMs in dual-channel mode, up to 128GB total, with AM5 standard speeds and EXPO/XMP 3.0 overclocking profiles.
- One PCIe 5.0 x16 slot for graphics or high-speed add-on cards.
- The single x16 PCIe slot runs at x16 when populated; there is no second slot for dual-GPU or multi-expansion setups.
- Does not support DDR4 memory—this board is DDR5 only.
Best for
- PC enthusiasts building compact AM5 systems with overclocking ambitions.
- Gamers in tight spaces who want low-latency networking and WiFi 6E.
- Content creators needing fast M.2 NVMe and 2.5G LAN for file transfers and streaming.
- Builders aiming to maximize DDR5 and CPU performance with tuned power delivery.
Trade-offs
- Multi-GPU or multi-card users — the single x16 PCIe slot provides no expansion flexibility.
- Large form-factor builds — Mini-ITX constraints limit cooling options and cable routing.
- DDR4-only systems — this board requires DDR5 memory and does not backward-support DDR4.
- Budget builds — overclocking-grade power delivery and WiFi 6E add cost compared to non-overclocking B850 models.
Phantom Gaming is designed by gamers and for gamers! Underneath its relentless appearance lie plentiful gaming oriented features and excellent gaming capabilities. It's all about bringing a new gaming experience to gamers!
Lightning series stands as a symbol of both speed and power. The design employs linear and angular elements, evoking the imagery of lightning – a spectacle of raw energy and breathtaking speed.
Featuring sturdy components and completely smooth power delivery to the CPU. Plus, it offers unmatched overclocking capabilities and enhanced performance with the lowest temperature for advanced gamers as well.
Dr.MOS design features the latest SPS (Smart Power Stage) technology. It's optimized for monitoring current and temperature of each phase, thus delivering smoother and neater power to the CPU with enhanced performance and OC capability.
CPU overclocking requires higher current. ASRock Hi-Density Power Connectors are designed to withstand higher currents compared to traditional CPU and ATX power connectors, providing a more stable system and reducing the risk of fire during heavy overclocking.
The 8 Layer PCB provides stable signal traces and power shapes delivering lower temperature and higher energy efficiency for memory overclocking! Thus, it's able to support the latest memory modules with most extreme memory performance! Derived from the "built for stable and reliable" designing concept, ASRock does not compromise on any details.
This motherboard is built with high quality materials, enthusiasts are able to enjoy the boost of DDR5 memory overclocking performance by enabling the pre-tested profiles. Make sure the memory modules are Intel® XMP/AMD EXPO™ capable and overclocking can be made so affordable, satisfying and absolutely no sweat at all.
ASRock Phantom Gaming Tuning Fan-Tastic Tuning function enables users to auto-detect the minimum duty of each fan with a single click. Users can also easily adjust the fan curve via the visualized UI interface, meeting their system's cooling performance and noise reduction requirements.
WiFi 6E technology has extended to the whole new 6GHz spectrum band, providing more WiFi capability and giving an even better and faster internet traffic. In addition to deliver higher speeds, the WiFi 6E also enhances the lower latency and supports service levels that are equivalent to 5G networks.
The intelligent Phantom Gaming 2.5Gb/s LAN platform is built for maximum networking performance for the demanding requirements of home networking, content creators, online gamers and high-quality streaming media. Boost networking performance up to 2.5X the bandwidth compared to the standard gigabit Ethernet, you'll enjoy the faster and uncompromised connectivity experience for gaming, file transfers and backups. Automatically detects and accelerates game traffic ahead of other network traffic for smoother, stutter-free in-game performance and the competitive edge.
General
| Brand | ASRock |
|---|---|
| Chipset | AMD B850 |
| Form Factor | Mini-ITX |
Performance
| CPU Support | AMD Socket AM5 Ryzen 9000, 8000 and 7000 Series |
|---|---|
| Power Design | 10+1+1 Phase Power Design, 110A SPS for VCore |
| Memory Standard | DDR5 Dual Channel |
| Memory Capacity | up to 128GB |
| Memory Speed | up to 8200+ MT/s (OC) |
| Memory Profiles | AMD EXPO, Intel XMP 3.0 |
| PCB Layers | 8 Layer |
Networking
| LAN Standard | Killer E3100G 2.5 Gb/s |
|---|---|
| WiFi Standard | WiFi 6E (802.11ax) |
| WiFi Bands | 2.4 GHz, 5 GHz, 6 GHz |
| Bluetooth | 5.2 |
Ports & power
| PCIe Slots | 1 × PCIe 5.0 x16 |
|---|---|
| M.2 Socket 1 | Type 2280, PCIe Gen5x4 (128 Gb/s) |
| M.2 Socket 2 | Type 2280, PCIe Gen4x4 (64 Gb/s) |
| SATA Ports | 2 × SATA3 6.0 Gb/s |
| USB 3.2 Gen2 (Rear) | 1 × Type-C, 2 × Type-A |
| USB 3.2 Gen1 (Rear) | 1 × Type-A |
| USB 3.2 Gen1 (Front Headers) | 1 × Type-C, 2 × Type-A |
| USB 2.0 | 4 × Rear, 2 × Front |
| Graphics Output | 1 × HDMI 2.1, 1 × USB Type-C (DP-Alt, DP1.4a) |
Storage & RAID
| SATA RAID | RAID 0, RAID 1 |
|---|---|
| NVMe RAID | RAID 0, RAID 1, RAID 10 |
Audio & Software
| Audio Codec | Realtek ALC1220 7.1 CH HD |
|---|---|
| Audio Enhancement | Nahimic Audio |
| BIOS | ASRock Full HD UEFI |
| Overclocking Utility | Phantom Gaming Tuning |
Physical
| Dimensions | 17 × 17 cm (Mini-ITX) |
|---|---|
| Accessories | 2 × SATA Data Cables, 2 × WiFi 6E Antennas, 2 × M.2 Mounting Screws, 1 × Thermistor Cable |
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.