ASRock B550 Phantom Gaming-ITX/ax vs ASRock B550M Pro4
Key differences
- ASRock B550 Phantom Gaming-ITX/ax: ethernet 2.5 Gbps vs 1 Gbps (60% higher)
- ASRock B550M Pro4: max memory 128 GB vs 64 GB (50% higher)
- ASRock B550M Pro4: memory slots 4 vs 2 (50% higher)
Same on both: power stages (vrm) 8, usb4 No, pcie 5.0 m.2 slots 0, socket AM4, chipset B550, m.2 slots 2, rear usb-c 1, memory type DDR4, gpu slot PCIe 4.0, bios flashback No, max memory speed 4,733 MT/s.
| ASRock B550 Phantom Gaming-ITX/ax | ASRock B550M Pro4 | |
|---|---|---|
| Released | 2020 | 2020 |
| Power stages (VRM) | 8 | 8 |
| USB4 | No | No |
| Wi-Fi | Wi-Fi 6 | — |
| PCIe 5.0 M.2 slots | 0 | 0 |
| Socket | AM4 | AM4 |
| Chipset | B550 | B550 |
| Ethernet | 2.5 Gbps | 1 Gbps |
| M.2 slots | 2 | 2 |
| Rear USB | 1× 10Gb/s Type-C, 1× 10Gb/s Type-A, 4× 5Gb/s Type-A | 1× 10Gb/s Type-C, 1× 10Gb/s Type-A, 4× 5Gb/s Type-A, 2× USB 2.0 |
| M.2 slots (detail) | 1× PCIe 4.0 x4, 1× PCIe 3.0 x4 | 1× PCIe 4.0 x4, 1× PCIe 3.0 x2 |
| Rear USB-A | 5 | 7 |
| Rear USB-C | 1 | 1 |
| Bluetooth | 5.2 | — |
| PCIe slots | 1× PCIe 4.0 x16 | 1× PCIe 4.0 x16, 1× PCIe 3.0 x4 (x16 slot), 1× PCIe 3.0 x1 |
| SATA ports | 4 | 6 |
| Audio | Realtek ALC1220 | Realtek ALC1200 |
| Fan headers | 3 | 6 |
| Form factor | Mini-ITX | Micro-ATX |
| Memory type | DDR4 | DDR4 |
| GPU slot | PCIe 4.0 | PCIe 4.0 |
| RGB headers | 1× ARGB, 1× RGB | 2× ARGB, 2× RGB |
| Internal USB headers | 1× USB-C 10Gb/s, 1× USB 5Gb/s (2 ports), 1× USB 2.0 (2 ports) | 2× USB 5Gb/s (4 ports), 2× USB 2.0 (4 ports) |
| Max memory | 64 GB | 128 GB |
| Memory slots | 2 | 4 |
| Thunderbolt / USB4 | — | — |
| BIOS flashback | No | No |
| Ethernet controller | Intel I225-V 2.5Gb | Realtek RTL8111H 1Gb |
| Video outputs | 1× HDMI 2.1, 1× DisplayPort 1.4 | 1× HDMI 2.1, 1× DisplayPort 1.4, 1× D-Sub |
| Front USB-C header | 10Gb/s | — |
| Max memory speed | 4,733 MT/s | 4,733 MT/s |