ASRock B450M Pro4 RAM Slots Guide 2026
The ASRock B450M Pro4 motherboard features 4 DDR4 RAM slots, supporting up to 128GB for robust 2026 builds. Ideal for AMD Ryzen users, these slots enable dual-channel performance boosts.
Slot 1: DIMM_A1 Primary
First slot for single-channel or dual-channel setups. Populate first for optimal boot.
Slot 2: DIMM_A2 Secondary
Pairs with A1 for dual-channel. Use matching kits for best speeds up to 4133MHz OC.
Slot 3: DIMM_B1 Expansion
Third slot for 3-stick configs, but dual-channel preferred. Check QVL for compatibility.
Slot 4: DIMM_B2 Final
Completes quad-channel illusion via dual dual-channel. Max 32GB per slot in 2026.
Configuration Tips
Always fill A2 and B2 first for dual-channel. Enable XMP in BIOS for rated speeds.
Supported Speeds 2026
Native DDR4-3200, OC to 3600+. Verify with Ryzen 5000/7000 series.
Upgrade Paths
Mixing kits risky; buy matched pairs. RGB sync via Polychrome.
Troubleshooting
No POST? Reseat modules, update BIOS to latest 2026 version.