MSI B450M A Pro Max upgrades
Released 2019 · on sale
micro-ATX (MS-7C52), no soldered RAM or storage - all memory, storage and CPU are socketed/replaceable. Heavy GPUs may need a support bracket per the manual; m-ATX 23.6 x 20.0 cm.
Upgrade guide → What fits, step by step, and official documents.
- 2x DDR4 DIMM (288-pin UDIMM, desktop): 2 × DDR4 DIMM · up to 64 GB total · 4133 MT/s
- 1x M.2 Key M (PCIe 3.0 / SATA) + 4x SATA 6Gb/s: SSD / HDD M.2 2242 / M.2 2280 / M.2 22110 (NVMe / SATA)
- Socket AM4 (PGA 1331) - replaceable CPU: AM4 · Ryzen 3000, Ryzen 5000, Ryzen 3000, Ryzen 5000
Slot map
2x DDR4 DIMM (288-pin UDIMM, desktop) 2 × DDR4 DIMM · up to 64 GB total · 4133 MT/s
Populate DIMMB1 first; dual-channel needs 2 modules. 32 GB modules / 64 GB total need BIOS with ComboPI 1.0.0.3+. 4133 MT/s only with Ryzen 3rd Gen R5/R7/R9 via A-XMP; other CPUs top out at 3466/3200. ECC UDIMMs physically fit but run in non-ECC mode, so no error correction. Keep DIMM voltage below 1.35 V.
| $/GB | Price | Capacity | Product | Condition | Store | Link |
|---|---|---|---|---|---|---|
| $2.75 | $21.99 | 8 GB | Micron 8GB DDR4-2400 UDIMM DDR4-2400 DIMM | Used | eBay US +2 | View deal Amazon Price alert |
| $4.81 | $77.00 | 2 × 8 GB | Corsair Vengeance LPX 16GB Kit (2 × 8GB) DDR4-3200 CL16 DDR4-3200 CL16 DIMM | Used | eBay US +2 | View deal Amazon Price alert |
| $5.00 | $160.00 | 2 × 16 GB | Corsair Vengeance LPX 32GB Kit (2 × 16GB) DDR4-3200 CL16 DDR4-3200 CL16 DIMM | Used | eBay US +2 | View deal Amazon Price alert |
| $5.78 | $185.00 | 2 × 16 GB | Corsair Vengeance LPX 32GB Kit (2 × 16GB) DDR4-3200 CL16 DDR4-3200 CL16 DIMM | New | eBay US +2 | View deal Amazon Price alert |
| $5.86 | $375.00 | 2 × 32 GB | Crucial 64GB Kit (2 × 32GB) DDR4‑3200 SO‑DIMM (260‑pin) DDR4-3200 CL22 DIMM | Used | eBay US +1 | View deal Amazon Price alert |
| $7.19 | $114.99 | 2 × 8 GB | Crucial 16GB Kit (2 x 8GB) DDR4-3200 CL22 UDIMM DDR4-3200 CL22 DIMM | New | eBay US +2 | View deal Amazon Price alert |
| $7.27 | $464.99 | 2 × 32 GB | Crucial 64GB Kit (2 × 32GB) DDR4‑3200 SO‑DIMM (260‑pin) DDR4-3200 CL22 DIMM | New | eBay US +1 | View deal Amazon Price alert |
| $7.81 | $500.00 | 2 × 32 GB | G.Skill Ripjaws V 64GB Kit (2 × 32GB) DDR4-3600 CL18 DDR4-3600 CL18 DIMM | New | eBay US +1 | View deal Amazon Price alert |
| $8.44 | $269.99 | 2 × 16 GB | Crucial 32GB Kit (2 × 16GB) DDR4-3200 UDIMM DDR4-3200 DIMM | New | eBay US +2 | View deal Amazon Price alert |
| $8.75 | $560.00 | 2 × 32 GB | Crucial Pro 64GB Kit (2 × 32GB) DDR4‑3200 UDIMM DDR4-3200 CL22 DIMM | New | eBay US +2 | View deal Amazon Price alert |
All compatible memory with filters → · Compare prices: DDR4 desktop RAM (DIMM)
1x M.2 Key M (PCIe 3.0 / SATA) + 4x SATA 6Gb/s SSD / HDD M.2 2242 / M.2 2280 / M.2 22110 (NVMe / SATA)
M.2 supports NVMe and SATA SSDs, lengths 2242/2280/22110 (22110 double-sided OK). With Ryzen CPUs the slot is PCIe 3.0 x4; with APUs it drops to x2 on Athlon/A-series parts. Installing an M.2 SATA drive likely disables one of the 4 SATA ports. No drive bays on the board - bays and thickness limits are case-dependent.
| $/TB | Price | Capacity | Product | Condition | Store | Link |
|---|---|---|---|---|---|---|
| $75.00 | $299.99 | 4 TB | Crucial P3 Plus 4TB M.2 2280 NVMe M.2 2280 SSD · NVMe Gen4 | Used | eBay US +2 | View deal Amazon Price alert |
| $97.56 | $49.95 | 512 GB | SC401 512GB M.2 2280 SATA SSD M.2 2280 SSD · SATA | Used | eBay US +2 | View deal Amazon Price alert |
| $97.64 | $49.99 | 512 GB | XG7 512GB M.2 2280 NVMe Gen4 SSD (Lenovo) M.2 2280 SSD · NVMe Gen4 | Used | eBay US +2 | View deal Amazon Price alert |
| $98.75 | $395.00 | 4 TB | Crucial P3 Plus 4TB M.2 2280 NVMe M.2 2280 SSD · NVMe Gen4 | New | eBay US +2 | View deal Amazon Price alert |
| $101.52 | $25.99 | 256 GB | Samsung PM981a 256GB M.2 2280 NVMe SSD (Lenovo FRU) M.2 2280 SSD · NVMe | Used | eBay US +2 | View deal Amazon Price alert |
| $105.00 | $209.99 | 2 TB | Crucial P3 Plus 2TB M.2 2280 NVMe M.2 2280 SSD · NVMe Gen4 | Used | eBay US +2 | View deal Amazon Price alert |
| $105.00 | $419.99 | 4 TB | Kingston FURY Renegade 4TB (no heatsink) M.2 2280 SSD · NVMe | Used | eBay US +1 | View deal Amazon Price alert |
| $107.40 | $54.99 | 512 GB | SC401 512GB M.2 2280 SATA SSD M.2 2280 SSD · SATA | Refurbished | eBay US | View deal Amazon Price alert |
| $107.40 | $54.99 | 512 GB | PM981A 512GB M.2 2280 NVMe SSD (Lenovo FRU 00UP735) M.2 2280 SSD · NVMe | Used | eBay US +2 | View deal Amazon Price alert |
| $109.99 | $109.99 | 1 TB | Crucial P3 1TB M.2 2280 NVMe (Gen3) M.2 2280 SSD · NVMe Gen3 | Used | eBay US +2 | View deal Amazon Price alert |
All compatible storage with filters → · Compare prices: NVMe M.2 2280 SSD
Socket AM4 (PGA 1331) - replaceable CPU AM4 · Ryzen 3000, Ryzen 5000, Ryzen 3000, Ryzen 5000
Supports 1st/2nd/3rd Gen Ryzen (Zen/Zen+/Zen 2), Ryzen APUs and older Athlon/A-series parts; Ryzen 5000 (Vermeer/Cezanne) works on MAX boards with a BIOS/AGESA update - verify MSI's CPU list. Ryzen 7000/9000 not supported. No official TDP cap, but the basic VRM makes 65 W the sensible ceiling; 105 W chips throttle under load.
| Price | Cores | Product | Condition | Store | Link |
|---|---|---|---|---|---|
| $124.99 | 6 cores / 12 threads | AMD Ryzen 5 5600G AM4 · 3.9–4.4 GHz · 65 W · iGPU · cooler included | Used | eBay US +2 | View deal Amazon Price alert |
| $127.29 | 6 cores / 12 threads | AMD Ryzen 5 5600X AM4 · 3.7–4.6 GHz · 65 W · cooler included | Used | eBay US +2 | View deal Amazon Price alert |
| $128.24 | 6 cores / 12 threads | AMD Ryzen 5 5600 AM4 · 3.5–4.4 GHz · 65 W · cooler included | Used | eBay US +2 | View deal Amazon Price alert |
| $132.98 | 6 cores / 12 threads | AMD Ryzen 5 5600G AM4 · 3.9–4.4 GHz · 65 W · iGPU · cooler included | New | eBay US +1 | View deal Amazon Price alert |
| $309.99 | 8 cores / 16 threads | AMD Ryzen 7 5800X3D AM4 · 3.4–4.5 GHz · 105 W | Used | eBay US +2 | View deal Amazon Price alert |
| $319.00 | 8 cores / 16 threads | AMD Ryzen 7 5800X3D AM4 · 3.4–4.5 GHz · 105 W | New | eBay US +2 | View deal Amazon Price alert |
| $319.80 | 8 cores / 16 threads | AMD Ryzen 7 5700X3D AM4 · 3.0–4.1 GHz · 105 W | Used | eBay US +2 | View deal Amazon Price alert |
| $359.89 | 8 cores / 16 threads | AMD Ryzen 7 5700X3D AM4 · 3.0–4.1 GHz · 105 W | New | eBay US +2 | View deal Amazon Price alert |
All compatible storage with filters → · Compare prices: AM4 processors