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RAM Compatibility for Lenovo ThinkCentre M90a Gen 3 AIO
The Lenovo ThinkCentre M90a Gen 3 AIO is a 23.8″ AIO All-in-One desktop released in 2023. It uses DDR4-3200 SO-DIMM (not DDR5 ) memory with 2 DIMM slots, supporting a maximum of 64GB at 3200 MHz. All-in-One PCs combine the monitor and computer into a single unit, making RAM and SSD upgrades the most impactful performance improvements available.
Memory Specifications
| Specification | Details |
|---|---|
| Memory Type | DDR4-3200 SO-DIMM |
| Slots | 2 |
| Max Capacity | 64GB |
| Speed | 3200 MHz |
| Storage | 1x M.2 NVMe + up to 2x 2.5-inch drives |
Recommended RAM
Best Overall: Crucial DDR4-3200 SO-DIMM 32GB (2x16GB)
Reliable and fully compatible. Crucial’s Compatibility Guarantee ensures it works or your money back.
SSD Upgrade
The Lenovo ThinkCentre M90a Gen 3 AIO supports 1x M.2 NVMe + up to 2x 2.5-inch drives. Upgrading to a faster NVMe SSD is one of the best improvements you can make to an All-in-One PC.
Best SSD: Samsung 980 Pro 1TB NVMe
Outstanding performance with up to 7,000 MB/s sequential reads. Perfect for AIO systems.
Frequently Asked Questions
Can I upgrade the RAM in the Lenovo ThinkCentre M90a Gen 3 AIO?
Yes, the Lenovo ThinkCentre M90a Gen 3 AIO has 2 SO-DIMM slots accessible for upgrades, supporting up to 64GB of DDR4-3200.
Is it difficult to upgrade an All-in-One PC?
Most All-in-One PCs have a rear access panel for RAM and storage upgrades. You typically need a Phillips screwdriver and anti-static precautions. Lenovo models generally have good serviceability.
Upgrades that fit the Lenovo ThinkCentre M90a Gen 3 AIO
What fits: Memory: DDR4-3200 SO-DIMM, 2 user slots, up to 64GB · Storage: M.2 2280 NVMe PCIe 4.0; 2.5in SATA drive supported
Spec source: psref.lenovo.com (checked 26 Sep 2026).
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DDR4 SO-DIMM memory that fits
M.2 2280 NVMe SSDs that fit
2.5in SATA SSDs for the drive bay
Free download: The 2026 Laptop RAM Upgrade Compatibility Cheat Sheet
Find out in minutes whether your laptop’s RAM is upgradeable, exactly which DDR4/DDR5/LPCAMM2 stick fits, and how much is worth it. Enter your email and we’ll send the PDF instantly.
