Lenovo ThinkCentre M75q Gen 2 Tiny upgrade guide

Updated Oct. 19, 2026 · Written from this device's verified specifications

The ThinkCentre M75q Gen 2 Tiny is a small desktop that upgrades more easily than it looks: both memory slots are socketed, storage covers one M.2 SSD plus one 2.5-inch drive, and the chassis opens without tools. The one thing you can't change is the processor — it's soldered. Here's what fits in each category, the limits worth knowing before you buy, and a safe way to fit the parts.

At a glance

  • RAM: 2 × DDR4 SO-DIMM sockets, up to 64 GB total, dual-channel
  • Storage: 1 × M.2 NVMe SSD (2242 or 2280) + 1 × 2.5-inch SATA bay
  • CPU: soldered — no upgrade path
  • Single-stick shipping configs: a matched second SO-DIMM unlocks dual-channel
  • No PCIe expansion slots
DDR4 SO-DIMM slots (2, dual-channel)2 × DDR4 SO-DIMM · up to 64 GB total · 3200 MT/s
M.2 2242/2280 NVMe SSD slot (1)SSD M.2 2242 / M.2 2280 (NVMe) · up to 1.024 TB
2.5-inch SATA drive bay (1)HDD / SSD 2.5" (SATA) · max 7 mm thick · up to 1.024 TB
2 × SO-DIMM · DDR4up to 64 GB totalM.2 2242/2280 NVMe SSD slot (1)SSD M.2 2242 / M.2 2280 (NVMe) · up to 1.024 TB2.5-inch SATA drive bay (1)HDD / SSD 2.5" (SATA) · max 7 mm thick · up to 1.024 TB
Schematic of the upgradeable slots (not to scale). Check the owner's manual for their exact positions.

Lifecycle and support

A current model: sold new and supported. Support is planned until July 31, 2031 (estimate).

202120222023202420252026202720282029203020312032Today11 · Release · Dec. 30, 202122 · EOSL · Nov. 29, 202933 · Extended support ends · July 31, 2031
Filled dots: dates published by the manufacturer. Hollow dots: estimates from third-party sources.
MilestoneDate
Release
First available to buy.		 Dec. 30, 2021 Official Earliest PSREF 'Announce Date' (config 11JN002PUS, US, Ryzen 5 PRO 5650GE). Later config announcements 2022-07-05 and 2022-11-29 are regional roll-outs, not the launch.
Source ↗
End of standard support (EOSL)
Standard warranty and support contracts can no longer be renewed.		 Nov. 29, 2029 Official PSREF 'End of Support', identical for all 11JN model variants listed.
Source ↗
End of extended support
Paid extended support ends; after this there is no manufacturer support at all.		 July 31, 2031 Estimate Lenovo Japan regional '保守活動終了予定日' (planned end of maintenance activity) for JP model 11JQS2S100; conflicts with the global PSREF date of 2029-11-29. No global extended-support date published.
Source ↗

Dates not listed haven't been published by the manufacturer or a reliable third party.

RAM (memory)

What fits: two DDR4 SO-DIMM sockets (DIMM1 and DIMM2), both socketed with nothing soldered down. Use unbuffered, non-ECC DDR4 SO-DIMMs — no ECC or registered memory support is documented. Lenovo validates up to 2 × 32 GB = 64 GB total, which is a figure based on testing with Lenovo's own modules rather than a hard chipset limit, so treat 64 GB as the safe ceiling. Installation is toolless.

Limits and what to watch out for: the rated maximum speed is DDR4-3200, but the actual clock is capped by your APU. Athlon and Ryzen 3000-series (Picasso) models run DDR4-2666 or 2933; Ryzen 4000 and 5000 models run 3200. Buying 3200 MT/s modules for a slower APU won't break anything — they'll just run at the lower speed. Also, most units ship with a single stick (1×8 GB or 1×16 GB), so if you only add capacity you may want to replace it with a matched pair. Dual-channel matters here because the Radeon graphics share that memory bandwidth.

Buying tip: match the size and speed of the stick already installed, or buy a matched 2 × kit if you're going to 32 GB or 64 GB.

Buying tips

  • DDR4 SO-DIMM only — not desktop DIMMs, not ECC/registered
  • Match speeds and capacities in pairs for dual-channel
  • Don't pay extra for 3200 MT/s if your APU is a Ryzen 3000/Athlon model

Storage (SSD and hard drive)

What fits: the M75q Gen 2 Tiny takes two internal drives used together — one M.2 NVMe SSD and one 2.5-inch SATA drive.

The M.2 slot accepts 2242 or 2280 length drives. The difference matters: a 2242 card runs at PCIe 3.0 x2 only, while a 2280 drive gets PCIe 3.0 x4 or PCIe 4.0 x4. There's no SATA support on this M.2 slot — SATA belongs to the 2.5-inch bay. Self-encrypting (Opal) drives are supported on 2280 drives, including Opal 2.0 on the 4.0 interface. Note that Lenovo's documents confirm PCIe 4.0 x4 across the family, but the Ryzen 3000 and 4000 APUs are PCIe 3.0 designs — realistically, full Gen 4 speeds need a Ryzen 5000 config. A Gen 4 drive still works in any unit; it just runs at Gen 3 speed on older APUs.

The 2.5-inch bay takes SATA 6 Gb/s HDDs (5.4K or 7.2K) or 2.5-inch SSDs. Drive height isn't stated in the available documentation; 7 mm is the practical limit in this chassis, so verify clearance before ordering a 9.5 mm drive. There's no RAID support and no extra internal bays beyond these two.

Limits and what to watch out for: Lenovo validates drives up to 1 TB in each location. That's a tested-with-Lenovo-offerings figure, not a controller limit — larger drives, such as 2 TB M.2 cards, generally work but are unvalidated. If you want more than two drives, you'll need external USB storage.

Buying tip: a 2280 NVMe SSD is the best fit for most owners. If your unit shipped with a 2242 drive, moving to 2280 is the cheapest way to both go faster and gain capacity.

Buying tips

  • M.2 2280 NVMe for the best speed; 2242 is limited to PCIe 3.0 x2
  • No SATA on the M.2 slot — SATA drives go in the 2.5-inch bay
  • 1 TB per drive is Lenovo's tested limit; 2 TB+ is unvalidated but usually works
  • Check 2.5-inch drive thickness (7 mm practical limit) before buying

How to upgrade

Before you start

  • Back up your data before opening the case.
  • Shut down fully and unplug the power cable.
  • Ground yourself (touch the metal chassis or use an anti-static strap) before handling components.
  • Open the case — the chassis opens without tools. Check the owner's manual for exact disassembly for your unit.
  • Install the memory, SSD or drive. RAM and storage installs are toolless.
  • Close the case and reconnect power.
  • Start the machine and check that the BIOS/firmware sees the new part.

Steps

  1. Back up
    Save anything you care about before you touch the hardware.
  2. Power down
    Shut the computer down and unplug the power cable and all peripherals.
  3. Ground yourself
    Discharge static by touching the metal chassis; an anti-static strap is even better.
  4. Open the case
    The Tiny chassis opens without tools. The Hardware Maintenance Manual shows the exact procedure and the location of the DIMM sockets, the M.2 SSD slot and the SATA connector.
  5. Install the part
    Seat the SO-DIMM or M.2 SSD and, if needed, mount the 2.5-inch drive. Memory installation is toolless.
  6. Close up and check
    Reassemble, plug in and start the machine. Confirm in the BIOS/firmware that the new memory or drive is detected before booting into the operating system.

Good to know

  • The 64 GB memory ceiling is based on Lenovo's testing with its own modules, not a hard chipset limit.
  • The 1 TB per-drive figure is Lenovo's validated maximum; larger drives work but are untested.
  • PCIe 4.0 x4 speeds effectively require a Ryzen 5000 configuration — this is inferred from the CPU generations, not stated explicitly by Lenovo.
  • The 2.5-inch bay's 7 mm drive thickness limit is a practical figure; it isn't confirmed in the available documentation.
  • Official Lenovo sources show machine-type prefix 11JN for this model; 11J4/11J5 labels disagree with Lenovo's own documents, so verify your model number on PSREF before buying parts.

Frequently asked questions

How much RAM can the ThinkCentre M75q Gen 2 Tiny take?

Up to 64 GB (2 × 32 GB DDR4 SO-DIMM). That ceiling is based on Lenovo's testing with its own modules rather than a hard chipset limit. Note that the speed actually used depends on the APU: Athlon and Ryzen 3000 models run DDR4-2666/2933, while Ryzen 4000/5000 models run 3200.

Can I upgrade the CPU in the M75q Gen 2 Tiny?

No. The APU is soldered to the board with no socket, so there is no processor upgrade path. Units shipped with Athlon Silver/Gold or Ryzen 3000GE/4000GE/5000GE PRO parts, all 35 W, and the chip you bought is the chip you keep.

Does it support PCIe 4.0 NVMe SSDs?

The M.2 2280 slot supports PCIe 4.0 x4, but realistic Gen 4 speeds require a Ryzen 5000 configuration — the Ryzen 3000 and 4000 APUs are PCIe 3.0 designs. Gen 4 drives work in any unit; on older APUs they simply run at Gen 3 speed. A 2242 card is limited to PCIe 3.0 x2.

How many drives can I install?

Two internal drives total: one M.2 NVMe SSD and one 2.5-inch SATA HDD or SSD, used together. There are no extra internal bays and no RAID support. The 2.5-inch drive should be around 7 mm thick, though that limit isn't confirmed in Lenovo's documents — verify before ordering a thicker drive.

Does the M75q Gen 2 Tiny support ECC memory?

No ECC or registered memory support is documented. Use plain unbuffered DDR4 SO-DIMMs.

Is my unit really a Gen 2?

Official Lenovo sources identify the Gen 2 by a model-type prefix of 11JN. If your unit is labeled 11J4/11J5, check its exact model number on PSREF before buying parts — some Gen 1 components differ.

Official documents and references

This guide was written with AI assistance from the compatibility data PartsPrices verified against the manufacturer's documents. Always check your exact model and the owner's manual before buying or opening your computer.