Lenovo ThinkCentre M90a

23.8-inch business all-in-one on the Intel Q470 chipset, spanning 10th-gen Celeron/Pentium through Core i9-10900, up to 64 GB DDR4, an optional discrete AMD Radeon 625 GPU, two 2.5" bays plus an M.2 SSD slot, and a choice of UltraFlex IV or full-function tilt/swivel stand.

Memory

Slots: Two DDR4 DIMM slots, dual-channel capable
Type: DDR4-2666 or DDR4-2933
Max: 64 GB DDR4-2933, based on Lenovo's tested memory

Storage

Support: Up to three drives: 2 × 2.5" HDD + 1 × M.2 SSD; 2.5" HDD up to 2 TB each, M.2 SSD up to 1 TB; optional Intel Optane Memory, M.2
Bays: 2 × 2.5" SATA 6 Gb/s bays (5.4K/7.2K rpm HDD; 2nd bay occupies the ODD position)
M.2: M.2 2242 PCIe 3.0 x2 SSD or M.2 2280 PCIe 3.0 x4 NVMe SSD (plain or Opal)
RAID: RAID 0/1 support for HDDs
Optical: Slim 9.0 mm DVD-ROM or DVD±RW, or none
Card reader: Optional 3-in-1 card reader

Graphics

Integrated: Intel UHD Graphics 610 or 630 (by processor)
Discrete: Optional AMD Radeon 625, 2 GB GDDR5
Outputs: 1 × DisplayPort 1.2
Max resolution: 4096×2304 @ 60 Hz (DP)
Monitors: Up to 2 independent displays: native panel + 1 external via DisplayPort

Expansion

M.2: Two M.2 slots: one for WLAN, one for the SSD

Networking

Onboard: Gigabit Ethernet, Intel Ethernet Connection I219-LM, 1 × RJ-45, Wake-on-LAN
WLAN: Optional Realtek RTL8822CE (Wi-Fi 5 2×2 + BT5.0), Intel Wireless-AC 9560 (Wi-Fi 5 2×2 + BT5.1) or Intel Wi-Fi 6 AX201 (2×2 + BT5.1, vPro), M.2 card

Power

Adapter: 150 W or 170 W external adapter, 89% efficiency, autosensing

Ports

Rear: 4 × USB 3.2 Gen 1 (one supports Smart Power On), 1 × DisplayPort, 1 × Ethernet (RJ-45)
Rear optional: 1 × serial
Right: 1 × USB-C 3.2 Gen 1 (5V/3A charging), 2 × USB 3.2 Gen 2, 1 × headphone / microphone combo jack (3.5 mm)
Right optional: 1 × card reader

Display

Panel: 23.8" FHD (1920×1080) IPS, anti-glare, 72% NTSC, 1000:1 contrast, 16:9, ±89° viewing angles; 250 nits standard or 350 nits with PrivacyGuard
Touch: Optional 10-point Advanced In-cell Touch (AIT), or non-touch
Features: Borderless design, low blue light mode; optional PrivacyGuard privacy filter

Physical

Form factor: AIO, 23.8"
Dimensions (W×D×H): UltraFlex IV stand: 541 × 312.8 × 227.4 mm flat, up to 541 × 232.7 × 467.7 mm vertical; full function monitor stand: 541 × 200 × 414.2–494.2 mm; without stand: 541 × 46–61.3 × 340.5 mm
Weight: Without stand: 5.25–6.45 kg; with full function stand: 7.51–8.39 kg; with UltraFlex IV stand: 8.26–8.58 kg (by ODD/PrivacyGuard, PSREF)
Colour: Black
Bays: 2 × 2.5" disk bay (2nd occupies ODD bay), 1 × slim ODD bay
Stand: UltraFlex IV stand (-5° to +70° tilt, up to 164 mm lift flat / 115 mm vertical) or full function monitor stand (-5° to +30° tilt, up to 80 mm lift), or no stand
Mounting: Supports VESA mount 100 mm
Security: Discrete TPM 2.0 (TCG certified); Kensington Security Slot, 3 × 7 mm; optional chassis intrusion switch
Audio: High Definition Audio, Realtek ALC233 codec; stereo speakers 3 W × 2; dual-microphone array
Camera: Optional FHD 1080p (+ IR for Windows Hello) or FHD 1080p only, with ThinkShutter physical shutter
Buttons: Microphone mute, power, and PrivacyGuard on/off (PrivacyGuard models)

Management

Remote: Intel vPro with Intel AMT (selected configurations) or Non-vPro
BIOS security: Administrator, power-on and hard disk passwords; boot sequence control; boot without keyboard/mouse; self-healing BIOS; Smart USB protection; individual USB port disable
Status: End of support 2027-01-04 (PSREF)

Operating systems

Preloads: Windows 11 Pro, Windows 11 Home (+ Single Language), Windows 11 DG Windows 10 Pro 64, Windows 10 Pro 64, Windows 10 Home 64 (+ Single Language), Windows 10 IoT Enterprise, Ubuntu Linux, no operating system

Processors

Intel Celeron G5900
Intel Celeron G5905
Intel Celeron G5920
Intel Celeron G5925
Intel Pentium Gold G6400
Intel Pentium Gold G6500
Intel Pentium Gold G6600
Intel Core i3-10100
Intel Core i3-10300
Intel Core i3-10320
Intel Core i5-10400
Intel Core i5-10500
Intel Core i5-10600
Intel Core i7-10700
Intel Core i9-10900