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Silver HP MT21 thin-client laptop, 14-inch HD non-touch display, closed clamshell

HP

HP Thin Client MT21 laptop, 14" HD, Celeron 3865U 1.80GHz, 8GB DDR4, 512GB NVMe, Win 10 Pro

SKU CH-9K22-MRRA9 MPN MT21

Thin-client notebook with a 14-inch HD display, dual-core Celeron 3865U at 1.80 GHz, 8 GB DDR4 memory, 512 GB NVMe storage and Windows 10 Pro

  • Screen size14.0 in (35.6 cm)
  • ProcessorIntel Celeron
  • Graphics processorIntel HD Graphics 610
  • Memory size8 GB
  • SSD storage512 GB
  • Display resolution1366 × 768
  • 14 inch HD display for clear visuals
  • Intel Celeron 3865U dual core processor runs at 1.80GHz
  • 8GB DDR4 2400 memory supports multitasking
  • 512GB NVMe SSD provides fast storage
  • Windows 10 Pro enables virtualised workloads

Thin Client for Virtual Desktops

The HP MT21 is a 14-inch thin client built for cloud and virtualised workloads. It runs Windows 10 Pro on a dual-core Intel Celeron 3865U at 1.80GHz with 8GB of DDR4 memory. The 512GB NVMe drive provides fast local storage for cached sessions and offline files. It suits task workers, kiosks and remote-access stations that rely on server-side compute.

Passive Cooling and Low Power

The low-power processor and integrated Intel HD Graphics 610 generate minimal heat, allowing quiet operation without noisy fans. Power draw stays modest during typical VDI sessions, web browsing and document work. The HD display at 1366 x 768 keeps GPU load light. This thermal profile supports continuous uptime in open-plan offices, reception desks or healthcare carts where silence matters.

Upgrade from Older Thin Clients

Replaces legacy thin clients limited to 4GB RAM, spinning drives or slower eMMC storage. The jump is worth it when users need snappier session launches, smoother multi-monitor support via HDMI, VGA and DisplayPort over USB-C, and room for local profiles. It is not for buyers who want discrete graphics, higher screen resolution, touch input or workloads that demand more than two CPU cores.

How it compares

Measured against everything we stock in Standard Laptops & Notebooks, at today’s prices. Recalculated every night.

Price $518.99
Cheaper than about 57% of the 32,549 comparable items (median $599.99).
Screen size 14.0 in (35.6 cm)
Lower than about 60% of the 32,085 comparable items (median 15.2 in).
Memory size 8 GB
Lower than about 80% of the 30,127 comparable items (median 16 GB).

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Specifications

Product
Brand nameHP
Product lineThin Client
Model nameMT21
Product colorSilver
Product typeMainstream
Processor
ProcessorIntel Celeron
CPU coresDual-core Processor
Memory
Memory size8 GB
RAM type and speedDDR4 2400
Memory configuration4 GB x 2
Total memory slots2
Free memory slots0
Maximum supported memory32 GB
Storage
SSD storage512 GB
Hard driveNo
Storage configuration512 GB NVMe SSD
Display
Screen size14.0 in (35.6 cm)
Display resolution1366 × 768
Touch inputNon-Touch Screen
Widescreen compatibleYes
Display formatHD
Graphics
Graphics processorIntel HD Graphics 610
Graphics typeIntegrated Card
Audio & video
SoundIntegrated Sound card
SpeakersIntegrated Stereo Speakers
Web cameraYes
Connectivity
LAN connection10/100/1000 Mbit/s
Wi-FiWi-Fi 5 (802.11ac)
Bluetooth support4.0
Ports & slots
USB ports2x USB 3.1 Gen 1, 1x USB-C 3.1 Gen 1
Video outputs1x HDMI, 1x VGA, 1x DisplayPort via USB-C
HDMI ports1 x HDMI
Audio jacks1 x Headphone/Microphone Combo Jack
Memory card reader3-in-1
Power
Battery runtime> 5 h
Power adapter45-watt AC Adapter
Battery pack3-cell Lithium Ion
Size & build
Overall dimensions9.4 in × 13.2 in × 0.8 in
Product weight3–3.9 lb (1.36–1.77 kg)
Software
Operating systemWindows 10 Pro
More details
Pointing deviceYes
KeyboardStandard
Keyboard backlightNon-backlit

Questions about this item

How do I install the 512GB NVMe drive and what step is often missed?

The drive is already fitted from the factory upgrade; the only step is to initialise the volume in Windows Disk Management before storing data.

What maintenance or replacement will the 8GB DDR4 memory need later?

The two 4GB modules are soldered and not user-replaceable, so no routine memory maintenance is possible.

Which limit appears first during sustained workloads on the Celeron 3865U?

The dual-core 1.80GHz processor with Intel HD Graphics 610 reaches thermal throttle before the 512GB NVMe or 8GB DDR4 become bottlenecks.

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