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Compact black Mini PC, 7 by 7.25 by 1.5 inches, 3.1 lb

Lenovo

Lenovo ThinkStation Mini i9-14900 T400 16GB 2TB Win 11 Home

SKU CH-K813-0HPK0

Mini desktop with a 24-core i9-14900, 16 GB DDR5, 2 TB PCIe SSD and NVIDIA T400 graphics in a 7 × 7.25 × 1.5 in chassis

  • TypeBusiness & Home Office
  • Form FactorMini PC
  • Power Supply300W
  • MonitorMonitor not included
  • Operating SystemWindows 11 Home
  • L3 Cache Per CPU36MB Cache
  • 24 cores and 32 threads handle heavy workloads with the i9-14900 up to 5.8 GHz
  • NVIDIA T400 4 GB GDDR6 graphics drive professional visual tasks
  • 16 GB DDR5 memory and 2 TB PCIe NVMe SSD give fast data access
  • WiFi 6 and Bluetooth 5.3 plus RJ-45 keep connections stable
  • Compact 7 × 7.25 × 1.5 in mini PC fits tight spaces

Compact Workstation Build

The Lenovo ThinkStation Mini pairs a 14th Gen i9-14900 processor with an NVIDIA T400 4GB GDDR6 graphics card. It delivers 24 cores and 32 threads for multi-threaded applications. The system includes 16GB DDR5 memory and a 2TB PCIe NVMe SSD. It targets professionals who need high compute density in a 7 IN x 7.25 IN x 1.5 IN chassis.

Thermals and Power Profile

A 300W power supply feeds the CPU, discrete GPU, WiFi 6 and Bluetooth 5.3 radios. The small 3.1lb enclosure relies on integrated airflow paths rather than large coolers. In typical office workloads the fan curve stays low, keeping acoustic output modest. Power draw scales with the 2.00GHz base clock and 5.8GHz boost behaviour.

Sustained Load Behaviour

Under continuous multi-core load the 36MB cache helps maintain throughput across 8 performance cores. The T400 GPU handles parallel compute tasks without thermal throttling in the mini form factor. DDR5 bandwidth supports sustained memory-intensive workflows. The fixed 300W budget caps peak performance during extended rendering or simulation runs.

Highlights

  • 24 cores and 32 threads handle heavy workloads with the i9-14900 up to 5.8 GHz
  • NVIDIA T400 4 GB GDDR6 graphics drive professional visual tasks
  • 16 GB DDR5 memory and 2 TB PCIe NVMe SSD give fast data access
  • WiFi 6 and Bluetooth 5.3 plus RJ-45 keep connections stable
  • Compact 7 × 7.25 × 1.5 in mini PC fits tight spaces

Specifications

BrandLenovo
ModelThinkStation
TypeBusiness & Home Office
Form FactorMini PC
Power Supply300W
MonitorMonitor not included
Operating SystemWindows 11 Home
L3 Cache Per CPU36MB Cache
GPU/VGA TypeNVIDIA T400
Graphics InterfacePCI Express x16
Memory Capacity16GB DDR5
SSD2 TB
HDDNo
Optical Drive TypeNo Optical Drive
Screen SizeNo Screen
WLAN802.11ax
BluetoothBluetooth 5.3
Card ReaderNo
RJ45Yes
Keyboard TypeUSB Keyboard

Questions about this item

How do I install the NVIDIA T400 graphics card in the ThinkStation Mini, and which power connector is commonly missed?

The T400 draws power from the PCIe x16 slot itself; no extra power cable is needed. The step people miss is seating the card fully until the retention clip clicks, otherwise the 300 W PSU will not detect it.

What maintenance will the 16 GB DDR5 SO-DIMM and 2 TB PCIe SSD require over time?

DDR5 SO-DIMM and NVMe SSD have no moving parts and need no scheduled maintenance. Keep the Mini PC vents clear of dust so the 300 W PSU fan can cool the i9-14900 under load.

Which limit appears first when the i9-14900 runs at 5.8 GHz on all 24 cores inside the 1.5 in high chassis?

The 300 W power supply and compact thermal envelope throttle the CPU before the T400 4 GB GDDR6 or 16 GB DDR5 memory become bottlenecks.

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