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Grey compact cube mini PC with vented sides

Rmatamini

Rmatamini P99S barebone mini PC Xeon E5-2696v3 18-core 32GB DDR4 256GB SSD

SKU CH-53ZD-VR79A

A compact 5.6 L mini PC with an 18-core Xeon processor, 32 GB DDR4 memory, 256 GB SSD and RX 5500 8G graphics for gaming and multitasking

  • Processore5
  • Wi-Fi standardWi-Fi 5
  • Processor socket2696V3
  • Processor cores16-Core (6P+8E+2LP)
  • FSB1600 MHz
  • Installed memory16 GB
  • Ready-to-play dual OS with Windows 11 and SteamOS pre-installed
  • 18-core Xeon E5-2696v3 delivers server-grade multi-threaded performance
  • RX 5500 8G discrete GPU provides dedicated gaming graphics power
  • 32GB DDR4 dual-channel memory enables fast multitasking and game loading
  • Compact 5.6L chassis fits high-end components in minimal desk space

Compact gaming mini PC

The Rmatamini P99S is a 5.6-litre barebone desktop that arrives with Windows 11 and SteamOS pre-installed for immediate play. It targets gamers and streamers who want a small-form-factor system ready to run titles without extra setup.

Thermals and power

A custom X99 motherboard and upgraded power supply cool the Xeon E5-2696v3 18-core processor and the RX 5500 8G discrete GPU in a 7.87-inch cube. The design keeps noise low during typical gaming sessions while drawing power through the modified internal cooling solution.

Deciding specification

The system ships with 32 GB of DDR3 memory running at 1600 MHz, not DDR4, so buyers needing DDR4 compatibility must look elsewhere. Storage is a 256 GB SSD on a PCIe x4 interface, and wireless uses Wi-Fi 5 with Bluetooth 5.2.

How it compares

Measured against everything we stock in Mini PC Barebone Systems, at today’s prices. Recalculated every night.

Price $356.99
Cheaper than about 76% of the 1,735 comparable items (median $564.99).

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Specifications

Product
Brand nameRMATAMINI
Model nameP99S
Product colorGray
Processor
Processore5
Processor socket2696V3
Processor cores16-Core (6P+8E+2LP)
Memory
Installed memory16 GB
Supported memoryDDR4 2133
Dual-channel supportYes
Storage
Installed storage256 GB SSD
Audio & video
Channel count2 Channel
Connectivity
Wi-Fi standard802.11ac
Bluetooth support5.2
More details
FSB1600 MHz

Questions about this item

How do I install the X99 custom motherboard into the 5.6 L chassis and which step is often missed?

Mount the board on the supplied standoffs, connect the upgraded PSU cables and the discrete GPU power lead, then seat the GPU in the PCIe x4 slot; the step most people miss is plugging the GPU auxiliary power connector before closing the case.

What maintenance will the RX 5500 8G graphics card need later?

Clean the upgraded graphics-card radiator and fan every 6-12 months; the 8 GB video memory is soldered so only the cooler and fan are serviceable.

What limit appears first when the Xeon E5-2696v3 runs sustained loads in this 5.6 L enclosure?

Thermal headroom is the first bottleneck; the compact volume and custom X99 motherboard restrict airflow, so CPU clocks will throttle before power or memory bandwidth become limiting factors.

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