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Motherboard MB4C81X-0300 Series

Name: Motherboard MB4C81X-0300 Series
Brand: Qotom
SKU: MB4C81X-0300

Model: MB4C81X-0300

Total LAN8

LAN Speed10G RJ45 / 10G SFP+

Serial Ports1

Embedded hardware designs can start with MB4C81X-0300, featuring high-bandwidth Denverton motherboard with Dual DDR4 up to 64GB, 4 × 10G RJ45 and 4 × 10G SFP+, plus 2 × M.2 SSD, M.2 4G/5G and 4 × SATA 3.0. Deployment scenarios range from compact server platforms and specialized hardware designs.

Key Specs

CPU: Denverton
Memory: DDR4 SO-DIMM · Max 64GB
LAN: 8
Storage: M.2 Mkey, SATA
Board Size: 165x115

Compatible Systems

Q20300SE-S23

Q20300SE-1U19

Send Inquiry

MB4C81X-0331 MB4C81X-0332 MB4C81X-0342 MB4C81X-0351 MB4C81X-0352 Intel Denverton ATOM C3758 C3758R C3808 C3908 C3958

Main Features

Intel Denverton Processor
1 × VGA, 1 × RS-232 (RJ-45)
2 × USB 3.0
3 × M.2
4 × SATA 3.0
4 × 10G SFP(+) (1G SFP)
4, Intel X540 10G LAN

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Mini PC Q20300S9 S10 Series

Q20300S9-S10

Mini PC Q20300S9 1U11 Series

Q20300S9-1U11

Mini PC Q20300SE S23 Series

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Mini PC Q20300SE 1U19 Series

Q20300SE-1U19

Frequently Asked Questions

Q20300S9 BIOS Setup Prior to MikroTik RouterOS Installation
This step-by-step guide covers required BIOS configuration on Qotom Q20300S9 before installing MikroTik RouterOS. You need to disable VT-d under IntelRCSetup > North Bridge Chipset Configuration > SSA Config to avoid Ethernet detection failures, boot hangs and packet loss for stable router operation.

CPU	Intel Denverton Processor
Chipset	By CPU
Dimension	175 × 115mm
Core Number	By CPU
Max. Speed	By CPU
L2 Cache	By CPU
BIOS	UEFI

Technology	DDR4 2133MHz SDRAM
Max.	64GB
Socket	2 × SO-DIMMs

Interface	1000Mbps/10Gbps
Controller	2, Intel X540 10G LAN Both interfaces support up to 12Gbps
Connector	4 × RJ-45
Interface	1000Mbps/10Gbps
Controller	4, Intel X553 SFP(+) (10GbE/1GbE)
Connector	4 × SFP(+)

Power Button	1 × Power Button, 1 × Reset Button
LED	1 × Power LED, 1 × HDD LED

TPM	1 (Option)
VGA Header	1, 2 × 5Pin, Pitch 2.0mm
SATA	4, SATA 3.0 (6.0Gb/S)
SATA PWR Connector	4, 1 × 4Pin, Pitch PH2.0mm
SIM Card Slot	1
AutoStart Jumper	1
Clear CMOS Jumper	0
USB 2.0 Header	1, 1 × 4Pin, Pitch 2.0mm
Front Panel Header	1, 2 × 5Pin, Pitch 2.0mm
Power Header	1, 1 × 2Pin, Pitch 3.5mm, Phoenix 2Pin

Motherboard MB4C81X-0300 Series

Key Specs

Compatible Systems

Main Features

Processor System

Memory

Graphics

Ethernet

Audio

Front I/O

Rear I/O

Storage

Expansion

Internal Connector

Watchdog Timer

Power

Environmental

Accessories

OS Support

Package Contents

Order & Specification Selection

BIOS & Firmware

Driver Downloads

Related Products

Frequently Asked Questions

Q20300S9 BIOS Setup Prior to MikroTik RouterOS Installation

USB	1 × USB 3.0, 1 × USB
DC-IN	1
Serial Port	1 × RS-232 (RJ-45)
VGA	1
Ethernet	4 × 10G LAN
SFP+	4 × 10G SFP+

M.2	2 × M.2 for SSD (M key, Type: 2280, PCIe 3.0 × 2)
M.2	1 × M.2 for 4G/5G (B key, Type: 3042/3052),

Output	From Super I/O to Drag RESETCON#
Interval	256 Segments,0,1,2,3,,,255 sec/min

Ordering Code	Code Name	Processor Type	Processor Number	Cores / Threads	Frequency	Cache	Graphics	TDP
MB4C81X-0331	Denverton	Atom	C3758R	8 / 8	2.40Ghz	16M	-	26W
MB4C81X-332	Denverton	Atom	C3758	8 / 8	2.2Ghz	16M	-	25W
MB4C81X-342	Denverton	Atom	C3808	12 / 12	2.0Ghz	12M	-	25W
MB4C81X-351	Denverton	Atom	C3958	16 / 16	2.0Ghz	16M	-	31W
MB4C81X-352	Denverton	Atom	C3908	16 / 16	2.0Ghz	16M	-	31W