RS4704S18 Rugged 4U Server

Field tested, failsafe and long life performance in extreme conditions. As processing performance continues to improve, Crystal Group is dedicated to minimize the SWaP envelope of the RS4704S18. High-end computing performance in a 4U chassis with a depth of 18″ (45.7cm) fits most any rack space.


  • Aluminum construction – 43 lbs.
  • Easily mounted – Delrin glides, fixed mount, or Jonathan® rails
  • Up to 192 GB of memory
  • Rugged 4U, rack mounted 18″ depth
  • 1200W 1+1 AC power supply
  • Versatility with up to twelve 2.5” SSD SATA or SAS drives
  • GPGPU ready
  • Expandable with four x16 and two x8 PCIe slots
  • Intel® Xeon® Scalable processors

Please contact us to receive the reports, guides and drawings that best fit your requirements.


Environmental Standards
MIL-STD-810, Operational Temperature, Method 501, Procedure I/II

-15°C to +55°C

MIL-STD-810, Storage, Method 501, Procedure I/II

-55°C to +85°C

MIL-STD-810, Humidity, Method 507, Procedure II

240 hours with humidity kit

MIL-STD-810, Altitude, Method 500

12,500ft operation, 40,000ft transport

MIL-STD-167-1 Vibration
MIL-S-901, Grade B
MIL-S-901, Grade A

With solid state drives + shock kits

Electromagnetic Compatibility Standards
FCC compliant
Form Factor
7.0" (17.78cm)
17.5" (44.45cm) EIA-310 Rack Compliant
18" (45.72cm)
43 lbs ( 19.5 kgs )
Intel® CPU architecture options from Intel embedded long-life roadmap; Intel® Xeon® Scalable processors
Expansion Slots
Four PCIe 3.0 x16, two x8
External Bays
Option 1

Up to 8x SAS

Option 2

Up to 12x SATA

Option 3

Up to 4x NVMe

16 GB

High speed, high volume fans (4) CPU temperature controlled

Jonathan rails or Crystal Glides
Power Supply
1200W 120/240VAC 50/60Hz w/PFC, 1+1 redundant, 115VAC 400Hz
System Board
Advantech ASMB-825
Software Compatibility
Accepts Windows 10®, VMware®, Linux® or Windows Server 2016®
Export Compliance
ECCN: 5A992.a; Classification is dependent on configuration and is subject to change. Please contact your Program Manager to receive the classification for your product.