RS121S16 Rugged 1U Server

Field tested, fail-safe and long-life performance in extreme conditions. As processing performance continues to improve, Crystal Group is dedicated to minimize the SWaP envelope of the RS121S16. High-end computing performance in a 1U chassis with a depth of 16” (40 cm) fits most any rack space. Crystal Group Rugged Servers provide high-performance computing and high-capacity data storage in a rugged, all-aluminum package able to withstand the roughest terrains and toughest applications. Crystal Group’s highly customizable Rugged Servers are used by the U.S. Armed Forces, Foreign Military, Power Distribution, Autonomous Vehicles, Oil & Gas industry, and others for everything from communications and networking to weapons control, sensor and surveillance, and unmanned aircraft systems.


RS121S16 Rugged 1U Server

  • Light weight aluminum construction – 7 to 15 lbs.
  • Full processor performance to +55°C
  • Rugged 1U, rack mounted 16” depth
  • Versatility with two or three removable 2.5″ sleds
  • Expandable with PCIe x8 slot
  • Intel® Xeon® D series processors


Environmental Standards
MIL-STD-810, Operational Temperature, Method 501/502 Procedure I/II

-30°C to +50°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

12,500ft operation, 40,000ft transport

2 GRMS, 5-2000Hz, 60 min/axis with solid state drives

20g, 11msec–functional shock; 40g, 11msec crash hazard shock

Electromagnetic Compatibility Standards
AC, FCC Compliant
AC, RE102, CE102 compliant
Form Factor
1.75" (4.45cm)
16.5" (41.91cm)
16" (40.64cm)
7 - 15 lbs ( 3.18 - 6.8 kgs )
Intel® CPU architecture options from Intel embedded long-life roadmap; Intel® Xeon® D-1500 series processors
Expansion Slots
Two full height half-length PCIe x8 slots
External Bays
Option 1

Up to three removable SATA SSDs or HDDs, 7mm height

Option 2

Up to two removable SAS SSDs or HDDs, up to 15mm height

Option 3

1x M.2 SATA/PCIe 3.0×4, non-removable (can exist with any other option)

Option 4

Optical drive

Up to - 128 GB DDR4

Thermally controlled high-volume fans

Option 1

Mounted on Crystal glide rails

Option 2

Fixed mount, front and rear

Power Supply
460W 120/240VAC 50/60Hz w/PFC, 115VAC 400Hz
System Board
Xeon D-1587, up to 128GB DDR4 DIMM, 6x SATA 3, 2x 10GBE, VGA graphics, IPMI, 2x USB 3.0 rear, 1x USB 2.0 front
Software Compatibility
Accepts Windows 10® or Linux®
Export Compliance
ECCN: 5A992; Classification is dependent on configuration and is subject to change. Please contact your Program Manager to receive the classification for your product.