Product guide

Chapter 1: System Description QSSC-S4R Server System Product Guide
Version 1.0
24
 Supports DDR3 JEDEC standard temperature sensors on all DIMMs.
 LED fault indicators for each DIMM.
 On board voltage regulators for 0.75V, 1.1V, 1.5V and 1.8V.
 One Field Replaceable Unit (FRU).
 Supports memory RAS features including Lock Step mode, Interleaving, Mirroring Mode, Sparing Mode and
Hemisphere Mode.
Item Description
A Attention Button
B Attention LED
C Power LED
D Mirror Ready LED
E DIMM Fault LEDs 1-8
Figure 19. Memory riser LEDs and connectors
Item LED Color/Behavior State
DIMM Fault LED 1B First
pair
Amber-On
1B DIMM fault
1D 1D DIMM fault
1A Second
pair
1A DIMM fault
1C 1C DIMM fault
2B Third
pair
2B DIMM fault
2D 2D DIMM fault
2A Fourth
pair
2A DIMM fault
2C 2C DIMM fault
Mirror Activity LED Green – On Mirror activity
Power LED Green – On Power is on
Off Power is off
Attention LED Amber – On Attention button is
pressed.
The DIMM slots on the memory riser are divided into upper right and lower left DIMM slot areas, numbered in
pairs in the order of 1B + 1D, 2B + 2D, 1A + 1C and 2A + 2C, as shown in Figure 60. See ”Supported Memory
Configurations” on page 69 for population rules.