Lenovo ThinkSystem SR550 Maintenance Manual page 14

Table 1. Server specifications (continued)
Specification
Power supplies
Acoustical noise emissions
Minimal configuration for
debugging
ThinkSystem SR550 Maintenance Manual
6
Description
One or two hot-swap power supplies for redundancy support
• 550-watt ac 80 PLUS Platinum
• 750-watt ac 80 PLUS Platinum
• 750-watt ac 80 PLUS Titanium
• Sound power levels, idle
– 4.9 bels, minimum
– 5.3 bels, typical
– 6.1 bels, maximum
• Sound power levels, operating
– 4.9 bels, minimum
– 5.5 bels, typical
– 6.2 bels, maximum
Notes:
• These sound power levels are measured in controlled acoustical environments
according to procedures specified by ISO 7779 and are reported in accordance
with ISO 9296.
• The declared acoustic noise levels are based on specified configurations and they
may change depending on configurations/conditions.
• The declared acoustic noise levels may increase greatly, if high-power
components are installed, for example, some high-power NICs, CPUs, and GPUs.
• One processor in processor socket 1
• One DIMM in slot 3
• One power supply
• Three system fans (fan 1 to fan 3)