Environmental specifications
Summary of the environmental specifications of server. Depending on the model, some features might not be 
available, or some specifications might not apply. The latest specifications information is always available at 
https://lenovopress.lenovo.com/.
Acoustical noise emissions
The server has the following acoustic noise emissions declaration. 
Minimal Typical Storage
GPU
Sound power levels (L
WAd)
Idling 5.9 Bel 6.5 Bel 7.3 Bel  7.3 Bel 
Operating
6.5 Bel 8.1 Bel 7.5 Bel  8.7 Bel
Sound pressure level (LpAm)
Idling 41.5 dBA 51 dBA 60.2 dBA 60.2 dBA
Operating 48.3 dBA 66.6 dBA 61.3 dBA 71.9 dBA
The declared sound levels are based on the following configurations, which may change depending on configurations 
or conditions.
Config.
Minimal
Typical Storage
GPU
Chassis 
(2U)
Front 8 x 2.5'' Front 16 x 2.5'' Front 12 x 3.5'' + rear 4 
x 2.5''
Front 16 x 2.5''
Fan 6 x standard fans 6 x high performance 
fans
6 x high performance 
fans
6 x high performance 
fans
Processor 2 x 240 W 2 x 300 W 2 x 240 W 2 x 300 W
DIMM
12 x 64 GB 24 x 64 GB 12 x 64 GB 24 x 64 GB
Drive 8 x 2.4 TB SAS HDDs 16 x 2.4 TB SAS HDDs
Front 12 x 14 TB + rear 
4 x 2 TB SAS HDDs
16 x 2.4 TB SAS HDDs
RAID 1 x RAID 940-8i 1 x RAID 940-8i 1 x RAID 940-16i 1 x RAID 940-16i
OCP 1 x Intel E810-DA2 10/25GbE SFP28 2-Port OCP
PSU 2 x 1100 W 2 x 1800 W 2 x 1800 W 2 x 2400 W
GPU None None None 3 x A100
Notes: 
•  These sound levels were measured in controlled acoustical environments according to procedures specified by 
ISO7779 and are reported in accordance with ISO 9296.
•  Government regulations (such as those prescribed by OSHA or European Community Directives) may govern noise 
level exposure in the workplace and may apply to you and your server installation. The actual sound pressure levels 
in your installation depend upon a variety of factors, including the number of racks in the installation; the size, 
materials, and configuration of the room; the noise levels from other equipment; the room ambient temperature, and 
employee's location in relation to the equipment. Further, compliance with such government regulations depends 
on a variety of additional factors, including the duration of employees' exposure and whether employees wear 
hearing protection. Lenovo recommends that you consult with qualified experts in this field to determine whether 
you are in compliance with the applicable regulations.
8 ThinkSystem SR665 V3 User Guide