Lenovo Global Technology Think System SR665 V3 SPECpower_ssj2008 = 44,648 overall ssj_ops/watt
Test Sponsor: Lenovo Global Technology SPEC License #: 9017 Test Method: Single Node
Tested By: Lenovo Global Technology Test Location: Beijing, China Test Date: Feb 9, 2026
Hardware Availability: Jan-2026 Software Availability: Aug-2025 Publication: Mar 9, 2026
System Source: Single Supplier System Designation: Server Power Provisioning: Line-powered
Benchmark Results Summary
Performance Power Performance to Power Ratio
Target Load Actual Load ssj_ops Average Active Power (W)
100% 99.9% 38,497,690 736 52,339
90% 89.8% 34,630,340 620 55,823
80% 80.0% 30,841,297 574 53,713
70% 70.0% 26,975,750 533 50,574
60% 60.0% 23,128,562 488 47,359
50% 50.0% 19,273,883 442 43,608
40% 40.0% 15,421,754 392 39,331
30% 30.0% 11,567,362 340 34,006
20% 20.0% 7,705,142 284 27,089
10% 10.0% 3,857,965 227 17,013
Active Idle 0 109 0
∑ssj_ops / ∑power = 44,648
Graph of results
System Under Test
Set: 'sut'
Set Identifier: sut
Set Description: System Under Test
# of Identical Nodes: 1
Comment: 'SUT'
Hardware
Hardware Vendor: Lenovo Global Technology
Model: Think System SR665 V3
Form Factor: 2U
CPU Name: AMD EPYC 9845 2.1 GHz
CPU Characteristics: 160-Core,2.10GHz 320MB L3 Cache
CPU Frequency (MHz): 2100
CPU(s) Enabled: 320 cores, 2 chips, 160 cores/chip
Hardware Threads: 640 (2 / core)
CPU(s) Orderable: 1,2 chips
Primary Cache: 32 KB I + 48 KB D on chip per core
Secondary Cache: 1 MB I+D on chip per core
Tertiary Cache: 320 MB I+D on chip per chip
Other Cache: None
Memory Amount (GB): 384
# and size of DIMM: 24 x 16 GB
Memory Details: 24 x 16GB 1Rx8 PC5-6400-RD1; slots 1 to 24 populated
Power Supply Quantity and Rating (W): 1 x 1800
Power Supply Details: Lenovo P/N:4P57A78359
Disk Drive: 1 x 480GB M.2 SSD P/N:4XB7B07588 M.2 Module P/N:4Y37A79663
Disk Controller: Integrated SATA controller
# and type of Network Interface Cards (NICs) Installed: 1 x ThinkSystem 10/25GbE 2-Port Ethernet Adapter P/N:4XC7A08238
NICs Enabled in Firmware / OS / Connected: 2/2/1
Network Speed (Mbit): 10000
Keyboard: None
Mouse: None
Monitor: None
Optical Drives: No
Other Hardware: None
Software
Power Management: Enabled (see SUT Notes)
Operating System (OS): Microsoft Windows Server 2022 Datacenter
OS Version: Version 21H2(OS Build 20348.4052)
Filesystem: NTFS
JVM Vendor: Oracle Corporation
JVM Version: Java HotSpot(TM) 64-Bit Server VM (build 17.0.10+11-LTS-240, mixed mode, sharing), version 17.0.10
JVM Command-line Options: -server -Xmn1300m -Xms1550m -Xmx1550m -XX:ParallelGCThreads=2 -XX:+UseLargePages -XX:InlineSmallCode=1500 -XX:AllocatePrefetchDistance=256 -XX:AllocatePrefetchLines=8 -XX:AutoBoxCacheMax=20000 -XX:+UseParallelGC -XX:FreqInlineSize=2500 -XX:CompileThresholdScaling=210
JVM Affinity: start /NODE [0-19] /AFFINITY [0xF,0xF0,0xF00,0xF000,0xF0000,0xF00000,0xF000000,0xF0000000]
JVM Instances: 160
JVM Initial Heap (MB): 1550
JVM Maximum Heap (MB): 1550
JVM Address Bits: 64
Boot Firmware Version: KAE142F
Management Firmware Version: KAX364U
Workload Version: SSJ 1.2.10
Director Location: Controller
Other Software: KB5063880
Boot Firmware Settings
Management Firmware Settings
None
System Under Test Notes
Controller System
Hardware
Hardware Vendor: Lenovo Global Technology
Model: Thinksystem SR665
CPU Description: 2 x AMD EPYC 7773X
Memory amount (GB): 512
Software
Operating System (OS): Microsoft Windows Server 2022 DataCenter - Version 21H2 (OS Build 20348.1249)
JVM Vendor: Oracle Corporation
JVM Version: Oracle Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11, mixed mode), version 1.7.0_80
CCS Version: 1.2.6
Measurement Devices
Power Analyzer pwr1
Hardware Vendor: YOKOGAWA, Inc.
Model: WT310E
Serial Number: C3SH31010E
Connectivity: USB
Input Connection: Default
Metrology Institute: China National Accreditation Service for Conformity Assessment (CNAS)
Accredited by: CHINA CEPEREI LABORATORY CALIBRATION & TESTING CENTRE
Calibration Label: 1GA25011731-0002
Date of Calibration: 15-Sep-2025
PTDaemon Host System: same as CCS
PTDaemon Host OS: same as CCS
PTDaemon Version: 1.11.3-a7835373-20251015
Setup Description: Connected to PSU 1
Temperature Sensor temp1
Hardware Vendor: Digi International, Inc.
Model: Watchport/H
Driver Version: 5.70.105.0
Connectivity: USB
PTDaemon Host System: same as CCS
PTDaemon Host OS: same as CCS
Setup Description: 50 mm in front of SUT main intake
Notes
Aggregate Electrical and Environmental Data
Target Load Average Active Power (W) Minimum Ambient Temperature (°C)
100% 736 23.7
90% 620 23.8
80% 574 23.9
70% 533 24.1
60% 488 24.3
50% 442 24.4
40% 392 24.2
30% 340 24.1
20% 284 24.1
10% 227 24.1
Active Idle 109 24.2
Line Standard Minimum Temperature (°C) Elevation (m)
220V / 50 Hz / 1 phase / 2 wires 23.7 43
See the Power/Temperature Details Report for additional details.
Aggregate Performance Data
Target Load Actual Load ssj_ops
Target Actual
Calibration 1     36,491,920
Calibration 2     38,585,717
Calibration 3     38,510,302
ssj_ops@calibrated=38,548,009
100% 99.9% 38,548,009 38,497,690
90% 89.8% 34,693,209 34,630,340
80% 80.0% 30,838,408 30,841,297
70% 70.0% 26,983,607 26,975,750
60% 60.0% 23,128,806 23,128,562
50% 50.0% 19,274,005 19,273,883
40% 40.0% 15,419,204 15,421,754
30% 30.0% 11,564,403 11,567,362
20% 20.0% 7,709,602 7,705,142
10% 10.0% 3,854,801 3,857,965
Active Idle   0 0
Graph of results
See the Host Performance Report for additional details.