Lenovo Global Technology ThinkSystem ST45 V3 SPECpower_ssj2008 = 18,982 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: Nov 24, 2025
Hardware Availability: Nov-2025 Software Availability: Jun-2025 Publication: Jan 27, 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% 99.5% 2,700,053 104 25,874
90% 89.9% 2,440,517 104 23,562
80% 79.9% 2,169,856 103 21,124
70% 70.0% 1,900,987 101 18,892
60% 60.0% 1,629,927 86.9 18,763
50% 50.1% 1,358,767 65.6 20,720
40% 40.0% 1,085,282 55.1 19,679
30% 30.0% 814,844 51.7 15,769
20% 20.0% 542,270 49.8 10,893
10% 10.1% 273,520 44.9 6,089
Active Idle 0 20.6 0
∑ssj_ops / ∑power = 18,982
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: ThinkSystem ST45 V3
Form Factor: Tower
CPU Name: AMD EPYC 4465P
CPU Characteristics: 12 core, 3.4GHz, 64MB L3 Cache
CPU Frequency (MHz): 3400
CPU(s) Enabled: 12 cores, 1 chip, 12 cores/chip
Hardware Threads: 24 (2 / core)
CPU(s) Orderable: 1 chip
Primary Cache: 32 KB I + 64 KB D on chip per core
Secondary Cache: 512 KB I+D on chip per core
Tertiary Cache: 64 MB I+D off chip per chip
Other Cache: None
Memory Amount (GB): 32.0
# and size of DIMM: 2 x 16 GB
Memory Details: 2 x 16GB 1Rx8 PC5-5600;slots 1 and 2 populated
Power Supply Quantity and Rating (W): 1 x 300
Power Supply Details: Lenovo
Disk Drive: 1 x 480GB M.2 NVMe SSD P/N:4XB7A83139
Disk Controller: Integrated NVME controller
# and type of Network Interface Cards (NICs) Installed: 1 x ThinkSystem 1GbE RJ45 1-port
NICs Enabled in Firmware / OS / Connected: 1/1/1
Network Speed (Mbit): 1000
Keyboard: None
Mouse: None
Monitor: None
Optical Drives: No
Other Hardware: None
Software
Power Management: Enabled (see SUT Notes)
Operating System (OS): SUSE Linux Enterprise Server 15 SP7
OS Version: 6.4.0-150700.51-default
Filesystem: xfs
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 -Xmn1900m -Xms2048m -Xmx2048m -XX:ParallelGCThreads=2 -XX:+UseLargePages -XX:LargePageSizeInBytes=2m -XX:InlineSmallCode=1500 -XX:UseAVX=1 -XX:AutoBoxCacheMax=20000 -XX:+UseParallelGC -XX:+OptimizeFill -XX:+AggressiveHeap -XX:MaxInlineSize=270 -XX:FreqInlineSize=2500
JVM Affinity: for each even physicalCoreId { numactl -C physicalCoreId, physicalCoreId + 1, physicalCoreId + 24, physicalCoreId + 25}
JVM Instances: 6
JVM Initial Heap (MB): 2048
JVM Maximum Heap (MB): 2048
JVM Address Bits: 64
Boot Firmware Version: QIE105F
Management Firmware Version: None
Workload Version: SSJ 1.2.10
Director Location: Controller
Other Software: None
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 CEPREI LABORATORY CALIBRATION & TESTING CENTRB
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% 104 21.8
90% 104 21.8
80% 103 21.8
70% 101 21.8
60% 86.9 21.8
50% 65.6 21.5
40% 55.1 21.4
30% 51.7 21.4
20% 49.8 21.6
10% 44.9 21.6
Active Idle 20.6 21.5
Line Standard Minimum Temperature (°C) Elevation (m)
220V / 50 Hz / 1 phase / 2 wires 21.4 43
See the Power/Temperature Details Report for additional details.
Aggregate Performance Data
Target Load Actual Load ssj_ops
Target Actual
Calibration 1     2,491,782
Calibration 2     2,706,112
Calibration 3     2,723,474
ssj_ops@calibrated=2,714,793
100% 99.5% 2,714,793 2,700,053
90% 89.9% 2,443,314 2,440,517
80% 79.9% 2,171,834 2,169,856
70% 70.0% 1,900,355 1,900,987
60% 60.0% 1,628,876 1,629,927
50% 50.1% 1,357,397 1,358,767
40% 40.0% 1,085,917 1,085,282
30% 30.0% 814,438 814,844
20% 20.0% 542,959 542,270
10% 10.1% 271,479 273,520
Active Idle   0 0
Graph of results
See the Host Performance Report for additional details.