Lenovo Global Technology Think System SR650 V4 SPECpower_ssj2008 = 26,126 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: Jul 22, 2026
Hardware Availability: Jul-2026 Software Availability: Jun-2024 Publication: Aug 11, 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% 99.4% 25,507,370 886 28,805
90% 90.0% 23,095,498 828 27,902
80% 79.8% 20,473,255 655 31,271
70% 70.0% 17,963,503 571 31,435
60% 59.0% 15,141,860 497 30,439
50% 49.7% 12,756,200 443 28,767
40% 38.8% 9,964,113 389 25,596
30% 30.0% 7,699,527 349 22,051
20% 20.0% 5,130,083 302 16,986
10% 10.0% 2,563,086 252 10,187
Active Idle 0 198 0
∑ssj_ops / ∑power = 26,126
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 SR650 V4
Form Factor: 2U
CPU Name: Intel Xeon 6787P 2.0 GHz
CPU Characteristics: 86 core, 2.0GHz, 336MB L3 Cache
CPU Frequency (MHz): 2000
CPU(s) Enabled: 172 cores, 2 chips, 86 cores/chip
Hardware Threads: 344 (2 / core)
CPU(s) Orderable: 1,2 chips
Primary Cache: 64 KB I + 48 KB D on chip per core
Secondary Cache: 2 MB I+D on chip per core
Tertiary Cache: 336 MB I+D on chip per chips
Other Cache: None
Memory Amount (GB): 512
# and size of DIMM: 16 x 32768 MB
Memory Details: 32GB 2Rx8 PC5-6400-R; slots 1, 3, 5, 7, 10, 12, 14, 16, 17, 19, 21, 23, 26, 28, 30 and 32 populated
Power Supply Quantity and Rating (W): 2 x 1300
Power Supply Details: Lenovo P/N:4P57A88621
Disk Drive: 1 x 960GB 2.5" NVMe SSD P/N:4XB7A93066
Disk Controller: Integrated NvMe controller
# and type of Network Interface Cards (NICs) Installed: 1 x ThinkSystem Broadcom 5719 1GbE RJ45 4-port OCP Ethernet Adapter P/N:4XC7A08235
NICs Enabled in Firmware / OS / Connected: 4/4/1
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 SP6
OS Version: 6.4.0-150600.21-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:InlineSmallCode=1500 -XX:AutoBoxCacheMax=20000 -XX:+UseParallelGC -XX:FreqInlineSize=2500 -XX:CompileThresholdScaling=210
JVM Affinity: for each physicalCore { numactl -C physicalCoreId, physicalCoreId + 1 }
JVM Instances: 172
JVM Initial Heap (MB): 2048
JVM Maximum Heap (MB): 2048
JVM Address Bits: 64
Boot Firmware Version: ihe120l
Management Firmware Version: ihx430y
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 SR650
CPU Description: 2 x Intel Xeon Gold 5218
Memory amount (GB): 768
Software
Operating System (OS): Microsoft Windows Server 2019 DataCenter - Version 1809 (OS Build 17763.2268)
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: C3UG05013E
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: 1GA25011731-0007
Date of Calibration: 19-Sep-2025
PTDaemon Host System: same as CCS
PTDaemon Host OS: same as CCS
PTDaemon Version: 1.11.4-5bcc369b-20260119
Setup Description: Connected to PSU 1 PSU 2
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% 886 21.4
90% 828 21.4
80% 655 21.5
70% 571 21.4
60% 497 21.4
50% 443 21.6
40% 389 21.8
30% 349 21.9
20% 302 21.9
10% 252 21.9
Active Idle 198 21.9
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     24,304,779
Calibration 2     25,587,612
Calibration 3     25,718,640
ssj_ops@calibrated=25,653,126
100% 99.4% 25,653,126 25,507,370
90% 90.0% 23,087,813 23,095,498
80% 79.8% 20,522,501 20,473,255
70% 70.0% 17,957,188 17,963,503
60% 59.0% 15,391,876 15,141,860
50% 49.7% 12,826,563 12,756,200
40% 38.8% 10,261,250 9,964,113
30% 30.0% 7,695,938 7,699,527
20% 20.0% 5,130,625 5,130,083
10% 10.0% 2,565,313 2,563,086
Active Idle   0 0
Graph of results
See the Host Performance Report for additional details.