Lenovo Global Technology Think System SR650 V4 SPECpower_ssj2008 = 26,777 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: Jun 4, 2026
Hardware Availability: Mar-2026 Software Availability: Nov-2025 Publication: Jun 30, 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% 100.1% 22,964,995 698 32,897
90% 87.6% 20,107,019 611 32,899
80% 79.8% 18,301,323 560 32,702
70% 70.0% 16,058,731 520 30,878
60% 60.0% 13,776,117 461 29,889
50% 50.0% 11,482,405 417 27,531
40% 40.0% 9,177,927 375 24,482
30% 30.0% 6,874,261 338 20,336
20% 20.0% 4,586,153 298 15,406
10% 10.0% 2,296,116 252 9,122
Active Idle 0 162 0
∑ssj_ops / ∑power = 26,777
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 off chip per chip
Other Cache: None
Memory Amount (GB): 512
# and size of DIMM: 16 x 32768 MB
Memory Details: 32GB 2Rx8 PC5-6400B-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): Microsoft Windows Server 2022 Datacenter
OS Version: Version 21H2(OS Build 20348.4405)
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 -Xmn1900m -Xms2048m -Xmx2048m -XX:ParallelGCThreads=2 -XX:+UseLargePages -XX:InlineSmallCode=1500 -XX:AutoBoxCacheMax=20000 -XX:+UseParallelGC -XX:FreqInlineSize=2500 -XX:CompileThresholdScaling=210
JVM Affinity: start /NODE [0,2,4,6] /AFFINITY [0x3,0xc,0x30,0xc0,0x300,0xc00,0x3000,0xc000,0x30000,0xc0000,0x300000,0xc00000,0x3000000,0xc000000,0x30000000,0xc0000000,0x300000000,0xc00000000,0x3000000000,0xc000000000,0x30000000000,0xc0000000000] start /NODE [1,3,5,7] /AFFINITY [0x3,0xc,0x30,0xc0,0x300,0xc00,0x3000,0xc000,0x30000,0xc0000,0x300000,0xc00000,0x3000000,0xc000000,0x30000000,0xc0000000,0x300000000,0xc00000000,0x3000000000,0xc000000000,0x30000000000]
JVM Instances: 172
JVM Initial Heap (MB): 2048
JVM Maximum Heap (MB): 2048
JVM Address Bits: 64
Boot Firmware Version: IHE118B
Management Firmware Version: IHX414J
Workload Version: SSJ 1.2.10
Director Location: Controller
Other Software: KB5068787
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% 698 22.2
90% 611 22.1
80% 560 22.0
70% 520 21.8
60% 461 21.8
50% 417 21.8
40% 375 21.8
30% 338 21.9
20% 298 21.9
10% 252 21.9
Active Idle 162 21.8
Line Standard Minimum Temperature (°C) Elevation (m)
220V / 50 Hz / 1 phase / 2 wires 21.8 43
See the Power/Temperature Details Report for additional details.
Aggregate Performance Data
Target Load Actual Load ssj_ops
Target Actual
Calibration 1     21,492,900
Calibration 2     22,844,205
Calibration 3     23,043,260
ssj_ops@calibrated=22,943,732
100% 100.1% 22,943,732 22,964,995
90% 87.6% 20,649,359 20,107,019
80% 79.8% 18,354,986 18,301,323
70% 70.0% 16,060,613 16,058,731
60% 60.0% 13,766,239 13,776,117
50% 50.0% 11,471,866 11,482,405
40% 40.0% 9,177,493 9,177,927
30% 30.0% 6,883,120 6,874,261
20% 20.0% 4,588,746 4,586,153
10% 10.0% 2,294,373 2,296,116
Active Idle   0 0
Graph of results
See the Host Performance Report for additional details.