Lenovo Global Technology ThinkSystem SR850 V4 SPECpower_ssj2008 = 24,128 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: Oct 17, 2025
Hardware Availability: Nov-2025 Software Availability: Jun-2025 Publication: Nov 4, 2025
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% 99.1% 44,336,717 1,566 28,315
90% 89.4% 39,986,223 1,383 28,904
80% 79.7% 35,657,209 1,217 29,303
70% 69.6% 31,160,112 1,088 28,641
60% 59.9% 26,806,415 986 27,176
50% 50.0% 22,364,281 878 25,473
40% 40.0% 17,898,036 789 22,686
30% 30.0% 13,421,914 698 19,217
20% 20.0% 8,950,894 607 14,742
10% 10.0% 4,482,014 515 8,702
Active Idle 0 429 0
∑ssj_ops / ∑power = 24,128
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 SR850 V4
Form Factor: 2U
CPU Name: Intel Xeon 6788P 2.0 GHz
CPU Characteristics: 86 core, 2.0GHz, 336MB L3 Cache
CPU Frequency (MHz): 2000
CPU(s) Enabled: 344 cores, 4 chips, 86 cores/chip
Hardware Threads: 688 (2 / core)
CPU(s) Orderable: 1,2,3,4 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): 1024
# and size of DIMM: 32 x 32 GB
Memory Details: 32 x 32GB 1Rx4 PC5-6400;slots 1, 3, 5, 7, 10, 12, 14, 16, 17, 19, 21, 23, 26, 28, 30, 32, 33, 35, 37, 39, 42, 44, 46, 48, 49, 51, 53, 55, 58, 60, 62 and 64 populated
Power Supply Quantity and Rating (W): 2 x 2000
Power Supply Details: Lenovo P/N:4P57A88689
Disk Drive: 1 x 960GB M.2 NVMe SSD P/N:4XB7A13999
Disk Controller: Integrated NVME controller
# and type of Network Interface Cards (NICs) Installed: 1 x ThinkSystem Broadcom 1GbE RJ45 4-port OCP P/N:7ZT7A00484
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 SP7
OS Version: 6.4.0-150700.51-default
Filesystem: xfs
JVM Vendor: Oracle Corporation
JVM Version: Oracle 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 physicalCore { numactl -C physicalCoreId, physicalCoreId + 1 }
JVM Instances: 344
JVM Initial Heap (MB): 2048
JVM Maximum Heap (MB): 2048
JVM Address Bits: 64
Boot Firmware Version: RVE104X
Management Firmware Version: IHX416W
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 SR645
CPU Description: 2 x AMD EPYC 7763 2.45GHz
Memory amount (GB): 512
Software
Operating System (OS): Microsoft Windows Server 2019 DataCenter - Version 1809 (OS Build 17763.1217)
JVM Vendor: Oracle Corporation
JVM Version: Oracle Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.4+10-LTS, mixed mode)
CCS Version: 1.2.6
Measurement Devices
Power Analyzer pwr1
Hardware Vendor: YOKOGAWA, Inc.
Model: WT310E
Serial Number: C3UG05014E
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: 1GA25011731-0004
Date of Calibration: 15-Sep-2025
PTDaemon Host System: same as CCS
PTDaemon Host OS: same as CCS
PTDaemon Version: 1.11.1-462c978e-20240907
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% 1,566 21.3
90% 1,383 21.2
80% 1,217 21.4
70% 1,088 21.5
60% 986 21.6
50% 878 21.6
40% 789 21.6
30% 698 21.7
20% 607 21.7
10% 515 21.6
Active Idle 429 21.6
Line Standard Minimum Temperature (°C) Elevation (m)
220V / 50 Hz / 1 phase / 2 wires 21.2 43
See the Power/Temperature Details Report for additional details.
Aggregate Performance Data
Target Load Actual Load ssj_ops
Target Actual
Calibration 1     44,968,280
Calibration 2     44,759,186
Calibration 3     44,738,930
ssj_ops@calibrated=44,749,058
100% 99.1% 44,749,058 44,336,717
90% 89.4% 40,274,152 39,986,223
80% 79.7% 35,799,246 35,657,209
70% 69.6% 31,324,340 31,160,112
60% 59.9% 26,849,435 26,806,415
50% 50.0% 22,374,529 22,364,281
40% 40.0% 17,899,623 17,898,036
30% 30.0% 13,424,717 13,421,914
20% 20.0% 8,949,812 8,950,894
10% 10.0% 4,474,906 4,482,014
Active Idle   0 0
Graph of results
See the Host Performance Report for additional details.