Lenovo Global Technology ThinkSystem SR850 V4 SPECpower_ssj2008 = 22,974 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: Sep 4, 2025
Hardware Availability: Nov-2025 Software Availability: Jan-2024 Publication: Sep 26, 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% 99.6% 43,518,135 1,578 27,586
90% 90.0% 39,322,471 1,447 27,168
80% 80.0% 34,958,944 1,260 27,750
70% 70.0% 30,571,038 1,129 27,077
60% 60.0% 26,206,235 1,006 26,048
50% 50.0% 21,839,215 893 24,447
40% 40.0% 17,474,552 793 22,046
30% 30.0% 13,093,563 711 18,407
20% 20.0% 8,746,395 635 13,774
10% 10.0% 4,370,663 549 7,960
Active Idle 0 450 0
∑ssj_ops / ∑power = 22,974
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): Microsoft Windows Server 2022 Datacenter
OS Version: Version 21H2(OS Build 20348.2227)
Filesystem: NTFS
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: start /NODE[0,2,4,6,8,10,12,14] /AFFINITY [0xF, 0xF0, 0xF00, 0xF000, 0xF000, 0xF0000, 0xF00000, 0xF000000, 0xF0000000, 0xF00000000, 0xF000000000] start /NODE[1,3,5,7,9,11,13,15] /AFFINITY [0x3F, 0xFC0, 0x3F000, 0xFC0000, 0x3F000000, FC0000000, 0x3F000000000]
JVM Instances: 144
JVM Initial Heap (MB): 2048
JVM Maximum Heap (MB): 2048
JVM Address Bits: 64
Boot Firmware Version: RVE103X
Management Firmware Version: IHX415V
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: 1GA24011968-0003
Date of Calibration: 26-Sep-2024
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% 1,578 22.2
90% 1,447 22.2
80% 1,260 22.3
70% 1,129 22.3
60% 1,006 22.2
50% 893 22.2
40% 793 22.1
30% 711 22.1
20% 635 22.1
10% 549 22.2
Active Idle 450 22.3
Line Standard Minimum Temperature (°C) Elevation (m)
220V / 50 Hz / 1 phase / 2 wires 22.1 43
See the Power/Temperature Details Report for additional details.
Aggregate Performance Data
Target Load Actual Load ssj_ops
Target Actual
Calibration 1     36,067,810
Calibration 2     43,642,530
Calibration 3     43,709,689
ssj_ops@calibrated=43,676,110
100% 99.6% 43,676,110 43,518,135
90% 90.0% 39,308,499 39,322,471
80% 80.0% 34,940,888 34,958,944
70% 70.0% 30,573,277 30,571,038
60% 60.0% 26,205,666 26,206,235
50% 50.0% 21,838,055 21,839,215
40% 40.0% 17,470,444 17,474,552
30% 30.0% 13,102,833 13,093,563
20% 20.0% 8,735,222 8,746,395
10% 10.0% 4,367,611 4,370,663
Active Idle   0 0
Graph of results
See the Host Performance Report for additional details.