Dell Inc. PowerEdge R7725 SPECpower_ssj2008 = 13,686 overall ssj_ops/watt
Test Sponsor: Dell Inc. SPEC License #: 6573 Test Method: Single Node
Tested By: Dell Inc. Test Location: Round Rock, TX, USA Test Date: Dec 19, 2025
Hardware Availability: Nov-2024 Software Availability: Jul-2025 Publication: Apr 22, 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% 99.7% 16,374,959 883 18,537
90% 90.0% 14,788,201 857 17,253
80% 80.0% 13,139,580 825 15,934
70% 70.0% 11,506,912 763 15,076
60% 60.0% 9,853,086 704 14,004
50% 50.0% 8,219,702 643 12,789
40% 40.0% 6,566,031 532 12,347
30% 30.0% 4,930,659 445 11,090
20% 20.0% 3,288,436 406 8,102
10% 10.0% 1,646,253 353 4,669
Active Idle 0 190 0
∑ssj_ops / ∑power = 13,686
Graph of results
System Under Test
Set: 'sut'
Set Identifier: sut
Set Description: System Under Test
# of Identical Nodes: 1
Comment: PowerEdge R7725
Hardware
Hardware Vendor: Dell Inc.
Model: PowerEdge R7725
Form Factor: 2U
CPU Name: AMD EPYC 9355 3.55 GHz
CPU Characteristics: 32 core, 3.55 GHz, 256 MB L3 Cache, Max Boost Clock up to 4.4 GHz
CPU Frequency (MHz): 3550
CPU(s) Enabled: 64 cores, 2 chips, 32 cores/chip
Hardware Threads: 128 (2 / core)
CPU(s) Orderable: 1,2 chip
Primary Cache: 32 KB I + 48 KB D on chip per core
Secondary Cache: 1 MB I+D on chip per core
Tertiary Cache: 256 MB I+D on chip per chip, 32 MB shared / 4 cores
Other Cache: None
Memory Amount (GB): 1536
# and size of DIMM: 24 x 64 GB
Memory Details: 64 GB 2Rx4 PC5-6400-R, Slots A1-12, B1-12 populated.
Power Supply Quantity and Rating (W): 2 x 3200
Power Supply Details: 2 x Delta 3200W Titanium Efficiency (DPN - J0KHH)
Disk Drive: 4 x 3.84 TB E3.S NVMe (DPN - 6RC59), 2 x 480 GB M.2 NVMe (DPN - 3JC4V)
Disk Controller: Onboard PCIe SSD Backplane, PCIe attached Boot Optimized Storage (BOSS) card
# and type of Network Interface Cards (NICs) Installed: 1 x Broadcom 5719 Quad Port 1GbE LOM, 1 x Broadcom 57414 Dual Port 25GbE LOM
NICs Enabled in Firmware / OS / Connected: 6/6/1
Network Speed (Mbit): 1000
Keyboard: None
Mouse: None
Monitor: None
Optical Drives: No
Other Hardware: None
Software
Power Management: Balanced power plan in OS (see SUT notes)
Operating System (OS): Microsoft Windows Server 2025 Datacenter
OS Version: Version 24H2 (OS Build 26100.1)
Filesystem: NTFS
JVM Vendor: Oracle Corporation
JVM Version: Java HotSpot(TM) 64-Bit Server VM (build 17.0.16+12-LTS-247, mixed mode, sharing)
JVM Command-line Options: -server -Xms1500m -Xmx1500m -Xmn1300m -XX:+UseParallelGC -XX:ParallelGCThreads=2 -XX:+UseLargePages -XX:LargePageSizeInBytes=2m -XX:+UseBiasedLocking -XX:InlineSmallCode=1500 -XX:UseAVX=1 -XX:AutoBoxCacheMax=20000 -XX:+OptimizeFill -XX:+AggressiveHeap
JVM Affinity: start /NODE [0-15] /AFFINITY [0xF,0xF0]
JVM Instances: 32
JVM Initial Heap (MB): 1500
JVM Maximum Heap (MB): 1500
JVM Address Bits: 64
Boot Firmware Version: 1.5.3
Management Firmware Version: 1.20.80.50 A00
Workload Version: SSJ 1.2.10
Director Location: Controller
Other Software: None
Boot Firmware Settings
Management Firmware Settings
Minimum Power (Performance per Watt Optimized)
System Under Test Notes
Controller System
Hardware
Hardware Vendor: Dell Inc
Model: PowerEdge T150
CPU Description: Intel Xeon E-2378, 2.60 GHz
Memory amount (GB): 32
Software
Operating System (OS): Microsoft Windows Server 2022 Datacenter
JVM Vendor: Oracle Corporation
JVM Version: Hotspot(TM) Client VM, version 15.0.2+7 (build 15.0.2+7, mixed mode)
CCS Version: 1.2.6
Measurement Devices
Power Analyzer pwr1
Hardware Vendor: Yokogawa Meters and Instruments Corporation
Model: WT310
Serial Number: T11733384
Connectivity: RS-232
Input Connection: Default
Metrology Institute: NIST
Accredited by: TesCom
Calibration Label: T126624
Date of Calibration: 13-Aug-2025
PTDaemon Host System: same as CCS
PTDaemon Host OS: same as CCS
PTDaemon Version: 1.11.1-462c978e-20240907
Setup Description: Connected to power supply
Temperature Sensor temp1
Hardware Vendor: Digi International Inc.
Model: Watchport/H
Driver Version: 5.10.26.0
Connectivity: USB
PTDaemon Host System: same as CCS
PTDaemon Host OS: same as CCS
Setup Description: 25 mm in front of SUT main airflow intake
Notes
None
Aggregate Electrical and Environmental Data
Target Load Average Active Power (W) Minimum Ambient Temperature (°C)
100% 883 25.9
90% 857 25.9
80% 825 25.8
70% 763 25.8
60% 704 25.8
50% 643 25.6
40% 532 25.6
30% 445 25.5
20% 406 25.5
10% 353 25.6
Active Idle 190 25.5
Line Standard Minimum Temperature (°C) Elevation (m)
208V / 60 Hz / 1 phase / 2 wires 25.5 255
See the Power/Temperature Details Report for additional details.
Aggregate Performance Data
Target Load Actual Load ssj_ops
Target Actual
Calibration 1     16,617,708
Calibration 2     16,434,663
Calibration 3     16,422,965
ssj_ops@calibrated=16,428,814
100% 99.7% 16,428,814 16,374,959
90% 90.0% 14,785,933 14,788,201
80% 80.0% 13,143,051 13,139,580
70% 70.0% 11,500,170 11,506,912
60% 60.0% 9,857,289 9,853,086
50% 50.0% 8,214,407 8,219,702
40% 40.0% 6,571,526 6,566,031
30% 30.0% 4,928,644 4,930,659
20% 20.0% 3,285,763 3,288,436
10% 10.0% 1,642,881 1,646,253
Active Idle   0 0
Graph of results
See the Host Performance Report for additional details.