Dell Inc. PowerEdge R770AP (Intel Xeon 6980P) SPECpower_ssj2008 = 22,805 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: Jan 11, 2026
Hardware Availability: Dec-2025 Software Availability: Dec-2025 Publication: Jan 27, 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% 99.8% 31,355,659 1,185 26,457
90% 90.0% 28,281,993 1,114 25,396
80% 80.0% 25,133,769 888 28,296
70% 70.0% 22,006,300 812 27,118
60% 60.0% 18,867,675 738 25,571
50% 50.0% 15,708,551 664 23,666
40% 40.0% 12,560,584 588 21,364
30% 30.0% 9,437,727 516 18,281
20% 20.0% 6,295,701 450 13,989
10% 10.0% 3,135,646 381 8,232
Active Idle 0 241 0
∑ssj_ops / ∑power = 22,805
Graph of results
System Under Test
Set: 'sut'
Set Identifier: sut
Set Description: System Under Test
# of Identical Nodes: 1
Comment: PowerEdge R770AP
Hardware
Hardware Vendor: Dell Inc.
Model: PowerEdge R770AP (Intel Xeon 6980P)
Form Factor: 2U
CPU Name: Intel Xeon 6980P 2.0 GHz
CPU Characteristics: 128 core, 2.0 GHz, 504 MB L3 Cache, Max Boost Clock up to 3.9 GHz
CPU Frequency (MHz): 2000
CPU(s) Enabled: 256 cores, 2 chips, 256 cores/chip
Hardware Threads: 512 (2 / core)
CPU(s) Orderable: 1,2 chip
Primary Cache: 64 KB I + 48 KB D on chip per core
Secondary Cache: 2 MB I+D on chip per core
Tertiary Cache: 504 MB I+D on chip per chip
Other Cache: None
Memory Amount (GB): 768
# and size of DIMM: 24 x 32 GB
Memory Details: 32 GB 2Rx4 PC5-6400-R running at 6400MHz Slots A1-12, B1-12 populated.
Power Supply Quantity and Rating (W): 1 x 3200
Power Supply Details: 3200W Titanium Efficiency
Disk Drive: 1 x 960 GB NVMe Gen4
Disk Controller: PCIe SSD Backplane
# and type of Network Interface Cards (NICs) Installed: 1 x Intel(R) Eth Ntwk Adptr OCP 3.0 E610-IT4
NICs Enabled in Firmware / OS / Connected: 4/3/2
Network Speed (Mbit): 2500
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 2022 Datacenter
OS Version: 21H2 (OS Build 20348.587)
Filesystem: NTFS
JVM Vendor: Oracle Corporation
JVM Version: Java HotSpot(TM) 64-Bit Server VM (build 17.0.14+8-LTS-191, mixed mode, sharing)
JVM Command-line Options: -server -Xms2048m -Xmx2048m -Xmn1900m -XX:+UseParallelGC -XX:ParallelGCThreads=2 -XX:SurvivorRatio=1 -XX:TargetSurvivorRatio=95 -XX:+UseLargePages -XX:LargePageSizeInBytes=2m -XX:+UseBiasedLocking -XX:InlineSmallCode=1500 -XX:UseAVX=1 -XX:AutoBoxCacheMax=20000 -XX:+OptimizeFill -XX:+AggressiveHeap -XX:AllocatePrefetchDistance=256 -XX:AllocatePrefetchLines=16
JVM Affinity: start /NODE [0-41] /AFFINITY [0x3,0xC,0x30,0xC0,0x300,0xC00] in addition [0,7,21,28] /AFFINITY [0x3000]
JVM Instances: 256
JVM Initial Heap (MB): 2048
JVM Maximum Heap (MB): 2048
JVM Address Bits: 64
Boot Firmware Version: 1.1.6
Management Firmware Version: 10.20.80.50 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 R650xs
CPU Description: 2 x Intel Xeon Gold 5315Y, 3.20 GHz
Memory amount (GB): 512
Software
Operating System (OS): Microsoft Windows Server 2022 Standard
JVM Vendor: Oracle Corporation
JVM Version: Java Development Kit 15.0.2
CCS Version: 1.2.6
Measurement Devices
Power Analyzer pwr1
Hardware Vendor: Yokogawa Meters and Instruments Corporation
Model: WT310
Serial Number: T11733387
Connectivity: RS-232
Input Connection: Default
Metrology Institute: NIST
Accredited by: TesCom
Calibration Label: T126625
Date of Calibration: 13-Aug-2025
PTDaemon Host System: same as CCS
PTDaemon Host OS: same as CCS
PTDaemon Version: 1.11.3-a7835373-20251015
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% 1,185 21.1
90% 1,114 21.2
80% 888 21.1
70% 812 21.1
60% 738 21.1
50% 664 21.1
40% 588 21.1
30% 516 21.1
20% 450 21.1
10% 381 21.1
Active Idle 241 21.0
Line Standard Minimum Temperature (°C) Elevation (m)
208V / 60 Hz / 1 phase / 2 wires 21.0 255
See the Power/Temperature Details Report for additional details.
Aggregate Performance Data
Target Load Actual Load ssj_ops
Target Actual
Calibration 1     31,871,663
Calibration 2     31,408,326
Calibration 3     31,437,126
ssj_ops@calibrated=31,422,726
100% 99.8% 31,422,726 31,355,659
90% 90.0% 28,280,453 28,281,993
80% 80.0% 25,138,181 25,133,769
70% 70.0% 21,995,908 22,006,300
60% 60.0% 18,853,636 18,867,675
50% 50.0% 15,711,363 15,708,551
40% 40.0% 12,569,090 12,560,584
30% 30.0% 9,426,818 9,437,727
20% 20.0% 6,284,545 6,295,701
10% 10.0% 3,142,273 3,135,646
Active Idle   0 0
Graph of results
See the Host Performance Report for additional details.