Dell Inc. PowerEdge XR8720t (Intel Xeon 6776P-B) SPECpower_ssj2008 = 21,433 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: Apr 9, 2026
Hardware Availability: Mar-2026 Software Availability: Mar-2026 Publication: May 12, 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% 10,984,179 454 24,181
90% 89.9% 9,897,102 414 23,931
80% 79.9% 8,796,557 358 24,576
70% 70.0% 7,702,255 303 25,452
60% 59.9% 6,596,570 262 25,204
50% 50.1% 5,508,437 228 24,181
40% 40.0% 4,404,871 199 22,109
30% 30.0% 3,300,064 177 18,679
20% 20.0% 2,201,585 158 13,897
10% 10.0% 1,098,349 141 7,767
Active Idle 0 129 0
∑ssj_ops / ∑power = 21,433
Graph of results
System Under Test
Set: 'sut'
Set Identifier: sut
Set Description: System Under Test
# of Identical Nodes: 1
Comment: PowerEdge XR8720t
Hardware
Hardware Vendor: Dell Inc.
Model: PowerEdge XR8720t (Intel Xeon 6776P-B)
Form Factor: 2U
CPU Name: Intel Xeon 6776P-B
CPU Characteristics: 72 core, 2300 MHz, 288 MB L3 Cache, Max frequency 3500 MHz
CPU Frequency (MHz): 2300
CPU(s) Enabled: 72 cores, 1 chip, 72 cores/chip
Hardware Threads: 144 (2 / core)
CPU(s) Orderable: 1 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: 288 MB I+D on chip per chip
Other Cache: None
Memory Amount (GB): 256
# and size of DIMM: 8 x 32 GB
Memory Details: 32 GB 2Rx8 PC5-6400B-R, slots A1 A2 A3 A4 A5 A6 A7 A8 populated.
Power Supply Quantity and Rating (W): 1 x 1800
Power Supply Details: 1 x 1800W Titanium Efficiency (SKU: 450-BCXB)
Disk Drive: 1 x 960 GB NVMe M.2 SSD
Disk Controller: Integrated PCIe Controller
# and type of Network Interface Cards (NICs) Installed: 1 x Intel Ethernet Connection E825-C for QSFP (rev 04)
NICs Enabled in Firmware / OS / Connected: 2/2/2
Network Speed (Mbit): 10000
Keyboard: None
Mouse: None
Monitor: None
Optical Drives: No
Other Hardware: None
Software
Power Management: System DBPM (DAPC) enabled in BIOS; operating system used default power management settings with no explicit power mode or tuned profile configured.
Operating System (OS): Red Hat Enterprise Linux 10.0 (Coughlan)
OS Version: 6.12.0-55.9.1.el10_0.x86_64
Filesystem: xfs
JVM Vendor: Oracle
JVM Version: Java HotSpot(TM) 64-Bit Server VM(build 17.0.11+7-LTS-207, mixed mode)
JVM Command-line Options: -server -Xms1024m -Xmx1024m -Xmn800m -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: for each physicalCore { numactl -C physicalCoreId, physicalCoreId + 64}
JVM Instances: 72
JVM Initial Heap (MB): 1024
JVM Maximum Heap (MB): 1024
JVM Address Bits: 64
Boot Firmware Version: 1.1.3
Management Firmware Version: 1.30.10.50
Workload Version: SSJ 1.2.10
Director Location: Controller
Other Software: None
Boot Firmware Settings
Management Firmware Settings
Enabled (see SUT notes)
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% 454 23.2
90% 414 23.2
80% 358 23.2
70% 303 23.3
60% 262 23.4
50% 228 23.4
40% 199 23.3
30% 177 23.4
20% 158 23.4
10% 141 23.5
Active Idle 129 23.5
Line Standard Minimum Temperature (°C) Elevation (m)
208V / 60 Hz / 1 phase / 2 wires 23.2 255
See the Power/Temperature Details Report for additional details.
Aggregate Performance Data
Target Load Actual Load ssj_ops
Target Actual
Calibration 1     11,170,196
Calibration 2     11,015,698
Calibration 3     10,993,089
ssj_ops@calibrated=11,004,394
100% 99.8% 11,004,394 10,984,179
90% 89.9% 9,903,954 9,897,102
80% 79.9% 8,803,515 8,796,557
70% 70.0% 7,703,075 7,702,255
60% 59.9% 6,602,636 6,596,570
50% 50.1% 5,502,197 5,508,437
40% 40.0% 4,401,757 4,404,871
30% 30.0% 3,301,318 3,300,064
20% 20.0% 2,200,879 2,201,585
10% 10.0% 1,100,439 1,098,349
Active Idle   0 0
Graph of results
See the Host Performance Report for additional details.