FABRIC Host Configurations by Site

This page provides detailed CPU information for FABRIC testbed sites, addressing the limitations of the current aggregate advertisements.

CPU Model Distribution

FABRIC testbed uses four AMD EPYC 7002/7003 series processor models:

• EPYC 7532 (32-core): Most common, used at 20 sites (67 total workers)
• EPYC 7543 (32-core): Used at 12 sites (36 total workers)
• EPYC 7542 (32-core): CERN only (6 workers)
• EPYC 7763 (64-core): EDUKY only (17 workers, higher core count)

CPU Configuration by Site and Node

The following table shows confirmed CPU models for all FABRIC worker nodes.

Confirmed CPU Models by Worker Node

CPU Model Distribution Summary

AMD EPYC 7532 (20 sites, 67 workers):
CLEM, DALL, FIU, GATECH, GPN, INDI, LBNL, MASS, MAX, MICH, NCSA, RENC, SALT, SRI, STAR, TACC, UCSD, UKY, UTAH, WASH

AMD EPYC 7543 (12 sites, 36 workers):
AMST, ATLA, BRIST, HAWI, KANS, LOSA, NEWY, PRIN, PSC, RUTG, SEAT, TOKY

AMD EPYC 7542 (1 site, 6 workers):
CERN only

AMD EPYC 7763 (1 site, 17 workers):
EDUKY only (higher core count)

CPU Model Specifications

Confirmed AMD EPYC processor models used in FABRIC testbed:

AMD EPYC 7532 (Most Common – 20 Sites)

• Generation: EPYC 7002 Series (Rome)
• Cores per CPU: 32
• Base Frequency: 2.4 GHz
• Max Boost: 3.3 GHz
• L3 Cache: 256 MB
• TDP: 200W
• Sites: CLEM, DALL, FIU, GATECH, GPN, INDI, LBNL, MASS, MAX, MICH, NCSA, RENC, SALT, SRI, STAR, TACC, UCSD, UKY, UTAH, WASH

AMD EPYC 7543 (12 Sites)

• Generation: EPYC 7003 Series (Milan)
• Cores per CPU: 32
• Base Frequency: 2.8 GHz
• Max Boost: 3.7 GHz
• L3 Cache: 256 MB
• TDP: 225W
• Performance: ~17% higher base frequency than 7532
• Sites: AMST, ATLA, BRIST, HAWI, KANS, LOSA, NEWY, PRIN, PSC, RUTG, SEAT, TOKY

AMD EPYC 7542 (CERN Only)

• Generation: EPYC 7002 Series (Rome)
• Cores per CPU: 32
• Base Frequency: 2.9 GHz
• Max Boost: 3.4 GHz
• L3 Cache: 128 MB
• TDP: 225W
• Performance: ~21% higher base frequency than 7532
• Sites: CERN only

AMD EPYC 7763 (EDUKY Only)

• Generation: EPYC 7003 Series (Milan)
• Cores per CPU: 64
• Base Frequency: 2.45 GHz
• Max Boost: 3.5 GHz
• L3 Cache: 256 MB
• TDP: 280W
• Special: Double the core count of other models
• Sites: EDUKY only

Frequency Differences Matter

Performance variations between FABRIC’s EPYC models (relative to 7532 baseline):

Key Insights:

• The 7543 (Milan) has ~17% higher base frequency than the 7532 (Rome)
• The 7542 at CERN has the highest base frequency among 32-core models (~21% higher than 7532)
• The 7763 at EDUKY has double the cores (64 vs 32) with similar frequency to 7532
• Generation matters: Milan (7003) models generally have better IPC than Rome (7002)

Additional Resources

• AMD EPYC 7002 Series Processors
• Dell PowerEdge R7525 Specifications
• FABRIC Portal
• FABRIC Learn – Hardware Configurations

Last Updated: January 2026

Note: This documentation is based on confirmed CPU model information from the FABRIC testbed deployment.