Intel® Xeon® 6900/6700/6500-Series Processors with P-Cores

Specification Update

ID Date Version Classification
835486 02/11/2026 Public

Errata Summary Table

Errata Summary Table

Erratum ID Processor Stepping UCC/XCC/HCC Title
GNR1 No Fix Intel® VT-d Remapping Hardware Does Not Perform Reserved(0) Check on PGSNP Field of Scalable-Mode PASID Table Entry
GNR2 No Fix Remapping Hardware May Set Access/Dirty Bits in a First-stage Page-table Entry
GNR3 No Fix Machine Check Bank 4 UCNA Errors May Not be Signaled
GNR4 No Fix Platform May Hang if System Software Sends a Page Group Response or DevTLB Invalidation to Non-existent Requester ID
GNR5 No Fix Remapping Hardware Implements Bits [31:16] of the three Event Data Registers (VTDBAR offsets 0x3C, 0xA4, and 0xE4) as Read-Writable
GNR6 No Fix Processor May Hang if Warm Reset Triggers During BIOS Initialization
GNR7 No Fix Unexpected Rollover in MBM Counters
GNR8 No Fix Remapping Hardware May Encounter Incorrect Error Code in Invalidation Queue Error Record Register
GNR9 No Fix Performance Monitoring Events TOPDOWN.BACKEND_​BOUND_​SLOTS and IDQ_​BUBBLES May be Inaccurate
GNR10 No Fix Performance Monitoring Event IDQ.MS_​UOPS May Undercount
GNR11 No Fix TILEDATA State May Be Saved Incorrectly
GNR12 No Fix RDT MBM May Overcount Memory Bandwidth Measurements
GNR13 No Fix Intel® QAT Accelerator May Violate ATS Invalidation Completion Ordering
GNR14 No Fix Intel QAT Accelerator Device May Not Invalidate PASID Supervisor-Privilege Translations
GNR15 No Fix RTTO May Occur at Lower Link Speed And Reduce Link Width
GNR16 No Fix PCIe Root Port May Fail to Set The RICFM Bit
GNR17 No Fix Intel® IAA Drop Initial Bits Field in AECS May Not Clear When Drop Initial Bits field is 8 Times Source1 Size
GNR18 No Fix Intel IAA/Intel® DSA May Not Report Interrupt PASID Check Failure Error
GNR19 No Fix The Processor May Drop Noncompliant Posted Peer-to-Peer Transactions
GNR20 No Fix Single Step on Branches Might be Missed When VMM Enables Notification On VM Exit
GNR21 No Fix Remapping Hardware May Not Generate a Page Request Group Response Message While Operating in Legacy Mode or Abort DMA Mode
GNR22 Fixed Remapping Hardware May Abort ZLR to Second-Stage Write Only Pages
GNR23 No Fix Remapping Hardware Does Not Perform Reserved (0) Check in Page Response Descriptor
GNR24 Fixed The Time-Stamp Counter May Report an Incorrect Value
GNR25 No Fix CHA UCNA Errors May Be Incorrectly Controlled by MC7_​CTL Enable Bits
GNR26 No Fix Errors May Occur During TOR CrashDump
GNR27 No Fix TOR_​TIMEOUT May Occur Due to RID Values Outside Range Limit
GNR28 N/A Removed
GNR29 No Fix RETRY_​RD_​ERR_​LOG_​MISC.DDR5_​9x4_​half_​device Bit May Be Incorrect
GNR30 No Fix Intel DSA Memory Write with Incorrect Parity May Result in a System Crash
GNR31 No Fix Intel IAA Expand Operation With PRLE Format Input May Return an Error
GNR32 No Fix RDT MBA Cannot Throttle to Minimum Bandwidth
GNR33 No Fix APPP Error May Be Logged Incorrectly in Machine Check Status Register ADDRV
GNR34 No Fix Intel DSA Does Not Report IDPT Entry in SWERROR or Event Log
GNR35 No Fix UBOXERRMISC_​CFG Registers Do Not Log Errors
GNR36 No Fix Intel DSA and Intel IAA Devices May Cause a Machine Check
GNR37 No Fix Intel DSA and Intel IAA Devices May Cause Invalid Translation Caching
GNR38 No Fix Incorrect FROM_​IP Value For an RTM Abort in BTM or BTS May be Observed
GNR39 No Fix Intel® PT Trace May Contain Incorrect Data When Configured With Single Range Output Larger Than 4KB
GNR40 No Fix S and AR Bits of MCi_​STATUS Registers Unexpectedly Cleared by UCNA or CE
GNR41 No Fix Completion Timeout When Using Link IDE And Selective IDE
GNR42 No Fix Mirrored 128b ECC Mode May Not Log DRAM Address With Poison
GNR43 No Fix Processor May Hang When AMX_​OPS_​RETIRED PMON Event is Counted
GNR44 Fixed Some PECI Wire Commands May Not be Serviced
GNR45 No Fix System Hang When Page Request Message Issued From Discrete Device
GNR46 No Fix PLR and PEM PCS_​PSTATE Not Asserted or Incremented
GNR47 Fixed Invalid BMC Frame Data During Reset Cycling
GNR48 No Fix Unable to Access 32-bit Address MMIO Registers Out of Band
GNR49 No Fix PCIe TLP May be Lost After Link Down Event
GNR50 No Fix Intel IAA Decompression Logic May Return Incorrect Values in Completion Record When All Source 1 Data is Dropped
GNR51 No Fix Remapping Hardware with Major Version Number 6 Incorrectly Advertises the ESRTPS Support
GNR52 No Fix Reserved(0) Check For a PASID Table Entry May Not Happen For a DMA Request
GNR53 No Fix Remapping Hardware Will Not Report The PASID Value For RTA.2 Faults in Modes Other Than Scalable Mode
GNR54 No Fix Remapping Hardware Does Not Perform a Reserved(0) Check in Interrupt Remap Table Entry
GNR55 No Fix Unexpected Recoveries With ASPM L1 in CXL Endpoint
GNR56 No Fix PCIe Infinite Recovery Loop During Link Equalization
GNR57 No Fix Incorrect B2CMI MCi_​STATUS_​SHADOW.CORRCOUNT Value
GNR58 Fixed Boot Failure During BIOS Update With Missing CHA RTID Table
GNR59 Fixed Incorrect RAPL PPL1 Limit
GNR60 No Fix Incorrect Values For CHA ALL0 And CHA ALL1
GNR61 Fixed Internal Timer Machine Check Error May Cause System Hang
GNR62 Fixed REP SCASB or REP CMPSB Instructions May Return Incorrect Results
GNR63 Fixed System Hang During Sideband And Traffic To B2CXL
GNR64 No Fix SYS_​RESET_​N Trigger May Lead to MCA_​GPSB_​TIMEOUT
GNR65 Fixed Intel® OOBM Services Module RDIAMSREX Command Unable to Access MSRs Under IERR Conditions
GNR66 No Fix CXL Mode Incorrectly Identifies ASPM L1 Aborts
GNR67 No Fix PCIe Root Port May Not Reduce Link Width
GNR68 No Fix Intel® PT Incorrect CR3-Filtering
GNR69 No Fix Address May Not be Logged For a UCR Error Detected in The MLC
GNR70 No Fix Incorrect Last Branch From Value in BTS Branch Record During a Task Switch
GNR71 No Fix VMREAD/VMWRITE Instructions May Not Fail When Accessing an Unsupported Field in VMCS
GNR72 No Fix PMON Unit Control Unfreeze May Cause COUNTERVALUE Registers to Overcount
GNR73 Fixed HPR_​CAUSE0 Not Cleared With a Global Reset or Wake Event
GNR74 No Fix Performance Monitoring Event MEMORY_​ACTIVITY.STALLS_​L2_​MISS May Undercount
GNR75 Fixed System Reset May Incorrectly Overwrite Previous Crashlog
GNR76 No Fix Instruction Timeout VM Exit Will Not Set Guest RFLAGS.RF During #UD

Specification Changes

Number Specification Changes
SChx None for this revision of this specification update.

Specification Clarifications

No. Specification Clarifications
SClx None for this revision of this specification update.

Documentation Changes

No. Documentation Changes
DChx None for this revision of the specification update.