Summary Tables of Changes
12
Specification Update
BG42
X
X
No Fix
Performance Monitor Counters May Count Incorrectly
BG43
X
X
No Fix
Performance Monitor Event Offcore_response_0 (B7H) Does
Not Count NT Stores to Local DRAM Correctly
BG44
X
X
No Fix
Back-to-Back Uncorrected Machine Check Errors May
Overwrite IA32_MC3_STATUS.MSCOD
BG45
X
X
No Fix
Corrected Errors with a Yellow Error Indication May Be
Overwritten by Other Corrected Errors
BG46
X
X
No Fix
Performance Monitor Events DCACHE_CACHE_LD and
DCACHE_CACHE_ST May Overcount
BG47
X
X
No Fix
Performance Monitor Events INSTR_RETIRED and
MEM_INST_RETIRED May Count Inaccurately
BG48
X
X
No Fix
A Page Fault May Not Be Generated When the PS Bit Is Set
to “1” in a PML4E or PDPTE
BG49
X
X
No Fix
BIST Results May Be Additionally Reported after a
GETSEC[WAKEUP] or INIT-SIPI Sequence
BG50
X
X
No Fix
Pending x87 FPU Exceptions (#MF) May Be Signaled Earlier
Than Expected
BG51
X
X
No Fix
Multiple Performance Monitor Interrupts are Possible on
Overflow of IA32_FIXED_CTR2
BG52
X
X
No Fix
LBRs May Not be Initialized During Power-On Reset of the
Processor
BG53
X
X
No Fix
LBR, BTM or BTS Records May Have Incorrect Branch From
Information After an Enhanced Intel SpeedStep®
Technology Transition, T-states, C1E, or Adaptive Thermal
Throttling
BG54
X
X
No Fix
DPRSLPVR Signal May Be Incorrectly Asserted on Transition
between Low Power C-states
BG55
X
X
No Fix
Performance Monitoring Events STORE_BLOCKS.NOT_STA
and STORE_BLOCKS.STA May Not Count Events Correctly
BG56
X
X
No Fix
Storage of PEBS Record Delayed Following Execution of MOV
SS or STI
BG57
X
X
No Fix
Performance Monitoring Event FP_MMX_TRANS_TO_MMX
May Not Count Some Transitions
BG58
X
X
No Fix
LER MSRs May Be Unreliable
BG59
X
X
No Fix
MCi_Status Overflow Bit May Be Incorrectly Set on a Single
Instance of a DTLB Error
BG60
X
X
No Fix
Debug Exception Flags DR6.B0-B3 Flags May Be Incorrect
for Disabled Breakpoints
BG61
X
X
No Fix
Critical ISOCH Traffic May Cause Unpredictable System
Behavior When Write Major Mode Enabled
BG62
X
X
No Fix
A String Instruction That Re-maps a Page May Encounter an
Unexpected Page Fault
Errata (Sheet 3 of 4)
Number
Steppings
Status
ERRATA
C-2
K-0
