Specifications

Summary Tables of Changes
12 Intel
®
Core™2 Extreme Processor X6800 and
Intel
®
Core™2 Duo Desktop Processor E6000 and E4000 Sequence
Specification Update
NO B1 B2 L2 M0 G0 Plan ERRATA
AI31 X X X X Fixed
Performance Monitoring Events for Retired Loads (CBH) and
Instructions Retired (C0H) May Not Be Accurate
AI32 X X X X X No Fix
Upper 32 bits of 'From' Address Reported through BTMs or
BTSs May be Incorrect
AI33 X X X Fixed
Unsynchronized Cross-Modifying Code Operations Can Cause
Unexpected Instruction Execution Results
AI34 X X X X X No Fix
MSRs Actual Frequency Clock Count (IA32_APERF) or Maximum
Frequency Clock Count (IA32_MPERF) May Contain Incorrect
Data after a Machine Check Exception (MCE)
AI35 X X X X X No Fix
Incorrect Address Computed For Last Byte of FXSAVE/FXRSTOR
Image Leads to Partial Memory Update
AI36 X X X X X No Fix Split Locked Stores May not Trigger the Monitoring Hardware
AI37 X X Fixed
REP CMPS/SCAS Operations May Terminate Early in 64-bit
Mode when RCX >= 0X100000000
AI38 X X X X Fixed
FXSAVE/FXRSTOR Instructions which Store to the End of the
Segment and Cause a Wrap to a Misaligned Base Address
(Alignment <= 0x10h) May Cause FPU Instruction or Operand
Pointer Corruption
AI39 X X X X Fixed
Cache Data Access Request from One Core Hitting a Modified
Line in the L1 Data Cache of the Other Core May Cause
Unpredictable System Behavior
AI40 X X X X Fixed
PREFETCHh Instruction Execution under Some Conditions May
Lead to Processor Livelock
AI41 X X X X Fixed
PREFETCHh Instructions May Not be Executed when Alignment
Check (AC) is Enabled
AI42 X X X X Fixed
Upper 32 Bits of the FPU Data (Operand) Pointer in the FXSAVE
Memory Image May Be Unexpectedly All 1's after FXSAVE
AI43 X X X Fixed
Concurrent Multi-processor Writes to Non-dirty Page May
Result in Unpredictable Behavior
AI44 X X X X Fixed
Performance Monitor IDLE_DURING_DIV (18h) Count May Not
be Accurate
AI45 X X X X X No Fix
Values for LBR/BTS/BTM will be Incorrect after an Exit from
SMM
AI46 X X X X X No Fix Shutdown Condition May Disable Non-Bootstrap Processors
AI47 X X Fixed
SYSCALL Immediately after Changing EFLAGS.TF May Not
Behave According to the New EFLAGS.TF
AI48 X X X X X No Fix
Code Segment Limit/Canonical Faults on RSM May be Serviced
before Higher Priority Interrupts/Exceptions
AI49 X X X X X No Fix
VM Bit is Cleared on Second Fault Handled by Task Switch from
Virtual-8086 (VM86)
AI50 X X X X Fixed IA32_FMASK is Reset during an INIT
AI51 X X X X X No Fix
An Enabled Debug Breakpoint or Single Step Trap May Be
Taken after MOV SS/POP SS Instruction if it is Followed by an
Instruction That Signals a Floating Point Exception