ACPI error during boot - does it need fixing ?

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Hi!
  On my new system with Gigabyte G41M-ES2H mobo and Intel Core Quad Q8300 CPU,
there are the following errors reported on boot:

ACPI: SSDT 00000000cdcedb10 0022A (v01  PmRef  Cpu0Ist 00003000 INTL 20040311)
Marking TSC unstable due to TSC halts in idle
Switching to clocksource hpet
processor LNXCPU:00: registered as cooling_device0
ACPI: SSDT 00000000cdcedfd0 00152 (v01  PmRef  Cpu1Ist 00003000 INTL 20040311)
ACPI Error (psparse-0537): Method parse/execution failed [\_PR_.CPU1._PDC] (Node ffff88012f815a00), AE_ALREADY_EXISTS
ACPI: Marking method _PDC as Serialized because of AE_ALREADY_EXISTS error
processor LNXCPU:01: registered as cooling_device1
ACPI: SSDT 00000000cdcee130 00152 (v01  PmRef  Cpu2Ist 00003000 INTL 20040311)
ACPI Error (psparse-0537): Method parse/execution failed [\_PR_.CPU2._PDC] (Node ffff88012f815a80), AE_ALREADY_EXISTS
ACPI: Marking method _PDC as Serialized because of AE_ALREADY_EXISTS error
processor LNXCPU:02: registered as cooling_device2
ACPI: SSDT 00000000cdcee290 00152 (v01  PmRef  Cpu3Ist 00003000 INTL 20040311)
ACPI Error (psparse-0537): Method parse/execution failed [\_PR_.CPU3._PDC] (Node ffff88012f815b00), AE_ALREADY_EXISTS
ACPI: Marking method _PDC as Serialized because of AE_ALREADY_EXISTS error
processor LNXCPU:03: registered as cooling_device3

  Is this error just cosmetic, or is it worth fixing ? There is no BIOS update
for this motherboard yet. Are the SSDT tables replaceable the same way as DSDT
is ? 

  With regards, Pavel
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