DPC Latency Problems

[Matias]

When the computer has been powered on for a while (when I leave it on for the night) I get crackling sounds when playing music. A restart solves the problem (DPC goes normal). I have tried disabling almost all devices. Is RATTV3 the way for finding the problem? Had some problem using that tool.

 

[Techguyjamie]

It is possible that your sound card is giving way...your jack plug for your speakers might be touching a bit of metal inside the card.It may need replacing

 

[Matias]

Shouldn't the problem go away then if I disable the sound card?

 

[Techguyjamie]

yeah but so would all your other sound...have you got a spare?

 

[Matias]

What I mean is: I've tried disabling the sound card in Device Manager without the DPC going normal. The problem is starting to get annoying. I will try googling some more for a solution.

 

[Zathras]

I know almost nothing about latency issues, BUT I recall some persons with the Intel i5 and i7 CPUs reporting that they have DPC latency problems unless they disable the C3/C6/C7 CPU power states in the BIOS. What's your CPU & motherboard?

 

[Matias]

Mainboard : Shuttle FP35
Processor : Intel Core 2 Duo E6850

Mainboard:

PC Wizard 2010 Version 1.93
------------------------------------------------------------------------------------------

Owner: Admin
User: Admin
Operating System: Windows 7 Ultimate Professional 6.01.7600 
Report Date: mandag 03 mai 2010 at 23:18

------------------------------------------------------------------------------------------


<<< Mainboard >>>

  > Manufacturer : Shuttle Inc

    >> General Information
      Product : SP35
      Version : V10
      Serial Number : 0
      Unique ID : 01020907-03010106-08070605-04030201
      SKU : Unspecified
      Family : Unspecified
      Start mode : Power Switch

    >> Chassis Information
      Intrusion detected : No

  > Mainboard : Shuttle FP35

    >> General Information
      Manufacturer : Shuttle Inc (Shuttle)
      Product : FP35
      Version : V10
      Serial Number : 0
      Support MP : Yes, 2 CPU(s)
      Version MPS : 1.4

    >> Chassis Information
      Manufacturer : Shuttle Inc
      Type : Desktop
      Version : G5
      Serial Number : Unspecified
      Asset : Unspecified

    >> OEM Support SLIC
      SLIC : Yes
      SLP OA : v2.0

    >> Sensor Information
      Hardware Monitoring : ITE IT8718F

    >> On-Board Device Information
      Embedded Controller : Yes

    >> Slots Information
      Slot PCI-X : Available (32-bit) 5.0v
      Slot PCI-X : Available (32-bit) 5.0v

    >> External Connectors
      Serial 16450 Compatible : DB-9 male
      Serial 16450 Compatible : DB-9 male
      Parallel ECP/EPP : DB25 female
      Keyboard : PS/2
      Mouse : PS/2

    >> Internal Connectors
      PRIMARY IDE : On Board IDE
      SECONDARY IDE : On Board IDE
      FDD : On Board Floppy
      COM1 : 9 Pin Dual Inline (pin 10 cut)
      COM2 : 9 Pin Dual Inline (pin 10 cut)
      LPT1 : DB25 female
      Keyboard : PS/2
      PS/2 Mouse : PS/2

    >> EEPROM Information
      Type : EEPROM Specific
      Address : 0x57

  > Bios : Phoenix Technologies, LTD

    >> General Information
      Manufacturer : Phoenix Technologies, LTD
      Version : 6.00 PG
      Date : 07/03/2009  (mm/dd/yyyy)
      Address : 1024 KB
      Copyright : Copyright (C) 2007, Phoenix Technologies, LTD
      Motherboard ID : 07/03/2009-Bearlake-6A79OH2AC-00
      OEM Signature : (SP35S110) Intel P35 Express Chipset + ICH9R
      DMI Version : 2.5

    >> Characteristics
      Flashable : Yes
      Socketed : Yes

    >> Functionality
      APM : Yes
      ACPI : Yes
      ESCD : No
      PnP : Yes
      PCI : Yes
      ISA : Yes
      AGP : No
      USB : Yes
      PCMCIA : No
      Smart Battery : No

    >> Boot Information
      Selectable Boot : Yes
      CD-ROM Boot : Yes
      PC Card (PCMCIA) Boot : No
      I20 Boot : No
      LS-120 Boot : Yes
      1394 Boot : No
      ATAPI ZIP Boot : Yes
      Network Boot : No

  > Chipset : Intel G31/G33/G35

    >> General Information
      NorthBridge : Intel G31/G33/G35
      SouthBridge : 82801IR (ICH9R) LPC Interface Controller

    >> NorthBridge Information
      Architecture : Direct Media Interface (DMI)
      Manufacturer : Intel (Holco Ent)
      Codename : Bearlake
      Revision : A2
      Bus Speed : 332.5 MHz
      FSB Frequency : 1330 MHz (QDR)

    >> Memory Information
      Type : DDR2-SDRAM PC2-6400
      Frequency : 399 MHz
      DRAM/FSB Ratio : 6/5
      Supported Channels : Dual  (128-bit)
      Activated Channels : Single
      ECC Diagnostic : Nei
      CAS Latency (tCL) : 5 clocks
      RAS to CAS (tRCD) : 5 clocks
      RAS Precharge (tRP) : 5 clocks
      Cycle Time (tRAS) : 18 clocks
      Command Rate : 1 T

    >> Physical Capabilities
      DDR3-SDRAM Support : No
      Turbo Memory : No
      FlexMemory : Yes   -   Disabled
      IME Support : No
      AMT Support : No
      TPM Support : No
      VT Support : No
      TXT Support : No

    >> PCI-Express Information
      Number of ports : 3  -  (x16, x1, x1)

    >> Video Information
      Integrated Controller : No
      Enabled : No

    >> Functionality
      SATA AHCI Enabled : Yes
      RAID 0/1/10 Enabled : Yes
      RAID 5 Enabled : No
      PCI Express x1 Enabled : Yes
      Intel AMT  : Yes
      Intel QST  : No
      Intel IPT : No
      SPI Interface : Yes

    >> Device Capabilities (PCI)
      I/O Access : No
      Memory Access : Yes
      Bus Master Capable : Yes
      Special Cycle Recognition : No
      Memory Write & Invalidate : No
      VGA Palette Snoop : No
      Parity Error Response : No
      Cycle Wait : No
      System Error Line : No
      Fast Back-to-Back : No
      Detects Parity Errors : No
      User Defined Format : No
      PCI 66Mhz Bus Support : No
      New Capability List : Yes
      PCI Support : Vendor-Dependant

  > Physical Memory : 2048 MB DDR2-SDRAM

    >> General Information
      A0 (RAS 0, RAS 1) : 1024 (Double Bank)
      A1 (RAS 2, RAS 3) : 1024 (Double Bank)
      A2 : Empty
      A3 : Empty

    >> Information SPD EEPROM (A0)
      Manufacturer : Mushkin
      Part Number : 991533 (996533)
      Serial Number : Unspecified
      Type : DDR2-SDRAM PC2-6400 (399 MHz)  -  [DDR2-800]
      Format : Regular UDIMM (133,35 x 3)
      Size : 1024 MB (2 ranks, 4 banks)
      Module Buffered : No
      Module Registered : No
      Module SLi Ready (EPP) : Yes
      Width : 64-bit
      Error Correction Capability (ECC) : No
      Max. Burst Length : 8
      Refresh : Reduced (.5x)7.8 µs, Self Refresh
      Voltage : SSTL 1.8v
      Prefetch Buffer : 4-bit
      Manufacture : Week 10 of 2007
      Supported Frequencies : 266 MHz, 400 MHz
      CAS Latency (tCL) : 4 clocks @266 MHz, 5 clocks @400 MHz
      RAS to CAS (tRCD) : 4 clocks @266 MHz, 5 clocks @400 MHz
      RAS Precharge (tRP) : 4 clocks @266 MHz, 5 clocks @400 MHz
      Cycle Time (tRAS) : 12 clocks @266 MHz, 18 clocks @400 MHz
      Min TRC : 16 clocks @266 MHz, 23 clocks @400 MHz
      
      EPP Profile #1 : Abbreviated Performance
      Voltage Level : 2.1V
      Address Command Rate : 2T
      Cycle Time : 2.5ns @400 MHz
      CAS Latency (tCL) : 4 clocks
      RAS to CAS (tRCD) : 5 clocks
      RAS Precharge (tRP) : 4 clocks
      Cycle Time (tRAS) : 11 clocks

    >> Information SPD EEPROM (A1)
      Manufacturer : Mushkin
      Part Number : 991533 (996533)
      Serial Number : Unspecified
      Type : DDR2-SDRAM PC2-6400 (399 MHz)  -  [DDR2-800]
      Format : Regular UDIMM (133,35 x 3)
      Size : 1024 MB (2 ranks, 4 banks)
      Module Buffered : No
      Module Registered : No
      Module SLi Ready (EPP) : Yes
      Width : 64-bit
      Error Correction Capability (ECC) : No
      Max. Burst Length : 8
      Refresh : Reduced (.5x)7.8 µs, Self Refresh
      Voltage : SSTL 1.8v
      Prefetch Buffer : 4-bit
      Manufacture : Week 10 of 2007
      Supported Frequencies : 266 MHz, 400 MHz
      CAS Latency (tCL) : 4 clocks @266 MHz, 5 clocks @400 MHz
      RAS to CAS (tRCD) : 4 clocks @266 MHz, 5 clocks @400 MHz
      RAS Precharge (tRP) : 4 clocks @266 MHz, 5 clocks @400 MHz
      Cycle Time (tRAS) : 12 clocks @266 MHz, 18 clocks @400 MHz
      Min TRC : 16 clocks @266 MHz, 23 clocks @400 MHz
      
      EPP Profile #1 : Abbreviated Performance
      Voltage Level : 2.1V
      Address Command Rate : 2T
      Cycle Time : 2.5ns @400 MHz
      CAS Latency (tCL) : 4 clocks
      RAS to CAS (tRCD) : 5 clocks
      RAS Precharge (tRP) : 4 clocks
      Cycle Time (tRAS) : 11 clocks

    >> Memory Controller Information
      Memory Controller : DIMM
      Number of connectors : 4
      Max. Module Size : 2048 MB
      Max. Memory Size : 8192 MB
      Supported Speed : Unspecified
      Supported Voltages : 5v
      Error Detection Method : 8-bit Parity
      Error Correction Capability : None
      Current/Supported Interleave : 1-way/1-way

  > LPC bus : Yes

    >> Bus Information
      Type : ISA  -  LPC
      Device : 82801IR (ICH9R) LPC Interface Controller
      Revision : 02
      Number of ISA Connectors : 0

    >> Device Capabilities (PCI)
      I/O Access : Yes
      Memory Access : Yes
      Bus Master Capable : Yes
      Special Cycle Recognition : No
      Memory Write & Invalidate : No
      VGA Palette Snoop : No
      Parity Error Response : No
      Cycle Wait : No
      System Error Line : Yes
      Fast Back-to-Back : No
      Detects Parity Errors : No
      User Defined Format : No
      PCI 66Mhz Bus Support : No
      New Capability List : Yes
      PCI Support : Vendor-Dependant

  > PCI Bus : No

  > Bus PCI-Express : Yes

    >> PCI-Express Information
      Number of connectors : 1
      PCI-Express Base : 0xE0000000

    >> Bus PCI-Express
      Device : G35/G33/G31/P35/P31 Chipset PCIe Port 1
      Version : 1.0
      Port : 2
      Physical Slot : #4
      Slot Populated : Yes
      Link Width : x16   (max. x16)
      Link Speed : 2.5 GB/s

    >> Bus PCI-Express
      Device : 82801IB/IR/IH (ICH9 Family) PCIe Port 1
      Version : 1.0
      Port : 1
      Physical Slot : #2
      Slot Populated : Yes
      Link Width : x1   (max. x1)
      Link Speed : 2.5 GB/s

    >> Bus PCI-Express
      Device : 82801IB/IR/IH (ICH9 Family) PCIe Port 2
      Version : 1.0
      Port : 2
      Physical Slot : #2
      Slot Populated : Yes
      Link Width : x1   (max. x1)
      Link Speed : 2.5 GB/s

    >> Bus PCI-Express
      Device : G80 [GeForce 8800 GTS]
      Version : 1.0
      Port : 0
      Link Width : x16   (max. x16)
      Link Speed : 2.5 GB/s

  > USB Bus : Yes

    >> Device Information
      Device : 82801IB/IR/IH (ICH9 Family) USB UHCI Controller #4
      Version : 1.0
      Interface : UHCI
      Frequency : 48 MHz

    >> Device Information
      Device : 82801IB/IR/IH (ICH9 Family) USB UHCI Controller #5
      Version : 1.0
      Interface : UHCI
      Frequency : 48 MHz

    >> Device Information
      Device : 82801IB/IR/IH (ICH9 Family) USB UHCI Controller #6
      Version : 1.0
      Interface : UHCI
      Frequency : 48 MHz

    >> Device Information
      Device : 82801IB/IR/IH (ICH9 Family) USB EHCI Controller #2
      Version : 2.0
      Interface : EHCI

    >> Device Information
      Device : 82801IB/IR/IH (ICH9 Family) USB UHCI Controller #1
      Version : 1.0
      Interface : UHCI
      Frequency : 48 MHz

    >> Device Information
      Device : 82801IB/IR/IH (ICH9 Family) USB UHCI Controller #2
      Version : 1.0
      Interface : UHCI
      Frequency : 48 MHz

    >> Device Information
      Device : 82801IB/IR/IH (ICH9 Family) USB UHCI Controller #3
      Version : 1.0
      Interface : UHCI
      Frequency : 48 MHz

    >> Device Information
      Device : 82801IB/IR/IH (ICH9 Family) USB EHCI Controller #1
      Version : 2.0
      Interface : EHCI

  > SMBus/i2c Bus : Yes

    >> General Information
      Device : 82801IB/IR/IH (ICH9 Family) SMBus Controller
      Revision : 2
      Frequency : 16 KHz
      Address : 0x500
      SBI Protocol Enabled : No

    >> Device Capabilities (PCI)
      I/O Access : Yes
      Memory Access : Yes
      Bus Master Capable : No
      Special Cycle Recognition : No
      Memory Write & Invalidate : No
      VGA Palette Snoop : No
      Parity Error Response : No
      Cycle Wait : No
      System Error Line : No
      Fast Back-to-Back : No
      Detects Parity Errors : No
      User Defined Format : No
      PCI 66Mhz Bus Support : No
      New Capability List : No
      PCI Support : Slot

  > Bus HyperTransport : No

  > Bus QPI : No

  > Bus CardBus : No

  > Bus FireWire : Yes

    >> Bus Information
      Device : TSB43AB22 1394a-2000 OHCI PHY/Link-Layer Controller

------------------------------------------------------------------------------------------
***** End of report *****

CPU:

PC Wizard 2010 Version 1.93
------------------------------------------------------------------------------------------

Owner: Admin
User: Admin
Operating System: Windows 7 Ultimate Professional 6.01.7600 
Report Date: mandag 03 mai 2010 at 23:19

------------------------------------------------------------------------------------------


<<< Processor >>>

  > Processor : Intel Core 2 Duo E6850

    >> General Information
      Type : Intel Core 2 Duo
      Internal Specification : Intel(R) Core(TM)2 Duo CPU     E6850  @ 3.00GHz
      Model Number : E6850
      Codename : Conroe
      Revision : G0
      Technology : 0.065µ
      CPU ID : 6.F.B
      CPU IDEx : 6.F.B
      Microcode : MU06FBB6

    >> Instructions
      IA-64 Technology : No
      Intel64 (EM64T) : Yes
      AVX : No
      FPU128 : No
      SSE5 : No
      SSE4a : No
      SSE4.2 : No
      SSE4.1 : No
      S-SSE3 : Yes
      SSE3 : Yes
      SSE2 : Yes
      SSE : Yes
      Extended 3DNow! Technology : No
      3DNow! Technology : No
      3DNOW Prefetch : No
      3DNow! Pro Technology : Yes
      AMD MMX Technology : No
      MMX Technology : Yes
      Cyrix MMX Technology : No
      FMA : No
      AES : No
      OSXSAVE : No
      MOVBE : No
      PCLMULQDQ : No
      CLF - Cache Line Flush : Yes
      CX8 - CMPXCHG8B : Yes
      CX16 - CMPXCHG16B : Yes
      CMOV - Conditionnal Move Inst. : Yes
      MON - Monitor/Mwait : Yes
      POPCNT : No
      RDTSCP : No
      SEP - Fast System Call : Yes

    >> Miscellaneous
      XD - No-execute Page : Yes
      VT-x - Virtualization : Yes
      TXT - Trusted Execution Technology : Yes
      SVM - Secure Virtual Machine : No
      FPU - Co-processor Built-in : Yes
      FXSR - Fast Float Save & Restore : Yes
      xTPR - Send Task Priority : Yes
      DAZ - Denormals Are Zero : Yes
      FFXSR : No
      LAHFSAHF : Yes
      CMPLEGACY : No
      ALTMOVCR8 : No
      ExtApicSpace : No
      3DNow! Technology : No
      PBE - Pend. Brk. EN. : No
      LAHF - LAHF/SAHF Inst. : No
      ABM : No
      MASSE - Misaligned SSE : No
      OSVW - OS Visible Workaround : No
      IBS : No
      P1GB - 1GB Page Size : No
      SKINIT, STGI, DEV : No
      WDT - Watchdog Timer : No

    >> Features
      x2APIC : No
      APIC - Local APIC Built-in : Yes
      VME - Virtual Mode Ext. : Yes
      DE - Debugging Extension : Yes
      PSE - Page Size Extension : Yes
      TSC - Time Stamp Counter : Yes
      MSR - Model Specific Registers : Yes
      PAE - Physical Address Extension : Yes
      MCE - Machine Check Exception : Yes
      MTRR - Memory Type Range Reg. : Yes
      PGE - Page Global Enable : Yes
      MCA - Machine Check Architecture : Yes
      PAT - Page Attribute Table : Yes
      PSE36 - 36-bit Page Size Extension : Yes
      PSN - Unique Serial Number : No
      DS - Debug Trace & EMON Store : Yes
      SS - Self Snoop : Yes
      ACPI - Software Clock Control : Yes
      TM - Thermal Monitor : Yes
      TM2 - Thermal Monitor 2 : Yes
      EST - Enhanced SpeedStep Technology : Yes
      HTT - Hyper-Threading : Yes
      SBF - Signal Break on FERR : Yes
      DSCPL - CPL qualified Debug Store : Yes
      CID - Context ID : No
      LT - LaGrande Technology : Yes
      PDCM : Yes
      DCA - Direct Cache Access : No
      EPS - Enhanced PowerSaver : No

    >> Features Multi-Core
      Physical Processor #1 (Core #1) : Apic ID 0
      Physical Processor #1 (Core #2) : Apic ID 1

    >> Power Status
      Turbo Boost : No
      Digital Thermometer : Yes
      Operating Point Protection : No
      Dynamic FSB : Yes
      Dynamic Acceleration : No
      Performance Energy Bias : No

    >> Addressing Information
      Physical Addressing max. : 36-bit
      Linear Addressing max. : 48-bit

    >> Advanced Settings
      In Order Queue Depth : 8
      Low Power Mode : No

    >> Mainboard Upgradeability
      Socket/Slot : Socket 775
      Upgrade interface : ZIF Socket
      Supported Speed : 4000 MHz (or more)
      Supported Voltage : 1.3V

  > Frequency : 3000 MHz

    >> General Information
      Real Frequency : 1994.91 MHz
      Multiplier : 6x
      Low/High Multiplier : 6x / 9x
      Multiplier Locked : Yes
      Marketing Frequency : 3000.06 MHz

    >> Front Side Bus Information
      Bus Speed : 332.5 MHz
      FSB Frequency : 1329.9 MHz (QDR)

    >> Initial Frequencies
      Frequency : 3000 MHz
      Bus Speed : 333.34 MHz (QDR)
      Multiplier : 9x

    >> Frequency Control
      Core #1 : 1994.92 MHz
      Core #2 : 1995.05 MHz

    >> Control Clock Frequency
      Enhanced SpeedStep (EIST) : Yes   -   Enabled
      C1E - Enhanced Halt Mode : No
      Dynamic FSB : Yes   -   Disabled
      Dynamic Acceleration (IDA) : No

    >> Thermal Information
      Thermal Design Power : 65 W
      Core Power : 43.23 W (estimated)
      Thermal control TM1 : Yes   -   Enabled
      Thermal control TM2 : Yes   -   Enabled
      Thermal Control Circuit : Yes
      Digital Thermal Sensor : Yes
      Clock Modulation (ODCM) Enabled : No

    >> Processor Performance Information

  > Number of Core : 2

    >> General Information
      Number of Core : 2  (max. 2)
      Number of Core Enabled : 2
      Number of Threads : 2
      Number of Thread per Core : 1  (max.2)

  > Support : Socket 775 LGA

  > Cache L1 : 2 x 64 KB

    >> General Information
      Type : Synchronous
      Write Mode : Write-Back
      Place : On Chip

    >> Cache Information
      Data Cache : 2 x 32 KB (8-way, 64 bytes line size)
      Code Cache : 2 x 32 KB (8-way, 64 bytes line size)

    >> Cache Parameters
      Type : Data Cache
      Ways of associativity : 8
      Fully Associative : No
      Self Intializing : Yes
      System Coherency Line Size : 64
      Physical Line partitions : 1
      Number of threads sharing : 1
      Number of processor cores : 2
      Number of Sets : 64

    >> Cache Prefetcher Optimization
      Adjacent Cache Line : Yes (128-bit)
      DPL L2 Cache : Yes
      DCU L1 Cache : Yes
      IP L1 Cache : Yes

  > Cache L2 : 4096 KB

    >> General Information
      Type : Synchronous
      Write Mode : Write-Back
      Place : On Chip
      Multiplier : 1/1x   (1995 MHz)

    >> Cache Information
      Associativity : 16-way
      Line Size : 64 bytes
      Bus : 256-bit
      Prefetch Logic : Yes

    >> Cache Prefetcher Optimization
      Adjacent Cache Line : Yes (128-bit)
      DPL L2 Cache : Yes
      DCU L1 Cache : Yes
      IP L1 Cache : Yes

  > Voltage VID : 1.300 V

    >> General Information CPU
      Voltage : 1.151 V
      MaxVID : 1.351 V
      MinVID : 1.351 V

  > FPU Coprocessor : Present

    >> General Information
      Integrated : Yes
      Model : Compatible Intel

  > Core 1 Activity : 12%

  > Core 2 Activity : 13%

------------------------------------------------------------------------------------------
***** End of report *****

 

[Matias]

Any advices, or do I have to do a reformat? The problem goes away when restarting, and gradually the DPC goes haywire.