Windows 7: Cracking / Popping Sound

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CONCLUSION
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Your system appears to be having trouble handling real-time audio and other tasks. You are likely to experience buffer underruns appearing as drop outs, clicks or pops. One or more DPC routines that belong to a driver running in your system appear to be executing for too long. Also one or more ISR routines that belong to a driver running in your system appear to be executing for too long. One problem may be related to power management, disable CPU throttling settings in Control Panel and BIOS setup. Check for BIOS updates.
LatencyMon has been analyzing your system for 0:10:29 (h:mm:ss) on all processors.


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SYSTEM INFORMATION
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Computer name: TREOR
OS version: Windows 7 , 6.1, build: 7600 (x64)
Hardware: ASRock, Z77 Extreme4
CPU: GenuineIntel Intel(R) Core(TM) i5-3570K CPU @ 3.40GHz
Logical processors: 4
Processor groups: 1
RAM: 8145 MB total


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CPU SPEED
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Reported CPU speed: 3400,0 MHz
Measured CPU speed: 2183,0 MHz (approx.)

Note: reported execution times may be calculated based on a fixed reported CPU speed. Disable variable speed settings like Intel Speed Step and AMD Cool N Quiet in the BIOS setup for more accurate results.


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MEASURED INTERRUPT TO USER PROCESS LATENCIES
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The interrupt to process latency reflects the measured interval that a usermode process needed to respond to a hardware request from the moment the interrupt service routine started execution. This includes the scheduling and execution of a DPC routine, the signaling of an event and the waking up of a usermode thread from an idle wait state in response to that event.

Highest measured interrupt to process latency (µs): 3085,799749
Average measured interrupt to process latency (µs): 1,589813

Highest measured interrupt to DPC latency (µs): 2048,566260
Average measured interrupt to DPC latency (µs): 0,421498


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MEASURED SMI, IPI AND CPU STALLS
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The SMI, IPI and CPU stalls value represents the highest measured interval that a CPU did not respond while having its maskable interrupts disabled.

Highest measured SMI or CPU stall (µs) 0,602342


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REPORTED ISRs
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Interrupt service routines are routines installed by the OS and device drivers that execute in response to a hardware interrupt signal.

Highest ISR routine execution time (µs): 1167,356471
Driver with highest ISR routine execution time: iaStor.sys - Intel Rapid Storage Technology driver - x64, Intel Corporation

Highest reported total ISR routine time (%): 0,027801
Driver with highest ISR total time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

Total time spent in ISRs (%) 0,050324

ISR count (execution time <250 µs): 916868
ISR count (execution time 250-500 µs): 0
ISR count (execution time 500-999 µs): 0
ISR count (execution time 1000-1999 µs): 1
ISR count (execution time 2000-3999 µs): 0
ISR count (execution time >=4000 µs): 0


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REPORTED DPCs
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DPC routines are part of the interrupt servicing dispatch mechanism and disable the possibility for a process to utilize the CPU while it is interrupted until the DPC has finished execution.

Highest DPC routine execution time (µs): 2020,572941
Driver with highest DPC routine execution time: nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 314.07 , NVIDIA Corporation

Highest reported total DPC routine time (%): 0,096543
Driver with highest DPC total execution time: ndis.sys - Sterownik NDIS 6.20, Microsoft Corporation

Total time spent in DPCs (%) 0,293692

DPC count (execution time <250 µs): 4163101
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 85
DPC count (execution time 1000-1999 µs): 1
DPC count (execution time 2000-3999 µs): 1
DPC count (execution time >=4000 µs): 0


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REPORTED HARD PAGEFAULTS
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Hard pagefaults are events that get triggered by making use of virtual memory that is not resident in RAM but backed by a memory mapped file on disk. The process of resolving the hard pagefault requires reading in the memory from disk while the process is interrupted and blocked from execution.

NOTE: some processes were hit by hard pagefaults. If these were programs producing audio, they are likely to interrupt the audio stream resulting in dropouts, clicks and pops. Check the Processes tab to see which programs were hit.

Process with highest pagefault count: cavwp.exe

Total number of hard pagefaults 12635
Hard pagefault count of hardest hit process: 3234
Highest hard pagefault resolution time (µs): 999902,011176
Total time spent in hard pagefaults (%): 0,635346
Number of processes hit: 25


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PER CPU DATA
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CPU 0 Interrupt cycle time (s): 8,554012
CPU 0 ISR highest execution time (µs): 1167,356471
CPU 0 ISR total execution time (s): 1,267928
CPU 0 ISR count: 916869
CPU 0 DPC highest execution time (µs): 2020,572941
CPU 0 DPC total execution time (s): 5,061489
CPU 0 DPC count: 3886591
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CPU 1 Interrupt cycle time (s): 2,131795
CPU 1 ISR highest execution time (µs): 0,0
CPU 1 ISR total execution time (s): 0,0
CPU 1 ISR count: 0
CPU 1 DPC highest execution time (µs): 317,737647
CPU 1 DPC total execution time (s): 1,060189
CPU 1 DPC count: 97355
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CPU 2 Interrupt cycle time (s): 2,666655
CPU 2 ISR highest execution time (µs): 0,0
CPU 2 ISR total execution time (s): 0,0
CPU 2 ISR count: 0
CPU 2 DPC highest execution time (µs): 241,910588
CPU 2 DPC total execution time (s): 0,848419
CPU 2 DPC count: 102381
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CPU 3 Interrupt cycle time (s): 1,904665
CPU 3 ISR highest execution time (µs): 0,0
CPU 3 ISR total execution time (s): 0,0
CPU 3 ISR count: 0
CPU 3 DPC highest execution time (µs): 238,360
CPU 3 DPC total execution time (s): 0,429597
CPU 3 DPC count: 76861
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