annoying unknown sound

Sep 13, 2018
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Hey guys I'm having a serious issue with my pc. It started out as occasional pops in audio while playing games a month ago, and then it turned out to be a cracking buzzing unbearable sound and it happens only when playing games (absent when watching video playing music while on photoshop or some other program).
The games run buttery smooth and I experience no lags or fps drops.
The sound is not from any hardwares inside my pc.
The cracking sound exists as long as any game is running (it disappears when game is minimized, nd the game audio is clear) and it doesn't matter whatever headphones or speakers I connect to.
During a fresh boot up i could play for maybe 15 to 20 minutes or less without this noise slowly increasing the more I play.
And while playing this buzzing cause to disconnect and connect my headphones or external speakers connected causing the realtek notification to pop up
I thought it was from the windows 10 anniversary update but I did a clean install of windows 8.1 problem still exist.

Things I've already tried:
Updated all drivers even installed older versions of Nvidia driver(every update was or install was made after removing drivers using DDU).
Did a clean install of windows changed from win10 to 8.1
Tweaked BIOS settings such as Disabling/Enabling HPET (both on bios as well as os), Virtualization, and few other tweaks (didn't underclock or overclock as I've never oc'd my processor before)
Changed CPU and GPU to preffered maximum performance under power saving.
Removed GPU and plugged in to onboard VGA.
Tried connecting pc to a different power outlet.
Removed the chasis and front cover.
Checked for DPC Latency and tried disabling each driver.
Latencymon showed DirectX kernal and some nvidia to have high execution times.
I've honestly never had this problem before, it just randomly started and it feels like I've tried alost every solution.
My PC specs:
CPU: Intel Core2Quad Q6600 2.4Ghz
Motherboard: Digilite Dl-g41-mx3-lte
GPU: Nvidia 730GT 2Gb DDR3
Ram: 2×2GB DDR3 Adata
PSU: Zebronics 450W
No thermal issues.

Here is a screenshot and stats from LatencyMon

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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 0:02:47 (h:mm:ss) on all processors.
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SYSTEM INFORMATION

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Computer name: BEASTIE
OS version: Windows 8 , 6.2, build: 9200 (x64)
Hardware: DL-G41MX3-LT, Intel

CPU: GenuineIntel Intel(R) Core(TM)2 Quad CPU Q6600 @
2.40GHz
Logical processors: 4

Processor groups: 1
RAM: 4095 MB total
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CPU SPEED
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Reported CPU speed: 2400.0 MHz

Measured CPU speed: 2414.0 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): 2361.512341
Average measured interrupt to process latency (µs): 4.621126

Highest measured interrupt to DPC latency (µs): 1145.130826
Average measured interrupt to DPC latency (µs): 1.155901
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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): 2303.411250
Driver with highest ISR routine execution time: dxgkrnl.sys - DirectX Graphics Kernel,

Microsoft Corporation
Highest reported total ISR routine time (%): 0.498777
Driver with highest ISR total time: dxgkrnl.sys - DirectX Graphics Kernel,

Microsoft Corporation
Total time spent in ISRs (%) 0.584392
ISR count (execution time <250 µs): 237125
ISR count (execution time 250-500 µs): 0

ISR count (execution time 500-999 µs): 138
ISR count (execution time 1000-1999 µs): 19
ISR count (execution time 2000-3999 µs): 5

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): 2310.18750
Driver with highest DPC routine execution time: nvlddmkm.sys - NVIDIA Windows Kernel
Mode Driver, Version 388.43 , NVIDIA Corporation

Highest reported total DPC routine time (%): 0.133389
Driver with highest DPC total execution time: dxgkrnl.sys - DirectX Graphics Kernel,
Microsoft Corporation
Total time spent in DPCs (%) 0.388843

DPC count (execution time <250 µs): 575015
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 74
DPC count (execution time 1000-1999 µs): 4
DPC count (execution time 2000-3999 µs): 2

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: metroll.exe
Total number of hard pagefaults 672
Hard pagefault count of hardest hit process: 402
Highest hard pagefault resolution time (µs): 192291.150

Total time spent in hard pagefaults (%): 0.882426
Number of processes hit: 6

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PER CPU DATA

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CPU 0 Interrupt cycle time (s): 3.890188
CPU 0 ISR highest execution time (µs): 2183.40750
CPU 0 ISR total execution time (s): 1.016816

CPU 0 ISR count: 59177
CPU 0 DPC highest execution time (µs): 772.92750
CPU 0 DPC total execution time (s): 1.043320
CPU 0 DPC count: 449781
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CPU 1 Interrupt cycle time (s): 2.408799
CPU 1 ISR highest execution time (µs): 2260.73250
CPU 1 ISR total execution time (s): 0.922450
CPU 1 ISR count: 59280
CPU 1 DPC highest execution time (µs): 2310.18750

CPU 1 DPC total execution time (s): 0.483412
CPU 1 DPC count: 41516
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CPU 2 Interrupt cycle time (s): 2.571298

CPU 2 ISR highest execution time (µs): 2151.116250
CPU 2 ISR total execution time (s): 1.039594
CPU 2 ISR count: 59529
CPU 2 DPC highest execution time (µs): 2293.698750
CPU 2 DPC total execution time (s): 0.560240
CPU 2 DPC count: 42028

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CPU 3 Interrupt cycle time (s): 2.395053

CPU 3 ISR highest execution time (µs): 2303.411250

CPU 3 ISR total execution time (s): 0.928152

CPU 3 ISR count: 59301
CPU 3 DPC highest execution time (µs): 1883.246250
CPU 3 DPC total execution time (s): 0.512677
CPU 3 DPC count: 41770

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