DPC Latency Spikes + MSI P55-GD55 + i5-750 + Clipping in playback & record

I'm getting spikes in DPC Latency causing clipping sounds for playback and record using the on-board Realtek. I have all the latest drivers/bios from nvidia, msi, etc.
System:
Windows 7 x64
MSI P55-GD65 @ BIOS 1.3 (Turned off EIST in BIOS, helped but spikes remain)
Intel i5-750
OCZ DDR3 4GB @ 7-7-7-21 1.65v
Nvidia GT220
Have other users mention anything about latency issues with this model? Maybe a BIOS update like this thread can fix it?
https://forum-en.msi.com/index.php?topic=129152.0
Please, I hope it's a BIOS issue cause I'm lost as to what the problem could be. I tried disable everything (sound/network) on the board and still latency spikes.

So MSI support gave me a new beta bios to test out v1.4B5, and the spikes are less frequent but still happens.
I can try disabling some services but not sure where to even start. It does look like a BIOS update might be the actual solution so I'm hoping support can eventually help me out.

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MSI P55-GD55 Won't post 3 Beeps-Need Assistance

Built many PCs but never had a problem like this. Starting to think MB is bad.
Built this in Dec 2008
MSI P55-GD55
A-DATA Gaming Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600
Intel Core i5-750
OCZ ModXStream Pro OCZ500MXSP 500W
MSI N95GT-MD512Z GeForce 9500 GT 512MB 128-bit GDDR2 PCI Express 2.0 x16 HDCP Ready Video Card
Western Digital Caviar Black WD1001FALS 1TB
COOLER MASTER Hyper 212 Plus Cooler
2 weeks ago PC would do nothing at all after I turned off and then tried to restart. Thought I had bad power supply, but it checked out. Cleared cmos by removing battery and turned off oc genie and that seemed to cure problem.
Left PC on ever since. Had to turn off yesterday to check unrelated network issue and when I tried to restart It won't post. Just get 3 beeps. No video. Nothing. Tried to clear cmos, switch memory sticks, only use one mem stick in slot 1 and I get nothing but 3 beeps. Very unlikely that both sticks are bad. Tried powering on from internal switch and got nothing but 3 beeps. Beeps are less than 1 second in duration so I guess they are short beeps.
Any thoughts are greatly appreciated.
If I have to RMA to MSI how long does it take to get replacement? What do I have to send to MSI, all contents of retail box or just the board?

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If I have to RMA to MSI how long does it take to get replacement?
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I am ready to toss this board and buy another unless I can get this working.
At the moment there is know certainty about the definate cause for your problem. What makes you so sure that the board is the cause (and not your CPU (which hosts the memory controller, after all), faulty RAM sticks (have you tested every single stick of RAM you have in the first slot (check user manual) and cleared CMOS (with A/C power cable unplugged from PSU before each new start-up attempt)?).
A contact problem between CPU Pads and board socket pins could also cause this (please reseat CPU and heatsink). Another possible cause is a short-circuit problem inside the case (test the board outside the case on a non-conducting surface).

Dv6 series - DPC latency spikes

I currently have a Dell laptop with frequent DPC latency spikes. As a result, I will be returning the laptop for a new laptop that does not have those spikes.
http://www.shopping.hp.com/webapp/shopping/product_detail.do?storeName=storefronts&landing=rts_noteb...
This model looks really good, but I have some questions
I was wondering, does any have DPC latency spikes on this system? I don't want to replace my current system for another system with the same problems.

Bumping this thread.
Can someone please respond.

ACPI.sys, NDIS.sys, and TCPIP.sys causing massive DPC latency spikes

I am running Win 7 Ultimate. I recently reinstalled my OS. Using LatencyMon and DPCLatency checker, I've noticed that these three drivers are causing massive spikes. How do I replace these files with non-problematic files?
(Originally, my computer was on Home Prem, I did an anytime upgrade to Ultimate, this time I did a clean install)
Thanks.

Dear all,
I am also doing home recording with my computer, via firewire and I also see latency spikes.
Its for an advanced home user difficult to judge, what is causing issues.
Audio clicks and drops were mainly caused on my (high performance system) by non optimal combination of Firewire Card/Chipset, Windows 7 Firewire driver and driver of the audio Interface, but which I could finally solve.
My Solution for my system:
- 1st I had to buy a new firewire card with recommended chipset of audio interface vendor
- Additionally I had to use the Win7 Firewire "legacy" driver
-> Then my audio clicks and drops went away.
Month later the vendor releases a new version of his Mixer/driver for the audio interface (Saffire mix control).
And what shall I tell:
- the normal Win7 firewire driver could be chosen (which seems to be more optimized in terms of latency)
- under Cubase (with setting "optimize cubase for windows") the firewire latency went down from 200us to even 76-90us on average.
Of course Microsoft shall work on optimizing their OS, I want an optimized OS as good base for everything.
But all my problems went away in terms of recording, at least on my system, when I optimized things around Mircrosoft.
With a Laptop this might be a different issue ..
LatencyMon v3.0: CONCLUSION
Your system seems to have difficulty handling real-time audio and other tasks. You may experience drop outs, clicks or pops due to buffer underruns. One or more DPC routines belonging to a driver running in your system appear to be executing for too long. At
least one detected problem appears to be network related. You may have to disable wireless adapters to get better results.
OS version:
Windows 7 Service Pack 1, 6.1, build: 7601
CPU:
GenuineIntel Intel(R) Core(TM) i7 CPU         860 @ 2.80GHz
Logical processors:                                   8
RAM:
17170518016 total
VM:
2147352576, free: 1916923904
Reported CPU speed:                                   2807 MHz
Measured CPU speed:                                   2722 MHz
Highest measured kernel timer latency (µs):           1289.9413
Highest measured SMI routine or CPU stall (µs)        98.8614
Highest DPC routine execution time (µs):              1978.9440
Driver with highest DPC routine execution time:       ndis.sys - NDIS 6.20-Treiber, Microsoft Corporation
Highest reported total DPC routine time (%):          0.9446
Driver with highest DPC total execution time:         Wdf01000.sys - Kernelmodustreiber-Frameworklaufzeit, Microsoft Corporation
Total time spent in DPCs (%)                          1.7380
DPC count (execution time <250 µs):                   3443062
DPC count (execution time 250-500 µs):                0
DPC count (execution time 500-999 µs):                68
DPC count (execution time 1000-1999 µs):              6
DPC count (execution time 2000-3999 µs):              0
DPC count (execution time >=4000 µs):                 0

MSI P55-GD55 - unstable system

Just built this PC and it's not very stable - experiencing random lockups a few times a day. It's locking up the same way before and after updating everything (Drivers, windows updates, latest bios...etc -screen just freezes - hard reboot required)
Everything in the bios is set to default; CPU temp is good (40C); plenty of wattage (have tried 2 PS's infact).
After doing some searching on here it looks like there's some conflicts with the Corsair RAM - I'm going to do some more searching to see if I should be tweaking the voltage or other settings in the bios to improve stablity.
SPECS:
Windows 7 Pro 64 bit
Intel Core i5
MSI GeForce 250 GTS
Corsair 2x 2GB DDR3 (1600)
Thermaltake 600 PS
~Kevin

The default voltage for DDR3 modules is 1.5V ´+/- 0.075V (this is the industry standard voltage). That is why the BIOS will set it. "PC3-12800 1600Mhz" is an overclocking rating (those modules are actually just DDR3-1333). The voltage increase is necessary to compensate the overclock to DDR3-1600 and yes, it needs to be set manually.
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I wonder if this is why several other people were having problems with the new MSI boards and Corsair RAM?
This has nothing to do with the combination of MSI Mainboard and Corsair Modules in particular. Using modules with overclocked speed ratings are likely to cause problems like this on every system.

Re: Update Intel RAID Option ROM BIOS on MSI P55-GD55 motherboard?

How large may I ask?

Quote from: john1231 on Today at 00:07:49Mine neither :/
and i cant find a backpack or bag that fits the G72 in the local stores in my town! i had to return one (17,3') to the store because it would not fit
now i ...

Custom Bios for DPC Latency gone?

I have the P43 Neo and suffer from DPC Latency spikes, which is very annoying since I work with audio a lot.
However, the link to the 'custom bios' in the following topic is not available anymore:
https://forum-en.msi.com/index.php?topic=125206.0
Where can I download it?

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MSI custom bios can be obtained from MSI Tech. here: http://ocss.msi.com.tw/

P55-GD55 new mobo won't boot

I am building a new computer and purchased the following:
MSI P55-GD55 mobo
Intel i5-750 LGA1156 cpu
G.Skill DDR3-1600 2gb RAM (2)
Seagate 250 gb SATA drive
Corsair 650w Power Supply
Nvidia GeForce 9800 GTX+ video
I have built many computers and have never had this particular problem
With everything connected, when I press the power switch, LED1 turns on briefly then turns off.
The fans kick in for about a second and then turn off.
I tried disconnecting everything I could think of and get the same results with just cpu, memory and PS connected.
I also removed the memory and get the same result. I would expect to get past this and get a beep code if it got as far as checking the RAM
I verified nothing from the case is shorting to the Mobo
Anyone have any ideas?
Also, this got submitted partially complete because I am on a laptop and the palm of my hand hit a button. So I came back and edited it.

phlipg, start your own new topic, don't hijack. >> Please read and comply with the Forum Rules <<
>> Posting Guide <<

T520 Sound Issues...Latency Spikes...SIMPLE SOLUTION !!

Hello All,
Many of us T520 owners have had problems with skipping/cracking/distorted audio as a result of DPC Latency Spikes. I have been reading every available thread on the topic and I found a simple solution in a T420 thread that I wanted to share with any T520 users that may have overlooked it.
The Latency Spikes experienced by many users (including myself) were caused by the Ethernet Driver (Intel 82579LM Gigabit Adapter). The current T520 is loaded with Intel driver version 11.12.38.2001. However, if you revert to version 11.12.36.0 the issue disappears. You can download the driver directly from the HP website. (It is no longer available on the Lenovo Support Page)
Thanks again to the original T420 poster and GOOD LUCK!
Moderator Note: Links fixed.

Just bought a NEW T520 with nVidia 4200 , i5 , 4GB, 500GB (7K2 rpm)....
Had before Y560p, & resplved problems with that by reversing the bios to an older one, I didn't found it on Lenovo web, but hte guy from Thailand sended it to me on e-mail (he had problems too).
So it was OK but I wanted the best U can buy... & bought T520.... Had a BIG problem on a gig 1st time a used it ...
Music just stopped for a second or two.... big spike in latency monitor (I started it before work)... then I put to OFF WiFi (on the switch - left side). OK for about 45 min, then AGAIN.... I have gone crazy .... bought a double priced laptop & have problems again ??!?! Is that possible ?!?!?
BTW the drivers on my LAN card are : 11.15.16.0
Anyone know the answer for this ? Thanks in advance, while I'm reconsidering (not glad about that cose I love the Lenovo brand) buying the Apple Mac Book Pro...

HOWTO: Low DPC latencies ( 100 us) on bootcamped Macbooks (Pro)

Here is a small HOWTO for getting the lowest possible DPC latencies (<100 us) on bootcamped Macbooks Pro (late 2008):
Disclaimer: I did all tests on my late 2008 Macbook Pro Unibody 2.8 GHz model with NVidia chipset and graphic. Most of the following suggestions should apply to standard Macbook models and likely older generation as well.
First of all Intel Speedstep can lead to dropouts and higher DPC latencies on small load! Unfortunately all tools that are supposed to manually switch Speedstep off don't seem to run on the late Macbooks (Pro) while on OS X you can use "Coolbook".
Your only way to make sure your processor is clocked high enough and not dynamically switching is to put up a constant load (like running your DAW pretty hot or running Prime95 at "Idle/Lowest" process Priority in the background). I will keep investigating if I can find a tool to switch Speedstep off.
Most importantly (to get rid of really bad DPC latency spikes):
Kill the process "KBDMGR.EXE"!
That's Apple's driver for controlling brightness and keyboard lighting via the function keys and setting tap options for the trackpad. It seems to have broken multithreading!
You can also change the CPU affinity of KBDMGR.EXE to CPU1 (not CPU0!) which will help decreasing DPC Latencies alot, but there will still be Audio dropouts.
Here's a small toolkit I put together that allows you to conviniently enable/disable Apple's "Boot Camp" tray application (KBDMGR.EXE) via an icon link and/or keyboard shortcut. Optionally it will switch the function of the F-Keys automatically for you depending on whether Boot Camp is loaded or not.
Furthermore it automatically turns Boot Camp's CPU priority to "Idle" and CPU affinity to CPU1 in order to turn down the bug induced DPC Latencies and prevent dropouts with Windows sounds and Media Player playback. Professional Audio users will find that only turning off Boot Camp will allow low audio latency usage. Installation instructions are included in the README.TXT for your convinience.
Boot CampED download page
Direct Download:
Boot CampED.zip - 3.3 kb
Turn off the Broadcom 802.11N WLAN driver via Device-Manager or update to the latest drivers via Microsoft Update Catalog.
Like on OS X the Airport module can lead to audio dropouts. The DPC Latencies produced by the Broadcom driver are less regular than the KBDMGR thing, alot higher in value. Best thing is to try for your own needs.
Update:Meanwhile a new Broadcom drivers was published via Microsoft's Update Catalog named "Broadcom - Network - Broadcom 4322AG 802.11a/b/g/draft-n Wi-Fi Adapter " (4322 is the chip used). This one comes with both low DPC latencies and finally the ability to use the full rate upto 300 mbit/s. Go get it! For safety you might still want to turn WLAN off during critical audio work though.
Change the graphic-card driver to "Standard VGA Driver" via Device-Manager or use RIVATUNER to enforce a fixed clock-rate and performance mode.
Update:The dynamic clock-rate switching happening with NVidia drivers in order to save power and keep temperatures low leads to extreme DPC spikes for each switch and constantly high DPC latencies when it settles in low performance 2D mode. RIVATUNER's "Enforce Performance Mode" option can be used to set the card to a fixed clock-rate. I recommend using "Low Power 3D" for audio work.
User of XP might think that they don't need this, but be aware that on XP the NVidia driver keeps running at highest clock-rates in "Performance 3D Mode" all the time. Via RIVATUNER you can switch to "Low Power 3D".
Turn off the ACPI compliant Battery driver via Device-Manager
This driver polls the battery for its current load status and produces a small, single, short spike exactly every 15 seconds. In my own tests I found that it doesn't seem to affect low latency audio performance. Furthermore turning it off will remove monitoring of your current battery status. But if you are running on power-chord anyway and want to make absolutely sure you can turn it off.
All other devices don't add much if anything to DPC latencies, but can savely be turned off if you don't need them (like Nvidia LAN, Bluetooth, Onboard High Definition Audio).
Attention: Removing the Battery while the power chord is connected results in permanently reduced CPU clock (downto the lowest clock setting possible). According to Apple this is done to prevent overloading the power-supply during heavy load as it needs the assistance of the battery from time to time.

I'd like to underline that these are workaround. Now that the Broadcom drivers are fixed it is up to Apple to fix KBDMGR and to get the NVidia drivers fixed!
Furthermore it seems as if only Vista 32-bit and OS X are heavily affected by Intel Speedstep, Vista 64-bit and Windows 7 (32/64) work alot better in this regard. XP is a mixed bag.
Here are some screenshots to prove that the workarounds do help:
DPC Latency before applying the workarounds:
DPC Latency Vista 64-bit (Idle, Speedstep enabled) after applying the workarounds:
DPC Latency Windows 7 64-bit (Idle: Speedstep enabled) after applying the workarounds:
As you can see Vista's DPCs run well below 100 us once everything is optimized, Windows 7 is a bit worse, XP is even better. But practically you get the same results when using all three for professional Audio work.
Message was edited by: T1mur

Need help: front audio w/ P55-GD55 and thermaltake armor

Hey guys,
I am trying to connect the front panel audio on my thermaltake armor(VA8000BWS) case to my msi p55-gd55 motherboard. My case has 1 wire coming from the front panel with 2 connections on the end that connects to the mobo. The ear mic chart for my case lists as follows:
1-EAR R
2-Return R
3-EAR L
4-Return L
5-MIC IN
6-MIC VCC or MICBIAS
7-Ground
The chart for my motherboard lists as follows:
1-MIC L
2-Ground
3-MIC R
4-PRESENCE#
5-HEAD PHONE R
6-MIC DETECTION
7-SENSE_SEND
8-NO PIN
9-HEAD PHONE L
10-HEAD PHONE DETECTION
Do I simply plug in my cable as is or do I have to move around some of the wires? Any help would be greatly appreciated!

Quote from: XFM on 14-November-13, 07:56:50
That is a pretty old case and front panel audio in it is for AL'97 not the HD audio that the MB has. You need to get a front panel audio module for HD audio from somewhere.
So i can't connect the front panel audio on the MB? It was nice if i could, but no problems then.
Thx for the help

MSI calls gt780 a "sound machine" but it has bad dpc latency and ground loop

Good quality sound on a laptop is governed by two things, freedom from ground loops and low DPC latency.
Ground Loop Hum: this occurs when manufacturers use poorly isolated power supplies (CHEAP POWER SUPPLIES). How it manifests is when you plug your laptop into an external sound production system (Stereo or headphones or mixer, etc). Well when you turn up the volume you will notice this weird humming/slightly screetching noise. It often will change pitch as you move mouse etc. Its a ground loop. It comes from poor isolation and ALL PROFESSIONAL audio equipment is designed to eliminate this. Even a cheap ghettoblaster is But not this "sound specialized laptop." Aweful. You will know it is a ground loop because when you hear the noise unplug th epower supply to the laptop and Poof! its gone.
DPC Latency Where as ground loops will just give you poor sound output, DPC latency is a far more sinister problem for a person who is going to use a computer for professional sound. It is related to something called an IRQ request and it occurs on laptops that are not designed to prioritize audio.
Download this tool and run it on your gt780. http://www.thesycon.de/deu/latency_check.shtml You will note its mostly green but occasionally it will have red spikes. Those red spikes represent audio drop outs so if your hope was to use this computer for professional sound capture or production (protools, abletone, cuebase). Think again. Those will be big "POP!!!!!"s when they occur during actual audio manipulation.
Sometimes manufacturers release firmware or drivers that help with DPC. Lets pray but as for the ground loop. That is not and will not go away unless they get it their hearts to use a proper power supply. Shame on you msi for touting this as an audio laptop when its audio simply sucks crap. Basically you threw a few loud speakers and you call it made for sound??? HARDLY.
Other then that its fast. What a waste...

Ok, I have found out the "sleep mode" kicking in was one of the major culprits. I dissabled that and latencies are a lot better. No red spikes in over ten minute but not yet under any load. If any one else is trying the program please post your results.

*Solved* MSI P43 Neo-F DPC Latency Issue - Latest BIOS Fix

Hi, I'd like to avail of the latest BIOS fix for the DPC latency problem on my MSI P43 Neo-F (MS-7519) 1.0.
I'm currently using BIOS 1.9, I haven't flashed to 1.A yet. Does 1.A include a fix or is there another BIOS that's as up-to-date as 1.9 or 1.A that would have the fix, with any links to download? I'm thinking along the lines of the A7519ICI.1xx series, whatever is the latest.
Thanks in advance.
EDIT: I have contacted MSI at http://ocss.msi.com.tw/
I don't suppose there is any links to the latest A7519ICI.1xx BIOS that I can avail of outside of the private MSI FTP server?

Thanks all for the advice.
OK, so here's the story. I couldn't relax with those voltages showing up as they were, so I flashed my BIOS to A7519IMS.1A0 (1.A), which is the latest public release for the P43 Neo-F. I was previously on A7519IMS.190 (1.9) before today.
When I flashed to A7519ICI.104, I noticed the version number was actually 1.10B4 (which I'm guessing can actually be expressed as 1.AB4 - a beta version for the latest public release, 1.A). The flash to A7519ICI.104 solved the DPC Latency issue, as when I used A7519IMS.190 (1.9) it was spiking.
There is a happy ending. The flash to A7519IMS.1A0 (1.A) has also shown no spikes in the DPC Latency test. It seems the fix must be present in the latest public release BIOS for the P43 Neo-F after-all!
This screen-shot was taken just a moment ago, proof that the issue has been resolved without a modified BIOS:
Hope this helps anyone else out who is using the same motherboard and experiencing the same issues. Just get the latest public BIOS. No hassle!
http://www.msi.com/index.php?func=downloaddetail&type=bios&maincat_no=1&prod_no=1484
Please make sure that your motherboard is in-fact the MSI P43 Neo-F (MS-7519) before you flash the BIOS with any of the ones contained within the link above

MSI P45 Neo3 DPC Latency issues

Hi guys. I'm on a MSI P45 Neo3 and so far everything's good. The only thing wrong is the high memory latencies I'm seeing in the DPC latency program + programs sometimes taking too long to load or start up etc.
My motherboard is MSI P45 Neo3 - MS-7514 V1.0
Is there any beta BIOS I can try to fix this problem for my motherboard?

My configuration:
Antec Midi Tower Sonata III Life Style ATX 500W
Arctic Processor cooler F7-PRO
Asus PCI-e Radeon HD3450 256MB Silent DVI/HDCP videocard
Intel Core 2 Duo E8400 3.00GHz 1333 6MB Boxed (C0 I think)
LG DVD-/+/RAM GH20NS10 20x/20x/12x Bulk
Logitech MX518 Optical Mouse (connected via PS/2)
Microsoft Digital Media Pro Keyboard (connected via PS/2)
MSI P45 NEO3-FR iP45 (PCB 1.0)
NEC Floppydrive 1,44MB 3,5"
OCZ 2x2GB DDR2 SDRAM PC6400 CL5.0 Platinum (in dual channel mode)
Samsung 640GB SATA300 16MB, HD642JJ (in RAID "prepared" mode)
Sweex Card Reader CR005V2 All-in-1 Intern 3,5" USB2.0
All running their latest firmware/BIOS and drivers as far as I know.
The system uses default BIOS (v1.6) settings, no overclocking at all.
Where should I start my investigation?
Disable software, drivers, or hardware?
Any suggestions on which particular item?

MSI P55-GD80 Benchies. Whooping i5 750 @ 4.8ghz on Dry Ice!!!

Below were shots taken from the Philippines Launch Event for MSI P55 Motherboards. My friend bartman1973 & I were invited by the local distro of MSI & got the privileged overclocking the MSI P55 GD-80 motherboard.
Here are some pictures we took on that event. Three MSI P55 motherboards were introduced and these were MSI P55-GD80 (High-End), MSI P55-GD65 (Mainstream) & MSI P55-CD53 (Entry)
MSI P55-GD80
MSI P55-GD65
MSI P55-CD53
And here is the specifications of the demo unit we used for the event
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Motherboard: MSI P55-GD80 beta bios 1.51 I think
Processor: Intel i5 750 2.67 default clock
Memory: Team Xtreem Dark 2x1GB 1866
VC: MSI R4890 Cyclone Super Overclocked Edition (1ghz core damn!!! 1000mhz mems)
PSU: Acbel M8 670 Modular PSU
Harddisk: WD Raptor 150GB
Monitor: Hanns-G HH281 28" LCD
Cooler: Koolance
System Snapshot
So here are the bench scores.
1. Lets start with stock settings
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Vista Ultimate SP1 32bit was used for the Operating System. No tweaks at all
2. OC Genie Enabled
3. Air Cooling AVC Global Star from MSI was used
For the Grand Finale. Whooping 4.8GHZ on Dry ICE!!!
Quote
For this last overclock run we made. We didn't have the time anymore for checking the stability of the sytem. But we are still hoping to reach the 5ghz barrier for the next following days.
We will update you guys on this and post more benchies if ever.
--I made your larger images clickable for those not using Firefox, and so people don't have to leave the forum to see images who do(view image in FF).
Click the modify button to see how I hotlinked the images using url tags.
--Mike

managed to get 4.9ghz already few clocks and would hit the 5 ghz barrier already. WAAAAHHHH!!!!!. Itch itch.......
my good friend DJSUB. Helped me out pouring some crushed Dry Ice.
Sweet 233 Bclock ^^ . Same MSI P55-GD80 system used

DPC Latency Spikes + MSI P55-GD55 + i5-750 + Clipping in playback & record

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