Heavy lag, system interrupts, high DPC and IRS spikes, visual glitches

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amadeok

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Sep 8, 2013
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Hello,
Thanks for support.
For the past two months or so i have been having heavy lag during games, every time task manager shows system interrupts and system using 10% more or less of cpu and causing heavy mouse and performance lag and sometimes audio lag as well. I run WPR and it shows high DPC and IRS spikes related to the nvidia and directx drivers, as well as usbxhci.sys and usbport.sys. Recently i bought a new PSU wich seems too have improved the situation but it still happens from time to time.

Hardware:
i5 3470
Asus P8H61-MX USB3
8GB Corsair Vengeance Ram
2TB Barracuda HDD Seagate
Seasonic s12ii 620W
GTX 970 MSI gaming 4g

Things i tried:
Drivers: 358.50, 358.91, 361.60, 361.75(all uninstalled using DDU)
Switching to windows 10
unplugging frontal usb ports
reseating the card and blowing air into the pci-e slot
disable nvidia shield streaming service
formatting hard drive completely
uninstalled usb roots
set performance plan on power options
entered this on cmd: "bcdedit /set disabledynamictick yes"

Other things that have been happening:
Always in the boot screen i see little blue dots, one or two pixels big.
visual glitch:
http://postimg.org/image/vwe76vdu7/
http://postimg.org/image/ydv0b9427/
at this point i would say the problem is the gpu right?
thanks in advance
 
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Since that board has an onboard graphics output, another final test would be to run off that. Gaming on it will be impractical but if those glitches disappear it's a solid piece of evidence. Graphical glitches like those are also possible due to faulty RAM but the lag in games tied to graphics driver suggests that's not the problem.
 
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I think this is a generic answer but the only thing I can think is causing this is a dying component. Motherboard maybe?
Other thing that I'm thinking that could be the cause is a potentially bad installed hardware.

If you have other components lying around and that are compatible with your other components, try switching between them to see if the problem is any hardware related. Gl
 
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I tried the onboard gpu and the glitch was not present.
i run a couple of stress tests and the gpu is ok not past 71 degrees but the cpu strangely up to 88 degrees, could this be the problem?
edit:
i just ran both the cpu and gpu stress test at the same time and i noticed that the gpu load doesnt stay at 100%, rather stays at 30-50%, what does this mean?
 
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Well I think not, Intel can hold up until 100°C.
If you tried onboard graphics and it solved the problem, the problem is related to your gpu. Try switching between different gpu models to see if it fixes the glitch, if not, probably your PCIe is damaged.
 
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I see, would a r7 250 be ok to test? very strangely when i took out the vga i saw there was something that looked as a residue of some liquid, but i swear that i have never drop anything on it, i had never even cleaned it before. I remember a while back also the pc started doing a high pitch sound so i thought it was that cool whine thing so since i had read cool whine doesnt affect performance i didnt think to send it for replacement.
 
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Hello again,
I tested the pc with a r7 250 for 4 days without any lag or high cpu usage from system interrupt or dpc or irs spikes, i think ill send for replacement.

Edit:
Today i went away for a while and when i came back the screen was black. The keyboard was still responding. it was the only problem i've had so far with this vga. Had to restart pc through button
 
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