Does anyone get DPC latency issues with this board?.
I have an i7 3770k and the DPC latency is terrible, constant popping and crackling sound. I have to run DPC latency checker and prime95 every time i boot it up to get rid of it for the day. Iv'e tried disabling nearly all relevant devices in device manager (LAN drivers etc) and nothing changes. I have disabled intel 4000 graphics and still have the DPC latency.
Yes. There is a known problem with Easy Tune 6. Quit that software and check DPC latency.
It was mentionned by AnandTech in
their review:
EasyTune6 also has one big flaw, which has sprung up in my testing several times over the past year. Any software that includes monitoring tools has a large effect on how the CPU processes Deferred Procedure Calls (DPC). These calls are queued in line with priority - IO gets given a priority, monitoring gets given a priority, audio gets a priority. The issue comes with comparing the DPC Latency when these monitoring tools are active. In the BIOS, the monitoring tools are given high priority at the expense of everything else, causing a 20x increase in the latency of other signals, for example audio. This means that during monitoring, the audio could have a large (>3ms) direct latency between production and output.
My setup is a 3570K, Gigabyte "Windforce" 670OC, the only other PCI card is a TP-LINK TL-WDN4800 for Wifi.
I didn't have any issues for several weeks. In fact as I am writing Easy Tune is loaded (didn't remove the "Always run on next reboot" option, yet)... and now the DPC latency is gone again.
Fortunately when it was happening yesterday.. simply closing EasyTune6 got rid of it. I am using the F14 BIOS.
The only reason I use ET6 is because it lets me run the front 200mm Bitfenix at every low RPM. I like my computer really quiet.
Since then I tried running Speedfan, GPU-Z and HWMonitor all at the same time, causing no DPC latency.
So I'm a bit puzzled. Why does ET6 cause such latency if other software can read the fans and temperatures just fine? EDIT: Actually I don't know how to change the CPU and SYSFAN speeds with Speedfan, so that may be what ET6 allows to do that causes the latency? I see the right PWM settings in Speefan (mines are 60%, 30% and 100%), but changing those seem to have no effect.
PS: I remember vaguely something about HPET while surfing yesterday.
Here, purportedly can help reduce DPC latency though I'm not sure it actually addresses the issue at hand here. But would love to hear more about this from people having thoroughly tested it.
