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4000us latency, windows 8

post #1 of 5
Thread Starter 
I know Windows 8 measures the dpc latency differently, but all reports say that it should be 1000us, not 4000.

Everything seems fine, but should I bother doing anything about it?

dpc.PNG


I have:
2600k @ 4.7 ghz
ddr3 @ 1600mhz, 9-9-9-24 (16 gigs)
p8z77-m pro
gtx 670
2x120gb ssd raid 0(vertex 3) + 2x3tb raid 1 + 2x500gb raid 1

I have HPET disabled in my bios. I was getting freezes with it on in Windows 8. I didn't have that problem in Windows 7 though.
post #2 of 5
I had an issue with my sound card playing music with an echo, and I used that latency checker.
It is not compatible with Windows 8 as far as I know.
I remember the website has a disclaimer saying so also..
post #3 of 5
Thread Starter 
Yeah it's not, but everywhere I read I should be getting 1000us.

http://forums.guru3d.com/showthread.php?t=374210

i saw this thread where he ran this cmd as administrator
Code:
bcdedit /set disabledynamictick yes

He gets 12us of latency.

I ran the command as administrator and rebooted and now I get a stable 1000us of latency.

I'm not sure if I should be getting 1000us or a very low measurement like him.



EDIT: I ran latencymon which is compatible with windows8.

It says:
Quote:
Your system seems to have difficulty handling real-time audio and other tasks. You amy experience drop outs, clicks or pops due to buffer underruns. One or more DPC routines that belong to a driver running your system appears to be executing for too long. At least one detected problem appears to be network related. In case you are using a WLAN adapter, try disabling it to get better results. One problem may be related to power management, disable CPU throttling settings in Control Panel and BIOS setup. (Check for BIOS updates).


Current DPC: 74
Highest: 1337 (lol)

My DPC is spiking all over.


EDIT: Its suggestion seems to have helped. I unplugged my wifi usb device and my dpc is a lot lower now.

Still spikes up to 700 sometimes though.

EDIT: Randomly still spikes to 1400.
Edited by jigglywiggly - 7/28/13 at 4:46pm
post #4 of 5
check Device manager for any devices with the yellow hazard symbol - if so that's likely your cause.
I was told there's an order to importance to latency, Peripheral cards make the biggest impact (Networking cards, Sound cards, Raid cards) then GPUs then general system latency (CPU, Chipset, HDD)

I'd troubleshoot in that order, remove all my peripheral cards individually, and see if any of those cure it. (if not, take them all out and check again)
leave them out and check the GPU and then the individual drives.
It's a long boring task, (took me a whole day).

I also found the only solution for my high latency (which was manifested in something noticeable) was a reinstall.

Good luck!
post #5 of 5
http://www.ma-config.com/en

Also disable devices one by one to isolate the culprit.
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Ti-89 Titanium
(13 items)
 
 
CPUMotherboardRAMHard Drive
Motorola 68k @16 MHz Ti-89 HW4 256 KB 2.6 MB Flash ROM 
OSMonitorPowerCase
Ti-89 OS 3.10 LCD Dot-Matrix 160x100 4x 1.5V AAA Ti-89 HW4 Black 
CPUMotherboardGraphicsRAM
Intel Core™ i7 930 Gigabyte GA-X58A-UD3R 2.0 Gigabyte GTX 470 SOC G.Skill RX 2x4GB 1600C8 
Hard DriveHard DriveOptical DriveCooling
PNY Prevail Elite 120GB Hitachi 7K1000.C 1TB LG GH24LS50 Noctua NH-C12P SE14 
OSOSMonitorKeyboard
Windows 8 Pro x64 Lubuntu 13.10 x64 Samsung BX2250 Logitech Illuminated 
PowerCaseMouseAudio
Be Quiet! S.P. E⁷ 600W Fractal Design Core 3000 Logitech G300 AKG K240 Studio 
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