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High DPC Latency Windows 7 ROG Xonar Phoebus

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June 9, 2013 9:45:34 AM

Hey!
A few weeks ago I noticed that my audio was out of sync. I learned that this was caused by "DPC Latency". Here are my DPC Latency results from various tools:

LatencyMON (Running for a few seconds): http://puu.sh/3bRyT
DPC Latency Checker: http://puu.sh/3aLpN / http://puu.sh/32Qni

I have Windows 7 64Bit. Here are my specs:
Spoiler
Case: Corsair 800D
Case Lighting: Remote Controlled Multi-Colored LED
Case Fans: ORIGIN High-Performance Ultra Silent Fans - Black
Motherboard: ASUS Rampage IV Extreme (SATA 6Gb/s USB 3.0 4-WaySLI capable)
System Cooling: ORIGIN FROSTBYTE 360 Sealed Liquid Cooling System - High Performance Push/Pull
Processors: Overclocked Intel Extreme Edition Core i7 3970X 4.1GHz - 4.4GHz LGA 2011 Hex-Core Processor (15MB L3 Cache)
Power Supply: 1.2 Kilowatt Corsair AX1200i
Graphic Cards: Dual 4GB EVGA GTX 690
Memory: 16GB Corsair Vengeance DDR3 1866Mhz (4x4GB)
Operating System: Genuine MS Windows 7 Home Premium 64-Bit Edition
Hard Drive One: 240GB Intel 520 Series
Hard Drive Two: 1TB SATA 6.0Gb/s, 7200RPM, 32MB Cache
Optical Drive One: 24X CD/DVD Burner (DVD+/-RW) w/double layer write capability (No DVD Playback Software for Windows 8 Included)
Bay Devices: AeroCool Touch 2000 - Touch LCD, Temperature Display and Fan Controller
Audio: ASUS ROG Xonar Phoebus
Networking: Onboard Network Port


I'm using an Astro A40 2013 Edition headset. I also tried with my Razer Tiamat 7.1, no difference. I see that nVidia and DirectX drivers are causing some high latency (I might be wrong, I'm a huge noob when it comes to audio etc. but LatencyMON seems to be pointing towards nVidia and DirectX)

I tried disabling Intel Speedstep, I have no CPU throttling, I did a clean install of windows etc.
I'm really getting frustrated. Does anybody know what to do?
I'd appreciate any type of advice. Thank you very much!
Have a great day!
a b $ Windows 7
June 9, 2013 9:50:52 AM

It may be the ASUS drivers. A third party driver for Xonar and related cards claims to greatly reduce DPC latency:

http://maxedtech.com/category/uni-xonar/

Uninstall the old ASUS drivers and do a clean install with these.
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June 9, 2013 10:52:42 AM

SchizTech said:
It may be the ASUS drivers. A third party driver for Xonar and related cards claims to greatly reduce DPC latency:

http://maxedtech.com/category/uni-xonar/

Uninstall the old ASUS drivers and do a clean install with these.


As far as I'm aware those drivers don't support the Phoebus?
EDIT: They may support it, but I don't think those drivers come with the same control panel that I need to set up my 7.1 and fine tune things for my headset.
EDIT2: A few weeks ago I had a Xonar Essence STX (forgot to mention this), and I tried the UNi drivers but my latency was still the same.
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