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Help on Latency readings - Win 7 vs XP (with UD2H/i-540)

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In Reply to: RE: cMP - the open source high-end Memory Player posted by cics on December 30, 2007 at 04:42:01

I wonder if anyone can tell me what their DPC Latency Checker measurements were, using the UD2H, Intel i-540 and XP? I�m using this board and chip with Win 7 and the lowest readings I�m seeing from DPC are 9-10 (after tweaking the OS and BIOS). I�m trying to determine if the problem is purely the OS? Anyone who�s using the same board and chip with XP, please let me know what kind of readings you saw before or after tweaking.

Also, I don�t have a sound card installed at this point (using USB), so I�m not sure if that�s the primary reason for the high readings. Has anyone compared the latency readings with and without a Sound Card?

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RE: Help on Latency readings - Win 7 vs XP (with UD2H/i-540) - Mihaylov 13:44:47 10/19/11 (2)
Exactly the same value in Windows XP (see configuration below).I believe this is the normal value.

Serge.
http://cmp2-mihaylov.narod.ru/

My cMP2: Windows XP SP2, Gigabyte GA-H55M-UD2H, Intel Core i3-530, Corsair CM3X160C9DHX 1GB, system drive - Transcend IDE FLASH MODULE TS2GDOM40V-S, ESI Juli@, full linear PSU, NAS - WD My Book Live, iPad
- RE: Help on Latency readings - Win 7 vs XP (with UD2H/i-540) - Fork 17:01:12 10/19/11 (1)
  Hello Mihaylov,
  
  I think you may have misread the figure I mentioned. My readings are 10�s and your DPC screenshot shows 1�s, which is 10 times lower. Here's a quote from the page:
  
  "An ideal setup would show DPC latency of less than 5 �s (the case below shows consistent performance of 1-2 �s)."
  
  Am I missing something? Thanks for your time.
  
  Darin
  - RE: Help on Latency readings - Win 7 vs XP (with UD2H/i-540) - Mihaylov 17:36:16 10/19/11 (0)
    Hi!
    "An ideal setup would show DPC latency of less than 5 �s" - yes of course but not always the ideal is achievable. If value does not exceed 500 (a green line) you can be quiet - "The machine should be able to handle real-time streaming of audio data without drop-outs" - This main thing!
    Anyway in my experience the value nearby 10 are quite valid.
    
    Serge.
    http://cmp2-mihaylov.narod.ru/
    
    My cMP2: Windows XP SP2, Gigabyte GA-H55M-UD2H, Intel Core i3-530, Corsair CM3X160C9DHX 1GB, system drive - Transcend IDE FLASH MODULE TS2GDOM40V-S, ESI Juli@, full linear PSU, NAS - WD My Book Live, iPad

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