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Originally Posted by Timur  Guys, stop wasting your time with this. Anything below 300 us is good enough for even the smallest audio buffer settings and anything around 100 us is perfect. Yes, most XP installations can go down to 10 us, but most Vista/W7 installations are around 100+ us.
You could try to deactivate the HPET in BIOS which helped some people lower DPC to XP values, but who in his right mind wants to turn off the High Precision Event Timer when he does timing based jobs like... music!
If you are on a laptop you might have to turn off the "ACPI compliant battery control method" driver via Device-Manager, because it can create spikes up to 1000 us (=only 1 ms!) every 15 seconds.
Anything else is of no concern with readings as low as your and any drop-outs you may still be experiencing very very come from another source. Not to mention that you didn't report dropouts anyway, so why care? 
PS: If you are really serious about this you can forget about DPC Latency Checker anyway, it's just a rather simple "indication" tool. Use XPerf or LatencyMon (which is only a convinient way of using XPerf). Don't ask, google!  |
Thanks for chiming in and for your input. My only concern was to have a system which resulted less stable, I'm actually pretty content with my setup...and a <0,2 ms is not a problem at all.
I'll try out the tools you suggested.