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Yes Asrock AD525PV3 is much better

Hi JackWong, yes, the AD525PV3 is sounding much better!
I'm very happy, and even more happy when i think about implementing your hw-tweaks on bypassing caps and dedicated DRAM-psu!!!

Same setup for both AD525PV3 and GA-H55M-USB3 boards:
- minimal nLite install, MPS-Multiprocessor
- AWE
- minlogon
- boot.ini tweaked as per steppes mem=256
No hardware tweaks (only Juli@ has dedicated psu)
Edit: yes 1 difference in HW setup: AD525 runs on 30GB-SSD (40 cd's stored), h55m has 120GB-SSD (80 cd's stored). I'll check effect on sq in next weeks.
Edit 2: after comparing 30GB and 120GB SSD's in AD525PV3: subtle difference in favour of 30GB SSD. Conclusion: AD525PV3 beats H55M-USB3 with ease.

AD525PV3 provides more detail, more musical. I really heared some new details. In multi-voice songs the location of the singers is better, more subtle.
And it needs less power: h55m could run 6 hours on SLA-batteries, AD525pv3 sings 10 hours.

Nice thing is, there is only one cpu power phase. Simple design, less switching, more constant power-draw (i think but not sure - i'm sure about the SQ though). Easy to tweak/bypass with sikorel-Wima combo's.

Other nice thing is the Rcomp control in bios. Playing with these settings can provide different optimum-settings for instrumental / sing-a-song / classical. Three different bios settings can be stored in bios (like the h55m).

So if one could do with 88.2/96 upsampling or less, one should definitely try the ad525pv3. I'll keep the h55m for future use in a roomcorrection setup.

Of course i'm still very interested in your h55m-usb3 development. We have a shared reference now (untweaked h55m-usb3). During the next weeks, after burning in, i'll do another A-B test (ad525-h55m) and report.

Question: Could you have a look at the 2nd picture in
http://www.audioasylum.com/forums/pcaudio/messages/9/98866.html
Top left corner: between sound-chip and pci-slot, you can see a tiny black smd-souldered 'thing'. There is another right next to it (in the picture it's hidden behind the pci-slot). Could this be the choke for powering sound-chip? So if i remove it i disable the sound-chip?
Is it the same thing as you described in http://www.audioasylum.com/forums/pcaudio/messages/9/98886.html ?

Besides that i can't wait until your next post on DRAM-psu!!

Cheers!
Douwe



Edits: 12/21/11 12/21/11

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