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Everything posted by OAudio

  1. Peter hi, Agreed, I would go with: optimised sound quality first, then component compatibility, manufacture, and ease of build. I think for optimised sound quality you might want to think about some research. I use active cooling at the moment, but this is only to eliminate thermal considerations whilst developing my server (no impact on sound quality). Passive cooling is coming in time which I have looked at for the C620 series. I am not going into details of the research here but it may help to know that the cooling design, even the passive approach you are loo
  2. I may start a separate thread. Neons build is following a different and interesting route so I think it would get confusing and unfair to get into detail here.
  3. I'm reading up in the background to try to come up to speed a bit with the AMD stuff :-) HPET discussed in the the linked article and TSC are event timers (circa 1ms upwards) that are referenced to a physical oscillator (either PCH attached for Intel or internal to the CPU for AMD). So I get that this is CPU attached in your system. If I understand, I guess your saying that in your system PCIe attached devices (USB and Network) are direct channels to the CPU, you have no storage attached via PCH Sata as well and the TSC timer is integrated onto the processor. Very neat
  4. I looked at specs of the versions of the c620 series at the time the platform was released. I tend to go with the principle that it good not to add things you don't need. The attached table summarises the differences in the family moving from the C621 to C629. The going from c621 to 622 adds 2x10G network and 8x PCIe uplink to the C621 capability, but I don’t need them so C621 was selected to avoid unused PCH complexity. As a side point I have also not had good SQ experience with 10G network cards for various reasons so this was another reason for going with the c621. Having said a
  5. I think this may be a misleading assumption about the role of the PCH. What the PCH does is essential for sound quality and one of the key limiting / enabling factors in the quality of audio achieved by an Audio Server. This is regardless of the route chosen for USB and network connections (eg by On chip PCH or by PCIe expansion cards). To illustrate the point, I would suggest that pretty much one of the first sub-systems to look at when selecting a motherboard is the clock subsystem of motherboards PCH architecture. In most of the more recent PCH designs for, Intel at
  6. Apologies for the post above, hit return before it was completed. This is the post as intended. These costs and the price of this server make me smile. I say this with real insight in the area, I have been developing a C621 Intel scalable processor system >3 years now (actually 7 years if you include the research on other audio servers that lead up to this c621 development). The C621 server development has taken a long time because the decision was taken to research and develop key components from scratch where I wasn't happy with the design / soun
  7. I have been working on a C621 intel scalable processor system for about 3 years now. This is emphatically not a
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