Caruso is a "Single PC" but in 2 chassis.
The first includes transformers and regulation, the second the filter cells and the purely IT part.
On the IT side, and taking advantage of the feedback from the most enthusiastic members of this forum, I am now moving to dedicated server hardware:
- SuperMicro X11SSM-F motherboard
- Xéon E3-1225v6 processor
- 32 GB of RAM ECC Unbuffered Hynix
- NVMe SSD connected in PCI Express (SATA disabled) 2 times 2 TB.
- And of course JCAT, USB and Ethernet cards
The HDPLEX / JCAT boxes having been unavailable for many months, I turned to STREACOM ones.I adapted their cooling system by adding their "spacer" placed at 90 degrees.
I kill two birds with one stone by allowing the heat pipes to pass over the Ram bars and to increase the cooling capacity which, basic, is too weak for the Xeon.
The first load tests, performed with a computer power supply, proved conclusive in terms of heat dissipation.
Each JCAT card has its own regulated 5v power supply (common transformer for both)
The Processor benefits from a dedicated 12v power supply (including transformer).
The Motherboard is powered via the HDPLEX DC / ATX converter, itself powered by a dedicated 19v power supply (transformer included).
This choice, which may seem surprising, is dictated by reasons of bulk associated with the sizing of the discrete components implemented by my technician.
An implementation of this card in conditions upstream of identical philosophy (although less advanced than here) has already given excellent results.
The internal wiring is carried out by Absolue Créations (with whom I have very privileged relationships).
The connection between the two chassis is of the "military aviation" type and will only be removable on the server side.
Considering the inherent limits (in my opinion) of the connections and wiring of the very good linear power supply HDPLEX 400w; one of the aims of this project is to get rid of this type of limit.
For reasons of manufacturing delay linked to the availability of AC, the internal IT cabling will initially remain "classic". To console myself, I'd tell that this will better measure its impact.
The 4 large filter cells benefit from a Polypropylene decoupling which is located "underground", the cards being double-sided.
For each power supply, a first filtering (silver capacitors) and the regulation are placed in the box containing the transformers.
The computer unit only includes the second level of filtering to limit the risk of pollution.
The copper shields are rather there to prevent computer components from polluting these filter cells.
I specify that the adjustment of all the regulators has been made "on load" in order to take into account the losses linked to the resistivity of the wiring of the internal links.
The different levels, the dimensioning and the speed of the capacitors are provided to cope with the speed of the pulses of current draws so that the quality thereof is always optimal.
We must not forget that these capacitors are not on the path of the musical signal, so it is not necessarily necessary to stick Duelund everywhere
The two JCAT cards having different current needs, it was chosen to supply one for each.
This also allows you to still have a good margin on these 5v power supplies (at least 2 amps each) in order to be able to eventually power additional SSDs.
On Software Side, i first work with WS2016 (less process running than WS2019). Later, i'll have to test the musical contribution of WS2019.
I use FEMTO (of course!!!), but I chose to keep the minimserver layer for obvious ergonomic reasons (more than 12.000 musical works).
Minimserver is launched via Fidelizer and uses avconv encoder.
Fidelizer 8.5, Audiophile Optimizer 3 and MinorityClean XXVII are also used, but i still have to work on their settings.
Considering i own a Lampizator DAC, the Amanero USB driver settings don't allow me to exceed 100HZ on DACLINK's FEMTO setting.
On the advice of BernieK, i choosed Auslogic Bootspeed to clean the OS.
Storage is shared between the two internal SSDs, an external SSD (powered by JCAT USB card), and a NAS. So, i can compare musical quality for the same files depending of the way they are stored.
To be continued...