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About lmitche

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  1. Yes, maybe. Perhaps one could power down the Intel based GPU with a boot script and install another GPU when needed.
  2. 10 feet from the DAC connected via 5ghz WiFi to the endpoint.
  3. No, the Ryzen machine runs Roonserver, a NUC i7 is connected witelessly to the DAC. I install the GPU, do the setup and then remove it.
  4. A i7-9700kf or i9-9900kf has the advantage of no gpu. I haven't heard either, but if it's anything like what I am hearing with a Ryzen with no gpu, it's a very worthwhile upgrade. Adding a GPU card destroys the SQ with the Ryzen as well.
  5. Rando, I get it, apparently you don't have the courage of your convictions to share the details of your system here. However out of respect for others that do, you lose the right to ridicule others like StreamFidelity. Keep that in mind in the future please.
  6. Did you remove the USB stick after ram boot was complete and before playback?
  7. Rando, Best you keep mouth shut then post this utterly meaningless drivel. Have you ever heard the expression "if you don't have anything positive to say, don't say anything"? You don't offer a single specific alternative to StreamFidelity for a single one of your points. I could argue with you on almost every point above but with such a negative and useless post, I am not going to bother. Please start thinking before posting. Ask yourself what good can come from this post. Clue: in the example above the answer was nothing.
  8. Normal I/O interrupt processing in this case from the NIC port.
  9. Yes, there are controls for CPU isolation in Euphony. However, as Euphony is a closed system so it is a bit tough to know the flexibility of those controls. AL is wide open, so anything in Archlinux is easily in hand. This allows me to build configurations beyond the scope of the Euphony (and AL) menus.
  10. VRM update - There are extensive AMD bios options used to tune VRM behavior on the ASUS B450-I motherboard. It would take months to try all the settings. Nevertheless a nice SQ gain was found by disabling VRM spread spectrum and changing the VRM frequency to 500khz. This change was from "auto" settings which means that the prior values are not clear. While the SQ change was a nice bump, it wasn't as large a lift as upgrading to an LPS supply from the ATX supply.
  11. My assumption is the interrupt processing on the receiving PC with a streaming NIC port creates noise on it's own given the necessary context switch, and that is going to be a constant, EtherRegen or not. I guess one could try larger frames to see if that changes things, but that is another ball of wax. No doubt ram buffering eliminates at least a part (up to half) of this interrupt processing noise but part of it will always be there. Clearly the EtherRegen will lower the noise from other noise sources which one expects to be the majority sources of noise from the network. Larry
  12. Hi Gavin, Your theory that more VRM phases may be contribute to better sound quality may be true, but if you are using SMPS power supplies, like the stock Intel NUC supply or any ATX SMPS supply, you are working from a poor foundation. A good low ripple high transient linear power supply will have a much greater impact on SQ. The NUC you referenced, a NUC7i7DNHE, is used here daily as a Roon endpoint. It is powered by a Paul Hynes SR4. It sounds wonderful and enables enhancements to the server to pass straight through to the rest of the chain. I keep a stock Intel SMPS on hand, and the difference is night and day. Likewise a NUC I7 running from an Uptone LPS1.2 at 12 volts makes beautiful music at a reasonable price and is easily obtainable. Just lower the NUCs P1 value to 10 amps and you should be good to go. Likewise the big Super Flower low ripple ATX SMPS cannot hold a candle to the Hdplex linear power supply with it's 12 and 19 volts rails powering the CPU and Hdplex DC to DC ATX supply in the server. The difference in noise floor is instantly noticeable. The new Taiko Audio extreme machine uses a two processor Xeon motherboard with 7+1 VRM phases. It also has a killer low ripple, high transient linear power supply. Your write-up is excellent, however an image comes to mind of a proud owner extolling the virtue of the shock absorbers in his new car while he has tires filled with 10 lbs of air pressure. Many thanks for the VRM facts, as they have inspired an experiment to be conducted later today. Stay tuned, Larry P.S. BTW, the NUC referenced above runs at 400 mhz. Instruments are rendered in their full glory.
  13. The roondatabase can live on the Optane simultaneously in another partition. Poke around, the instructions for doing this were posted last year by Piero and/or Austinpop.
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