Performance Matrix Roon Server

I would appreciate it highly if someone with a NUC i3/i5/i7 would add their performance and power figures to the spreadsheet! :slight_smile:
I just rebuilt my MOCK exorcising the AMD E-350 barebone motherboard and replacing it with a modern Asus Prime J3355I-C.
I reused everything, SSD, Internal drive and chassi. Even the memory was usable! I have, however, changed the memory for a pair of 1866Mhz DDR3L for a slight increase in performance and further lowered power consumption.
It actually started up just fine when i disabled the UEFI boot and from the ROCK GUI i reinstalled the OS. Everything still in place, full library of around 110K tracks and personal setting etc.

And, most important, the powerconsumption was basically cut in half! Very nice, but what was even better was the more than doubled performance!
Now uppsamping RedBook to DSD128 is done at almost 2x and i even tried DSD256 which works but is barely above 1x so i wouldnt rely on it. (Couldnt hear any glitches though)

So, how does a cheap low power barebone compare to a NUC?

The spreadsheet has been updated with some performance figures from my freshly built i7 8700 Coffee Lake computer. A couple of observations;

  1. The performance according to Signal path info was surprisingly low? There must be something strange goin’ on! I mean, upsampling RedBook to 192Khz on a 6core/12thread CPU must surely tax it way less than the 20x indication. I actually had almost the same figures while simultaneously ripping a Bluray to hard disk at the same time as i was compressing another Bluray movie with Handbrake!!! I can assure you that the 12 threads were burning some W!
  2. The power consumption was very much all over the place? Seems very different from older Intel chipsets consuming power at a much more even rate.

I would still like to see some figures from a Nucleus(+) or NUC!

Oh, the figures i noted in the spreadsheet were basically the same with a ROCK install on the same hardware!

not all cores are used. So a lower core but higher Mhz CPU wil perform better. My i7 4790k does the same at 42.3x.

That makes sense, but i was under the impressions that ”parallellize Delta Sigma modulator” would allow the Core to use more cores for heavy tasks?
Btw, do you know if there has been some changes to the code concerningthe processiong speed indicator?
I seem to recall reports of performance figures up in the thousand x’s?

The delta sigma modulator is used for only one task. It does not apply to all DSP.


Yes, the performance indicator was changed as the devs did not feel it was giving as useful information as it could. See:

Also, see this:

Thank you Daniel! :slight_smile: Those references were useful!

And i think i’ve figured out why the i7 8700 displays such modest figures when upsampling RedBook to either 192Khz or DSD128… It’s Windows/Intel’s way of managing processor performance! I setup the Roon Core on my HP All-In-One touchscreen PC, an i5 6500 Quad Core running @ 3.2Ghz as a default. While happily upsampling RedBook material to 192Khz the Signal Path reported some figures of about 17x which is way more than required, but when looking simultaneously at Windows Task Manager Performance Tab, i realised the CPU was running at 1.25Ghz and utilising some 3-4%. I changed to upsampling to DSD128 and the processor was running at 2.5-2.8Ghz and showing some 15-20% usage. Roon reported a Processing speed of about 6.5x which adds up!

So, this has been quite useful as an experiment and learning session. I have excellent response from anything between the Asus Prime J3355C-I ($75) and the i7 8700+Asus Prime Z370-P ($450) and can upsample one zone at a time to whatever when i feel inclined to do so. (Much more with the latter of course)

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I looked into this with my new Nucleus.
It has a modern i3 processor, don’t know how much RAM, the basic SSD (I think 128 GB?) plus my added 2 TB SSD.

Power consumption with the audio stack off, just the Nucleus idle plus a switch and some minor stuff: 14 W, not 30 W
Power consumption with a MicroRendu/LPS1, Meridian 818 + DSP8000SE on: 180 W (whether music is playing or not). Note that those speakers contain DSP, several DACs, and five 150 W amps, but the amps are class AB.
I can’t measure the power consumption of the Nucleus while processing, because my power measurement comes from my PSAudio P10, and the only way to measure the Nucleus alone is to turn everything else off, and Roon won’t play with no output available.

Roon performance indicator:
44k upsampled to 176k: 45X
44k upsampled to DSD64: 5X
44k upsampled to DSD128: 2.6X
44k upsampled to 176k + convolution with 131k taps: 18X
44k upsampled to DSD128 + convolution 131k: 2.4X

The Nucleus handles my demands well.

EDIT Correction, the Nucleus idle draws 14 W

Great input, thanks Anders!
It seems the i3 is a viable option for anyone not needing to upsample or do more than one zone at a time. And all at a very reasonable power consumption.

I measured my NUC7i5 today it has M.2 SSD for ROCK OS and second SSD for music.

This is with regular 44.1/16 no DSP

19Vdc average 0.57A (10.83W) and peak 1.5A
15Vdc average 0.69A (10.35W) and peak 2.1A
12Vdc average 0.81A (9.72W) and peak 2.8A

Average is during play to Roon endpoint. Peak was during start up.

I have not measured amp usage during a scan for example but if all cores are being used during a library scan I suppose we can see constant use high as peak is in my test.

Yes. In fact it does the highest upsampling and convolution. And I don’t play multiple zones.

Based on what Roon Labs told me, I had concluded it would be sufficient for my needs, and I always like using the least possible amount of computer power.

Tackar Fredrik! I was a bit confused at first, but later realised you can run the NUC on any voltage between the ones you mentioned?

If my math is correct you are seeing up to 30-35W while putting load on the i5 NUC. That makes sense. Are you feeding the NUC with your Paul Hynes PSU?
and are you measuring before the PSU or between PSU and NUC?

As I recall, these performance multiplier numbers are much better than I saw on my Windows i5 NUC. (I could hook it up and look…)

Is it the Linux-based Roon OS that is much more efficient than Windows?
Or a newer chip?
I bet on the OS.
@Danny ?

When i tried ROCK on my i7 8700/Asus Z370-P i saw basically the same performance figures as in Windows 10+Roon. So my bet is on the chipset/bios performing power management in my case.

Yes anything between 19-12vdc will work according to Intel but I think 19vdc is the prefered voltage.

I tried some up-sampling to DSD 64 and the amps went up with 0.10-0.15A so not much difference.

No I use my Paul Hynes SR 4 to power my SOtM SMS 200 Ultra. I have a HD Plex PSU with 4 outputs that power ISP fiberconverter with 5vdc, router with 19vdc, switch with 12vdc and finally my NUC with 19vdc.

I have a 0-32vdc 0-5A PSU that I use to test equipment with so I can se exactly how much amps it uses on the DC side.


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I have tried another Roon server, a Dell Optiplex 7010 SFF. Equipped with an SSD it performs server duties as either a Windows 10 server or as a MOCK machine.
One difference which may affect results is that in ROCK OS i mapped my NAS as storage. However, ROCK actually increases performance while lowering power consumption! :slight_smile:
And a weird effect was that it consumed less energy while upsampling to DSD128 than when upsampling to 192Khz PCM? Almost the same power consumption as when idle!

Info added to the spreadsheet!

A few NUC’s have been added to the spreadsheet for those who are curious!


Added performance and power measurements of my Macbook Pro when used as a portable Roon rig.
Used wirelessly, no hickups or disturbances even at DSD128. To be clear, the lappy was on a table in my musicroom, only attached to the charger and the music library disk. It was streaming over 5Ghz WLAN to my wired Aries G1.

I’m quite impressed with its performance actually. :slight_smile:

@support: Is there a way you can build in an opt-in/opt-out collection of performance metrics from us users, so it is easy to show how various systems are performing? It may help a lot of Roon users to decide on their hardware purchases/adjustments. Plus it may even benefit you guys too.

Me? Opt-in :slight_smile:


Added a couple of outdated MacMini’s. One Core 2 Duo 2.4Ghz (Mid 2010) and one Core i5 2.3-2.9Ghz (Mid 2011)
Both perform well, the i5 as good as any NUC I’ve tried. Both of them has had their hard drives changed to SSD, and both have 8Gb of RAM. The Core 2 Duo will struggle when upsampling to DSD128 at the same time as adding files to library and such but in general, quite okay.
They were running the latest suitable OS from Apple.

Basically, I am ready to say that the Roon Team is overly cautious when it comes to hardware recommendations. Note though, that with these MacMini, I opted for the Roon Server, not the complete GUI.

Feel free to add performance and power consumption to the spreadsheet in the first post, if you feel it could benefit someone?