[DVA3221 loader development thread]

On 2/7/2023 at 8:22 AM, Orphée said:

You should try with a standard loader like ds3622xs+ first.

Dva3221 needs at least haswell CPU with fma3 instruction set like ds918+.

 

If ds3622xs+ loader works but ds918+ and dva3221 don't, then you cpu is probably not compatible.

 

I do not understand.

 

As shown here: https://kb.synology.com/en-me/DSM/tutorial/What_kind_of_CPU_does_my_NAS_have
The dva3221 and DS918+ have these CPUs respectively: Intel Atom C3538 and Intel Celeron J3455
and as shown in this site both CPUs do not have the FMA3 instruction set
https://www.cpu-world.com/CPUs/Atom/Intel-Atom C3538.html
https://www.cpu-world.com/CPUs/Celeron/Intel-Celeron J3455.html

 

So why are these instructions needed?

[Compatibilità scheda madre ASRock]

Sono ancora indeciso tra la Asrock J3710-ITX e Asrock j3160DC-ITX che hanno circa lo stesso prezzo.

 

La prima scheda è più veloce mentre la seconda con alimentazione DC dovrebbe consumare meno energia.

Questo perché gli alimentatori a 19v dei portatili hanno una ottima efficienza energetica come le più costose PSU tradizionali.

 

Inoltre un utente ha scritto che è riuscito a far funzionare il transcoding hardware con la scheda j3160

 

viewtopic.php?f=2&t=20216&start=700#p75928

 

Quale scheda consigliate?

[Compatibilità scheda madre ASRock]

Le schede madri Apollo Lake (J3455 e J4205) sono sconsigliate perché hanno bisogno di una modifica al kernel per funzionare bene.

 

Riporto quanto scritto qui

 

viewtopic.php?f=2&t=25986&p=85346&hilit=j3160#p85466

[Asrock Q1900-ITX/Q1900DC-ITX]

It doesn't matter. You can use a 1200W PSU and (theoretically) the energy consumption is the same as a 90W DC "power supply"

 

What it does matter, is that the PSU gives the right amount of power that the hardware needs.

 

For example, a 4x 4TB HDD with 2x DIMM RAM cards and 1x PCIe card with 2 SSDs consume 40W. If the DC power supply is 90W. So it should work just fine.

 

I found this - http://www.asrock.com/mb/Intel/Q1900DC-ITX/

"DC Adapter Saves More Energy

Compared to other counterparts, this motherboard is powered by DC adapter and able to reduce power consumption by a maximum of 50% when idle and 38% at full loading! Without traditional PSU, you can save a lot of energy and be more friendly to our environments."

 

This looks like BIG difference.

 

I think that the Seventeam ST-201MQ 200 watts used in the comparison it is not a good PSU.

This is just a commercial spot for sell the Q1900DC-ITX board.

Using a 80 Gold PSU with 88% efficiency the difference in power consumption between Q1900DC-ITX and Q1900-ITX is not much.