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HOW TO: Connect Thunderbolt devices for best performances

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1 comment

  • Robin Erard

    I have an issue about this PCI Pool selector.

    I have two Vega II DUO, so 4 BUS on them and 2 BUS with Mac I/O and top ports. So 6 Thunderbolt 3 BUS.

    I have 3 RAID HDD tower (all of them in Thunderbolt 2) and a Blackmagic 4 k extreme (connected by Thunderbolt 2 also), + 2k monitor (connected in Display port with an Thunderbolt->Display Port adapter.)

    If I connect my material as mentioned bellow. Pool B goes up to 150%... and POOL A stays at 0%, but I don't understand why.

    - Vega II Duo Number 1 BUS 0 : RAID tower Number 1
    - Vega II Duo Number 1 BUS 1 : RAID tower Number 2
    - Vega II Duo Number 2 BUS 0 : RAID tower Number 3
    - Vega II Duo Number 2 BUS 1 : Monitor 2k
    - Mac I/O : Blackmagic 4k extrem

    As I understand, everything should be right... but my POOL B exceed 100% and I can't force the Mac Pro to use POOL A... Do you know why ? Are Thunderbolt material automatically assigned to POOL B ?

    I made an other test. If I connect my material as mentioned bellow. Pool B don't exceed 100%... and POOL A stays at 0%.

    - Vega II Duo Number 1 BUS 0 : monitor 2k
    - Vega II Duo Number 2 BUS 0 : RAID tower Number 1
    - Mac I/O : RAID tower Number 2
    - Mac I/O : RAID tower Number 3
    - Top Thunderbolt PORT : Blackmagic 4k extrem

    For me it's not normal. And more strange, if I disconnect everything PCI indicator tells me that PCI cards aren't arranged in optimal configuration. (But this configuration comes from APPLE, two MPX and Mac I/O card).

    Maybe, I'm wrong on something, but I don't know about what.

    Best

    Robin

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