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Koka016

macrumors regular
Original poster
Aug 30, 2020
101
12
Serbia
Hi All Rumors

Again me with my curiosity :)

I have Samsung 970 EVO M.2 SSD in PCIe adapter. And in Mac pro 5.1 I have Max 1400/1500MBsec write /read speeds due to Mac pro

Pcie slot limitation. Ok I can live with this.

But when I insert the same Adapter in Magma 3T chassis I have Max 800/900MB/sec with same SSD? with Mac pro 6.1?

Can Thunderbolt 2 troughput go upper than 1000MB/sec is my question?

Any suggestion is welcome?
 

mikas

macrumors 6502a
Sep 14, 2017
890
646
Finland
Maybe change the port and try again?
There are 3 TB busses I think.
I'm not sure if this picture and it's logic is right, because there are differing testimonies about HDMI eating the bus0 bandwidth. But surely you can try it.
1637515259721.png



 

zedex

macrumors 6502
Oct 21, 2018
312
134
Perth, WA
there's a dipswitch inside the magma eb3t [on the backplane]. make sure it's set to pcie 2.0 link speeds (NOT PCIE 1.0)

ALSO - SEE EB3T MANUAL if still confused
 

mattspace

macrumors 68040
Jun 5, 2013
3,231
2,900
Australia
theoretically, you've got a maximum of PCI 3 x4 on a TB2 port, Vs PCI 2 x16 on a 5,1 slot, so your TB port has ~half the maximum bandwidth of your 5,1's x16 slots.
 
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