BTW I have problem with enabling pcie 2.0 x16 on slot 2.
I used this guide https://docs.google.com/document/d/...NU7m-mDBLAWWJipyM/edit#heading=h.v4727xejik0y
and made a mistake, i ran fast.sh with 00:00 , 00:01 , 00:05 , 00:09 parameters.
two of them updated.
I had no internet connection on mp that time, so I had a mistake with this action.
then I connected to internet and downloaded pci ids.
00:00 is host bridge memory controllet hub
00:01 - 00:09 are PCI bridge ... PCIE Express port 1 - 9
my gpu is 02:00
and my nvme adapter is 01:00
01:00.0 Non-Volatile memory controller: Samsung .......
When I ran fast.sh 01:00 I get output: Final PCIe 1.0 x4
System report also tells that slot 2 is x4 with 2.5GT/s link speed.
How can I enable PCIE 2.0 x16 on my slot 2?
please help
my ssd speed is 800mb/s now, I want to achieve 1500mb/s
used this guide https://forums.macrumors.com/thread...4-ssds-5900-mb-s.1936311/page-9#post-25247002
and got message
Before: PCIe 1.0 x4
After: PCIe 2.0 x4
then I edited script to display current settings only
rebooted mac pro and get Before: PCIe 1.0 x4 again....
is it possible to make it permanent?
Would you please take this to a different, more appropriate thread. This thread IS NOT about NVME booting on cMP31. It’s about BootROM 144.0.0.0.0.
More important to anything, it's not about MP3,1 at all…
P.S.:
If anyone can't read between the lines, I'm totally against MP3,1 APFS/NVMe injection with the current tools and I'm not going to make it easy for people brick logic boards.
Since I got a DM asking why I'm against MP3,1 APFS/NVMe injection, it's all about the risk/benefit.
MP3,1 never got the equivalent of 138.0.0.0.0 BootROM, that makes the default state of PCIe 16x slots 2.0 instead of the default 1.0. So, even if you get APFS/NVMe correctly working, you still have PCIe 1.0 x4 speeds until you reconfigure the PCIe 16x slot to PCIe 2.0 using pciutils for the session - it's not permanent. Every time you reboot, you have to reconfigure.
All the risk of bricking that I already explained multiple times, for ~700MB/s.
okey, discussion is here now: https://forums.macrumors.com/threads/mac-pro-3-1-nvme-support-upgrade-guide-questions.2194878/