Need help... DOWNGRADING MacPro 5,1 -> 4,1

[eric.blair]

Whatever you will loose with Intel microcodes updates, you will regain with 5GT/s support and firmware optimisations. For almost all use cases that I know of, people have the same performance.

If you really depends on every CPU clock, I can recreate any firmware with a BootROM dump, ESN label and LBSN/MLB label.

I see. I'm using the stock GT120 video card(s) and I've got 2 Samsung EVOs on a Sonnet Tempo PCI card. I wish the firmware upgraded the SATA bays to SATAIII, hah.

Thanks

 

[ChevyNovaLN]

Yes. You have to get 0084, if you previously downloaded 10.13.0/1/2/3, you have it.

Next steps:

1) 0085 to 0084
2) 0084 to 007F

Then to the Netkas downgrader.

So, I actually have a reason to downgrade my 4,1 from 5,1 as well. I updated to 5,1 and then installed High Sierra (10.13.6) which left me at MP51.0089.B00. I have a single CPU (Quad Core 2.66ghz) and have now purchased a dual-socket upgrade with dual 2.93ghz CPU's. Nothing happens when i turn the system on when the dual socket board is installed. I thought it might be bad, but I found another post on a different forum (netkas) with the exact same issue literally posted 2 days ago with no replies yet. I need to get from 0089 back down to 007F and then downgrade to 4,1 and see if that resolves the issues.

Care to help me with that? Should I make a new post? I obviously have the 10.13.6 full installer. I wish i could find the firmware files without getting the full installers as i'm not having easy luck finding the full installers for 10.13.5, 10.13.4, etc... and i'm currently running El Capitan just because. Thankfully i never updated to Mojave which completely changes the version numbering so i think i still have a chance.

Thanks in advance,

Brian / ChevyNovaLN

 

[tsialex]

Info provide here is obsolete and unsafe, I edited all my posts.

 

[ChevyNovaLN]

Why you think that downgrade will make any difference?

MP5,1 firmware supports all 2009 CPU Trays and all supported Xeons, Nehalem and Westmere. You are searching the wrong thing.

I'm just trying to make sure that I didn't somehow receive a dead tray and the only way I feel that i'd know for sure is that i have the correct firmware for the model the tray came from. Maybe that's a moot point. I'm just assuming (maybe incorrectly) that the firmware update doesn't just update the board but maybe also the CPU tray?

Brian

 

[tsialex]

Info provide here is obsolete and unsafe, I edited all my posts.

 

[ChevyNovaLN]

Trays don't have BootROMs, just SMC firmware. Only backplanes have BootROMs. You can't upgrade anything into a CPU tray.

Even if you bought a tray that have the wrong SMC version, like a 2010/2012 one, the tray will work but with full fan RPM.

You probably received a dead tray.

Ok. That's good to know. The tray is definitely from a 4,1 (Early 2009), so if firmware is not at play then I guess i will have to lean towards sending it back as a dead item. I just feel 'dirty' sending it back when i'm not trying it in an unmolested 4,1... but it sounds like that shouldn't matter. I got concerned when I saw the other persons post/comment on netkas that is basically describing my problem with similar actions taken by both of us (only he went to Mojave and i didn't.)

Thanks for the reply, tsialex.

Brian

 

[tsialex]

Info provide here is obsolete and unsafe, I edited all my posts.