MP 1,1-5,1 Where the boot ROM belongs?

[tampano]

In the process of swapping processor trays between my original single to a double.

My machine has 144.0.0.0.0 - i updated it but i'm using High Sierra so far. I have a RX580 and I already installed Mojave on a partition. All good. Just don't need it now

The double processor one as MP51.0089.B00. Will run on High Sierra with an old Nvidia GTX960.

My question is: do I need to update this last machine to 144.0.0.0.0 before using the dual processor tray on my original Mac Pro? And, reversed, will the second machine have trouble if I use my original single processor tray?

I know the short answer could be swap machines completely...but one is mine and the second goes to a friend. So, aside of all the stuff i should move, it's also a silly "emotional" decision

Hope the technical side makes sense.

Thanks

 

[tsialex]

In the process of swapping processor trays between my original single to a double.

My machine has 144.0.0.0.0 - i updated it but i'm using High Sierra so far. I have a RX580 and I already installed Mojave on a partition. All good. Just don't need it now

The double processor one as MP51.0089.B00. Will run on High Sierra with an old Nvidia GTX960.

My question is: do I need to update this last machine to 144.0.0.0.0 before using the dual processor tray on my original Mac Pro? And, reversed, will the second machine have trouble if I use my original single processor tray?

I know the short answer could be swap machines completely...but one is mine and the second goes to a friend. So, aside of all the stuff i should move, it's also a silly "emotional" decision

Hope the technical side makes sense.

Thanks

BootROM is stored on the backplane.

Trays don't have BootROMs, just the SMC firmware, and work with any BootROM release your backplane has. Trays are independent from the BootROM.

Obviously, an early-2009 tray don't work with a mid-2010/mid-2012 backplane, since the SMC firmware version on the micro controller is not the same and can't be upgraded.

An early-2009 tray has the SMC version 1.39f5, while a mid-2010/mid-2012 has the 1.39f11 version, and has to be an identical match between the tray SMC version and the backplane SMC.

A SMC version mismatch causes the fans to work full time at full RPM, SMC fail-safe mode. Your Mac Pro boots, but it's like being side by side a jet engine.

 

[tampano]

Thanks a lot.

SMC versions are identical, machines are both 5.1, I checked the serial number before buying the second one on eBay.

So now I know I can use the dual tray on mine without going around the whole fuss of upgrading to 144.0.0.0.0. It was not a major thing but I wanted to be sure before starting swapping graphic cards and so on.

Thanks again

 

[tsialex]

Thanks a lot.

SMC versions are identical, machines are both 5.1, I checked the serial number before buying the second one on eBay.

So now I know I can use the dual tray on mine without going around the whole fuss of upgrading to 144.0.0.0.0. It was not a major thing but I wanted to be sure before starting swapping graphic cards and so on.

Thanks again

Upgrade all your Macs to the current release, 144.0.0.0.0. Previous versions have several bugs and anything earlier than MP51.0089.B00 has the flawed Intel microcodes that are vulnerable to Spectre and Meltdown. APFS support of earlier versions are seriously problematic too.

No one should use a BootROM release earlier than 144.0.0.0.0.

Read the first post of the thread:

MP5,1: What you have to do to upgrade to Mojave (BootROM upgrade instructions thread)

Please fully read this first post, you will probably find that you have one or more problems described into the various notes below. Mojave will only install if you have upgraded your BootROM to the current release and your Mac Pro have a Metal capable GPU*. If you are trying to install Mojave...

forums.macrumors.com

 

[tampano]

True. Makes perfect sense. I will