MP 1,1-5,1 Mac pro 4,1/5,1 issues

[FirewireFreak400]

Hi, i am new to this forum so if i did anything wrong correct me please.

So i got a Mac pro 4,1 flashed to 5,1 and its been running mac os monterey with martin lo's opencore since i got it a year ago and its been running very smoothly with a rx 580 and 32gb ecc ddr3 ram and 1 xeon x5690 but there are some issues.

First of all: the fans, if i turn on the computer then the fans ramp up for 1 minute or so and calm down, this happens when the os is booted and on the login screen not when i initially turn on the computer or if the opencore screen shows. Can i fix this with maybe an opencore config or removing something because i had installed that boot screen driver for all other non efi compatible cards and cleared the rom chip. and as far as i know it has nothing to do with opencore because when i pull my opencore drive with monterey out and use only my mojave drive it does exactly the same thing: fans ramp up when booted into the os and after 1 minute or so calm down. So i suspect it is a hardware or software issue. So if anyone knows a fix for this please let me know!

2nd thing is that my mac pro takes long to chime after the powerbutton is clicked. Is this normal with these mac pros or does it have something to do with opencore or what?

(I am not natively english so if i had written anything wrong you know why)

Thanks,

FirewireFreak400

 

[tsialex]

Hi, i am new to this forum so if i did anything wrong correct me please.

So i got a Mac pro 4,1 flashed to 5,1 and its been running mac os monterey with martin lo's opencore since i got it a year ago and its been running very smoothly with a rx 580 and 32gb ecc ddr3 ram and 1 xeon x5690 but there are some issues.

First of all: the fans, if i turn on the computer then the fans ramp up for 1 minute or so and calm down, this happens when the os is booted and on the login screen not when i initially turn on the computer or if the opencore screen shows. Can i fix this with maybe an opencore config or removing something because i had installed that boot screen driver for all other non efi compatible cards and cleared the rom chip. and as far as i know it has nothing to do with opencore because when i pull my opencore drive with monterey out and use only my mojave drive it does exactly the same thing: fans ramp up when booted into the os and after 1 minute or so calm down. So i suspect it is a hardware or software issue. So if anyone knows a fix for this please let me know!

Usual and expected behaviour of cross-flashed early-2009s, search for "PCIe racing fan" thread here on the Mac Pro forum.

The cause is a bug in the early-2009 1.39f5 SMC firmware, which is not upgradeable (unless you remove two 144-pins microcontrollers from a mid-2010/2012, from the backplane and CPU-tray, and install to the early-2009).

Mid-2010 and mid-2012 Mac Pros instead have the 1.39f11 SMC firmware version and the PCIe racing fan was corrected with these.

2nd thing is that my mac pro takes long to chime after the powerbutton is clicked. Is this normal with these mac pros or does it have something to do with opencore or what?

(I am not natively english so if i had written anything wrong you know why)

Thanks,

FirewireFreak400

The main reason for the POST to take to long with a healthy MacPro5,1 is that the Mac Pro firmware validates the whole RAM during POST; consequently, the POST process is "fast" when low amount of memory is installed, but the time increases as the amount of installed RAM grows. Also UDIMMs are faster to validate at POST than RDIMMs.

Another factor that extends POST time is the presence of additional drives or PCIe cards, although the impact is not as drastic as that of the RAM. NVMe drives also increase the POST time, takes much more time to enumerate all possible NVMe devices than the six possible SATA devices.

There are another causes for POST time to take too long, but now are issues that need correction so it is worth checking for these as well:

• RTC BR2032 battery being spent is also a major cause for POST to take too much time.
• faulty/dying SATA drives can hang the SATA controller and cause serious slowness at POST - the DVD writer is one known to cause it and being frequently overlooked.
• disconnected fans, defective fans, disconnected sensors, bad connections.

Usually AHT or ASD catch these easily.

 

[FirewireFreak400]

Usually AHT or ASD catch these easily.

What is AHT or ASD? Are these some kind of tools or what?

 

[tsialex]

What is AHT or ASD? Are these some kind of tools or what?

Video Card Recommendation for Mac Pro 5,1 in 2024

Yes, Apple Hardware Test - AHT. Apple Hardware Test/Apple Service Diagnostics - AHT/ASD: You need to run AHT and to be sure that you don't have any hardware issues. You'll need an Apple OEM GPU with 64bit EFI (HD 2600XT, 8800GT, Quadro FX 5600, GT120, HD 4870/5770/5870) to run AHT/ASD. While...

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