cmp 4.1

Good afternoon friends, I need some advice from the hive mind. I have a 4.1 dual tray with a sensor problem. The tray passes the hardware test and the cMP chimes and starts as normal. However the intake, exhaust, BoostA and BoostB fans blow at full speed. It's definitely a 4,1 tray and not a...

Primary Question: What can I use as a replacement for a missing plastic tab on the 4,1 dual CPU tray's small heat-sink? (The one that is normally held down by a circular black plastic tab with a metal spring under it. See details & pics below.) Thanks. Background Details: Been having...

I own a single CPU cMP 2009 and a dual CPU cMP 2010, both working well. The older 4,1 machine has been flashed to 5,1 and both have Bootrom v144 installed. I like the case of the 4,1 machine better as it looks nicer from the outside and seems less worn from the inside, so I want to use it with...

Hi there to ALL and @tsialex , I would like to ask you for some specific unrecovered MacPro 4.1/upged to 5.1 PROBLEM I have 2 CPUs board and Iam not able to use any of 5–8 RAM slots - With tem MAC not boot or unattended shutdowns ... I realy does "everything" from 12 different 100% checked sets...

I recently re-authorized (in iTunes) my 4,1 --> flashed 5,1 High Sierra CMP and noticed an alarming phenomenon. All had been well with the machine and things looked fine after the authorization but I soon noticed that free space on my boot SSD (a 500GB Mercury Extreme Pro from OWC) had shrunk...