Howdy,
I bought a 64gb ram upgrade kit from OWC for my brand new 2020 5k iMac, 27 incher. However, strange boot issues abound when I try to install all 4 sticks at once.
2 OEM sticks and 2 empty slots = boot normally
1 OEM stick + 3 OWC sticks = boot normally
4 OWC sticks = failed boot
When the boot fails, I get only a black screen. The display doesn't power on at all, but I can hear the fan try to spin up every 30 seconds or so, but only spins for maybe 1 second and then spins down again. This process repeats until I pull the power cable. I've also tried just about every configuration to see if I have a faulty OWC stick, or a faulty RAM slot. Every OWC stick works by itself. Every RAM slot works by itself. It's just that weirdly, installing all 4 OWC sticks causes a failed boot even though no single stick is bad.
Does anyone have any thoughts as to what is causing this or a potential solution?
Thanks!
I bought a 64gb ram upgrade kit from OWC for my brand new 2020 5k iMac, 27 incher. However, strange boot issues abound when I try to install all 4 sticks at once.
2 OEM sticks and 2 empty slots = boot normally
1 OEM stick + 3 OWC sticks = boot normally
4 OWC sticks = failed boot
When the boot fails, I get only a black screen. The display doesn't power on at all, but I can hear the fan try to spin up every 30 seconds or so, but only spins for maybe 1 second and then spins down again. This process repeats until I pull the power cable. I've also tried just about every configuration to see if I have a faulty OWC stick, or a faulty RAM slot. Every OWC stick works by itself. Every RAM slot works by itself. It's just that weirdly, installing all 4 OWC sticks causes a failed boot even though no single stick is bad.
Does anyone have any thoughts as to what is causing this or a potential solution?
Thanks!