Query for DDR3 and DDR4 compatibility on iMac 2019 Retina5K with 27-inch display

F5F Stay Refreshed Hardware Desktop Query for DDR3 and DDR4 compatibility on iMac 2019 Retina5K with 27-inch display

Roey09
Junior Member

09-24-2016, 03:35 PM

Hi there, I’m wondering if I can fit these 2 x DDR3 RAM sticks into my 2019 iMac. The old machine currently has EPLIDA 4GB 2x8 PC3-12800 RAM, and I’m planning to replace it with Micron 4ATF51264HZ-2G6E3 4GB DDR4 at 2667 MHz. I don’t want to risk damaging the system, so I’m curious about compatibility. The images I saw are from other people’s setups, not mine, just to show the model.

Roey09

09-24-2016, 03:35 PM #1

timmyandtimmy
Junior Member

09-25-2016, 08:41 PM

It's not possible to insert DDR3 RAM into DDR4 slots.

timmyandtimmy

09-25-2016, 08:41 PM #2

It's not possible to insert DDR3 RAM into DDR4 slots.

zKloFn
Junior Member

09-29-2016, 07:13 PM

DDR3 and DDR4 cannot be used together because the connectors and slots are different, making it impossible for the module to fit.

zKloFn

09-29-2016, 07:13 PM #3

DDR3 and DDR4 cannot be used together because the connectors and slots are different, making it impossible for the module to fit.

kungfutyla
Posting Freak

780

10-01-2016, 09:23 AM

You can't use both DDR3 and DDR4 together in the same setup. The socket wouldn't accommodate them at the same time. Some older boards let you choose one or the other, but not both simultaneously.

kungfutyla

10-01-2016, 09:23 AM #4

You can't use both DDR3 and DDR4 together in the same setup. The socket wouldn't accommodate them at the same time. Some older boards let you choose one or the other, but not both simultaneously.

itza_red_panda
Member

220

10-01-2016, 09:55 AM

Thanks to everyone for your assistance, it means a lot.

itza_red_panda

10-01-2016, 09:55 AM #5

Thanks to everyone for your assistance, it means a lot.

clem73draco
Junior Member

10-01-2016, 02:53 PM

They don't work together at all.

clem73draco

10-01-2016, 02:53 PM #6

They don't work together at all.