Slower Ram in L15 iMac

[rawweb]

I have 32gb of PC3-12800 1600MHz ram laying around from an older 2012 iMac. Will it work with my Late 2015 27? It requires PC3 14900 1867Mhz. Just wondering if I can use it while I wait to save up. Thanks!

 

[Samuelsan2001]

It should work fine.

 

[rawweb]

It should work fine.

Thanks, I'll give it a shot!

 

[drambuie]

PC3 (DDR3) SODIMMS will not fit in PC4 (DDR4) slots. DDR3 SODIMMS have 204 pins and DDR4 SODIMMS have 260 pins. Besides that, DDR4 runs at 1.2 volts vs 1.5 or 1.35 for DDR3.

 

[redheeler]

PC3 (DDR3) SODIMMS will not fit in PC4 (DDR4) slots. DDR3 SODIMMS have 204 pins and DDR4 SODIMMS have 260 pins. Besides that, DDR4 runs at 1.2 volts vs 1.5 or 1.35 for DDR3.

No current iMac takes DDR4 RAM, must be a typo in the OP's post. The late 2015 takes 1.35v 1867 MHz DDR3 (PC3L-14900) but slower 1600 MHz (or faster 2133 MHz) RAM should work fine.

 

[rawweb]

No current iMac takes DDR4 RAM, must be a typo in the OP's post. The late 2015 takes 1.35v 1867 MHz DDR3 (PC3L-14900) but slower 1600 MHz (or faster 2133 MHz) RAM should work fine.

Huh? According to OWC it's DDR3
https://eshop.macsales.com/shop/memory/iMac/Retina-5K2015/DDR3L

Looks like I mistyped in my OP. I'll update.