#328 in Computer memories
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Reddit mentions of Timetec Hynix IC 32GB KIT (2x16GB) DDR4 2666MHz PC4-21300 Unbuffered Non-ECC 1.2V CL19 2Rx8 Dual Rank 260 Pin SODIMM Laptop Notebook Computer Memory RAM Module Upgrade (32GB KIT (2x16GB))
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We found 2 Reddit mentions of Timetec Hynix IC 32GB KIT (2x16GB) DDR4 2666MHz PC4-21300 Unbuffered Non-ECC 1.2V CL19 2Rx8 Dual Rank 260 Pin SODIMM Laptop Notebook Computer Memory RAM Module Upgrade (32GB KIT (2x16GB)). Here are the top ones.
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DDR4 2666MHz PC4-21300 260 Pin Unbuffered Non-ECC 1.2V CL19 Dual Rank 2Rx8 based 1024x8Power Supply: VDD=1.2V (1.14V to 1.26V) VDDQ = 1.2V (1.14V to 1.26V)Module Size: 16GB Package: 2x16GB For Laptop, Not For DesktopFor Selected Acer , Alienware , Apple , ASRock , ASUS/ASmobile , Biostar , Dell , EliteGroup (ECS) , Fujitsu , Gigabyte , HP/Compaq , Lenovo , MiTAC , MSI , QNAP , Shuttle , Supermicro , Tyan ComputersGuaranteed – Lifetime warranty from Purchase Date Free technical support (support@timetecinc.com) MON - FRI 9AM-6PM PST
Specs:
| Number of items | 2 |
| Size | Dual Rank 32GB KIT(2x16GB) |
The iMac 27" 2019 (no matter which CPU) supports up to 128 GB RAM (4 x 32 GB RAM modules). It has 4 RAM slots, meaning 4 RAM modules in total will fit in. A higher total amount than 128 GB RAM won't work due to a limitation in the logic board.
The iMac 2019 needs RAM that matches the following specification:
PC4-21300 DDR4 2666 MHz, 260-pin
Here are some examples of RAM modules that work flawlessly in the iMac 2019:
The iMac comes with 2 x 4 GB RAM modules by default, you can either keep those in and add higher capacity RAM modules to the two RAM slots which are currently empty (you can mix RAM modules of different capacity, just make sure the new RAM matches the specification outlined above), or throw the original RAM out and possibly resell it.
This video shows the RAM upgrade (very easy to do):
I bought these. They work great. 32GB (2x 16GB) 2666MHz.
https://www.amazon.com/gp/product/B07H4YBTYY/ref=ppx_yo_dt_b_asin_title_o01_s03?ie=UTF8&psc=1