RAM Compatibility for Apple iMac 27-inch (2019)
The Apple iMac 27-inch (2019) is a SODIMM Mac released in 2019. It uses DDR4 memory with 4 SO-DIMM slots, making RAM upgrades straightforward. The maximum supported RAM is 128GBGB.
Memory Specifications
| Specification | Details |
|---|---|
| Memory Type | DDR4 |
| RAM Slots | 4 SO-DIMM |
| Max Capacity | 128GBGB |
| Speed | DDR4-2666MHz MHz |
| Upgradeable | Yes |
| Form Factor | SODIMM |
Recommended RAM Upgrades
Here are our top RAM picks for the Apple iMac 27-inch (2019):
Best Overall: Crucial DDR4-3200 SODIMM 16GB (2x8GB)
Reliable, compatible, and backed by Crucial’s lifetime warranty. Fully tested for compatibility with Apple systems.
Best Value: Kingston FURY Impact DDR4-3200 32GB (2x16GB)
Excellent price-to-performance ratio with low-profile design. XMP-ready for easy overclocking support.
Storage Compatibility

The Apple iMac 27-inch (2019) supports Proprietary PCIe SSD (not user-replaceable) for storage. SATA SSDs offer speeds up to 560 MB/s, a significant improvement over traditional hard drives.
| Storage Type | Details |
|---|---|
| Storage Interface | Proprietary PCIe SSD (not user-replaceable) |
| SSD Form Factor | M.2 / 2.5″ SATA |
Recommended SSDs
Best SSD: OWC Aura Pro X2 1TB (Mac compatible)
Designed specifically for Mac systems with guaranteed compatibility.
Frequently Asked Questions
Can I upgrade the RAM in the Apple iMac 27-inch (2019)?
Yes, the Apple iMac 27-inch (2019) has 4 accessible SO-DIMM slots supporting up to 128GBGB of DDR4 memory.
What is the maximum RAM for the Apple iMac 27-inch (2019)?
The maximum supported RAM is 128GBGB of DDR4.
What type of SSD does the Apple iMac 27-inch (2019) use?
The Apple iMac 27-inch (2019) uses Proprietary PCIe SSD (not user-replaceable). A SATA SSD upgrade provides a significant speed improvement.
Recommended DDR4 Laptop RAM

Kingston Technology
Kingston Technology KCP432NS6/8 memory module 8 GB 1 x 8 GB DDR4 3200
£120.56
View Deal







