OWC - 64GB OWC Memory Upgrade Kit - 4 x 16GB PC21300 DDR4 2666MHz SO-DIMMs for 27-inch iMac with Retina 5K (2019-2020) and compatible PCs

£545.99 £8.53/GB

19% cheaper per GB than the average 64GB DDR4 kit we track.

Mac DDR4 Unbuffered

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Specification

Price history

Typical price (median) 90-day £561.99 12-month £561.99 12-month low £145.67 All-time low £128.33 (2023-07-08)

Modest Today’s price is 3% below this kit’s typical price for the past year, and it has been cheaper than this for 39% of that year (last on 24 Feb 2026). Why medians, not averages ›

30-day avg £561.9990-day avg £561.99180-day avg £565.31 (averages are pulled up by price spikes; the medians above are the better guide)

Cheaper per GB in the same spec

Same generation, capacity and form factor as this kit, ranked by £/GB. See all ›

	£/GB	Price	Capacity	Manufacturer	For	Type	Form Factor	ECC / Buffered	Description
	£5.31best £/GB	£340.00	64GB (4x16GB)	GLOBAL MEMORY	Mac	DDR4	SO-DIMM 2400MHz	Unbuffered	64GB (4 x 16GB) DDR4 2400MHz PC4-19200 260-PIN SODIMM MEMORY RAM KIT COMPATIBLE WITH INTEL 27" RETINA 5K IMAC (2017)Buy📈-
	£5.34	£341.76	64GB (4x16GB)	A-Tech	Mac	DDR4	SO-DIMM 2400MHz	ECCUnbuffered	A-Tech Components 64GB (4x16GB) RAM for Apple iMac 2017 27 inch Retina 5K | DDR4 2400MHz SODIMM PC4-19200 2Rx8 1.2V 260-Pin SO-DIMM Memory Upgrade KitBuy📈-
	£5.59	£358.05	64GB (4x16GB)	Timetec	Mac	DDR4	SO-DIMM 2666MHz	Non-ECCUnbuffered	Timetec 64GB KIT(4x16GB) Compatible for Apple DDR4 2666MHz for Mid 2020 iMac (20,1/20,2) / Mid 2019 iMac (19,1) 27-inch w/Retina 5K Display PC4-21333 / PC4-21300 CL19 SODIMM Memory MAC RAM UpgradeBuy📈-
	£5.62	£359.73	64GB (4x16GB)	A-Tech	Mac	DDR4	SO-DIMM 2666MHz	Non-ECCUnbuffered	A-Tech 64GB Kit (4x16GB) RAM for Apple iMac 2019 & 2020 27 inch Retina 5K | DDR4 2666 MHz SODIMM PC4-21300 / PC4-21333 260-Pin SO-DIMM Memory UpgradeBuy📈-
	£5.98	£382.55▼ 51%	64GB (2x32GB)	Timetec	Laptop	DDR4	SO-DIMM 3200MHz	Non-ECCUnbuffered	Timetec 64GB KIT(2x32GB) DDR4 3200MHz PC4-25600 Non-ECC Unbuffered 1.2V CL22 2Rx8 Dual Rank 260 Pin SODIMM Compatible with AMD and Intel Gaming Laptop Notebook PC Computer Memory RAM Module UpgradeBuy📈-
	£6.07	£388.71	64GB (2x32GB)	PNY	Laptop	DDR4	SO-DIMM 3200MHz	Non-ECCUnbuffered	PNY Performance 64GB (2x32GB) DDR4 DRAM 3200MHz (PC4-25600) CL22 1.2V Dual Rank Notebook/Laptop (SODIMM) Laptop Memory Kit - MN64GK2D43200-TBBuy📈★★★★½49

About this kit

• 64 GB (4 x 16GB) PC4-21300 DDR4, 206-pin, SO-DIMM, 1.2V, RoHS Certified, warranty safe memory upgrade
• Memory Upgrade Compatible with 2019 iMac: iMac w/Retina 5K display (27-inch Early 2019) Model ID: iMac19,1 (3.0GHz i5, 3.1GHz i5, 3.7GHz i5, 3.6GHz i9)
• Memory Upgrade Compatible with PC Laptops: Compatible with Intel / AMD Process based PCs capable with the specifications listed above. Memory complies with JEDEC Specifications
• Free technical support from our expert technicians, online installation videos available, Every module is backed by OWC Memory Lifetime Limited Warranty including the OWC Lifetime Advanced Replacement Program"

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