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2666MHz
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Frequency: 2666MHz » Special Offers: Free US Shipping

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Total Capacity

512.0GB (1) 384.0GB (2) 256.0GB (1) 192.0GB (2) 128.0GB (6) 96.0GB (2) 64.0GB (9)

Form Factor

SO-DIMM (6) RDIMM (12) LRDIMM (5)

Error Correction

ECC (17) Non-ECC (6)

Registration

Registered (15) Non-Registered (8)

Item Condition

New (22) Used (1)

Special Offers

Free US Shipping (23) Garage Sale (4)

Rating

5 stars (5) 4 stars and up (11) 1 star and up (21)

Price

$150 to $200 (8) $200 to $300 (3) $300 to $400 (4) $400 to $500 (3) $500 to $750 (2) $750 to $1000 (1) $1500 to $2000 (1) More than $2000 (1)
64.0GB (2 x 32GB) OWC 2666MHz DDR4 PC4-21300 260-Pin SO-DIMM Memory Upgrade Kit

64.0GB (2 x 32GB) OWC 2666MHz DDR4 PC4-21300 260-Pin SO-DIMM Memory Upgrade Kit

Memory upgrade kit for iMac (2019-2020) and Mac mini (2018) models and PCs which utilize PC4-21300 SO-DIMM. Lifetime OWC Limited Warranty.

Reviews (444)
In Stock: Ships Same Day!

Mfr P/N: 2666DDR4S64P
OWC SKU: OWC2666DDR4S64P

 
Only
$159.97
Add to Cart
64.0GB (4 x 16GB) OWC 2666MHz DDR4 PC4-21300 260-Pin SO-DIMM Memory Upgrade Kit

64.0GB (4 x 16GB) OWC 2666MHz DDR4 PC4-21300 260-Pin SO-DIMM Memory Upgrade Kit

Memory upgrade kit for iMac (2019-2020) and Mac mini (2018) models and PCs which utilize PC4-21300 SO-DIMM. Lifetime OWC Limited Warranty.

Reviews (444)
In Stock: Ships Same Day!

Mfr P/N: 2666DDR4S64S
OWC SKU: OWC2666DDR4S64S

$179.96
Only
$154.99
Add to Cart
128.0GB (4 x 32GB) OWC 2666MHz DDR4 PC4-21300 260-Pin SO-DIMM Memory Upgrade Kit

128.0GB (4 x 32GB) OWC 2666MHz DDR4 PC4-21300 260-Pin SO-DIMM Memory Upgrade Kit

Memory upgrade kit for 27" iMac w/ Retina 5K (2019-2020) and PCs which utilize PC4-21300 SO-DIMM. Lifetime OWC Limited Warranty.

Reviews (444)
In Stock: Ships Same Day!

Mfr P/N: 2666DR4S128S
OWC SKU: OWC2666DR4S128S

 
Only
$318.99
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64.0GB (2 x 32GB) OWC 2666MHz DDR4 PC4-21300 260-Pin CL17 SO-DIMM Memory Upgrade Kit for 21.5" iMac with Retina 4K Display (2019)

64.0GB (2 x 32GB) OWC 2666MHz DDR4 PC4-21300 260-Pin CL17 SO-DIMM Memory Upgrade Kit for 21.5" iMac with Retina 4K Display (2019)

For 21.5" iMac with Retina 4K Display (2019) complete with screen adhesive and all required installation tools. Lifetime OWC Limited Warranty.

Reviews (56)
In Stock: Ships Same Day!

Mfr P/N: 2621DDR4S64K
OWC SKU: OWC2621DDR4S64K

 
Only
$174.97
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64.0GB (2 x 32GB) OWC 2666MHz DDR4 PC4-21300 260-Pin CL17 SO-DIMM Memory Upgrade Kit for 21.5" iMac with Retina 4K Display (2019)

64.0GB (2 x 32GB) OWC 2666MHz DDR4 PC4-21300 260-Pin CL17 SO-DIMM Memory Upgrade Kit for 21.5" iMac with Retina 4K Display (2019)

For 21.5" iMac with Retina 4K Display (2019). Includes adhesive for resealing the display. Lifetime OWC Limited Warranty.

Reviews (56)
In Stock: Ships Same Day!

Mfr P/N: 2621DDR4S64P
OWC SKU: OWC2621DDR4S64P

 
Only
$164.97
Add to Cart
Limited Quantity
128.0GB (2 x 64GB) OWC 2666MHz DDR4 LRDIMM PC4-21300 288-Pin CL19 Memory Upgrade Kit for iMac Pro (2017)

128.0GB (2 x 64GB) OWC 2666MHz DDR4 LRDIMM PC4-21300 288-Pin CL19 Memory Upgrade Kit for iMac Pro (2017)

Memory upgrade kit for iMac Pro (2017). Includes screen adhesive. **Requires Professional Installation** Lifetime OWC Limited Warranty.

Limited Quantity, Only 4 Left!
Be the first
In Stock: Ships Same Day!

Mfr P/N: DID2627DP128
OWC SKU: OWCDID2627DP128

$2,000.00
Only
$679.99
Add to Cart
128.0GB (4 x 32GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

128.0GB (4 x 32GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

For Mac Pro (2019) 8-Core models and other systems that utilize PC4-21300 RDIMM. Lifetime OWC Limited Warranty.

Be the first
In Stock: Ships Same Day!

Mfr P/N: 2666R3M128
OWC SKU: OWC2666R3M128

 
Only
$324.99
Add to Cart
64.0GB (4 x 16GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

64.0GB (4 x 16GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

For Mac Pro (2019) 8-Core models and other systems that utilize PC4-21300 RDIMM. Lifetime OWC Limited Warranty.

Be the first
In Stock: Ships Same Day!

Mfr P/N: 2666R1M64
OWC SKU: OWC2666R1M64

 
Only
$159.99
Add to Cart
96.0GB (2 x 32GB + 2 x 16GB) OWC 2666MHz DDR4 PC4-21300 260-Pin SO-DIMM Memory Upgrade Kit

96.0GB (2 x 32GB + 2 x 16GB) OWC 2666MHz DDR4 PC4-21300 260-Pin SO-DIMM Memory Upgrade Kit

Memory upgrade kit for 27" iMac w/ Retina 5K (2019-2020) and PCs which utilize PC4-21300 SO-DIMM. Lifetime OWC Limited Warranty.

Reviews (444)
In Stock: Ships Same Day!

Mfr P/N: 2666DDR4S96S
OWC SKU: OWC2666DDR4S96S

$269.96
Only
$238.97
Add to Cart
Limited Quantity
(*) 128.0GB OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin LRDIMM Memory Module

(*) 128.0GB OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin LRDIMM Memory Module

For Mac Pro (2019) models and other systems that utilize PC4-23400 LRDIMM. *Used, OWC Tested* 1 Year OWC Limited Warranty.

Limited Quantity, Only 2 Left!
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In Stock: Ships Same Day!

Mfr P/N: 2666D4LR128G
OWC SKU: OWC2666D4LR128U

$999.00
Only
$399.99
Add to Cart
512GB (4 x 128GB) OWC PC21300 DDR4 ECC-R 2666MHz 288-pin LRDIMM memory upgrade kit

512GB (4 x 128GB) OWC PC21300 DDR4 ECC-R 2666MHz 288-pin LRDIMM memory upgrade kit

For iMac Pro. Includes screen adhesive. **Requires Professional Installation** Lifetime OWC Limited Warranty.

Be the first
In Stock: Ships Same Day!

Mfr P/N: DID2627DS512
OWC SKU: OWCDID2627DS512

$10,400.00
Only
$2,299.99
Add to Cart
384.0GB (3 x 128GB) OWC PC21300 DDR4 2666MHz ECC Registered 288-pin LRDIMM Memory Upgrade Kit

384.0GB (3 x 128GB) OWC PC21300 DDR4 2666MHz ECC Registered 288-pin LRDIMM Memory Upgrade Kit

For iMac Pro. Includes screen adhesive. **Requires Professional Installation** Lifetime OWC Limited Warranty.

Be the first
In Stock: Ships Same Day!

Mfr P/N: DID2627DS384
OWC SKU: OWCDID2627DS384

$7,800.00
Only
$1,799.99
Add to Cart
192.0GB (12 x 16GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

192.0GB (12 x 16GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

For Mac Pro (2019) 8-Core models and other systems that utilize PC4-21300 RDIMM. Lifetime OWC Limited Warranty.

Be the first
In Stock: Ships Same Day!

Mfr P/N: 2666R1M192
OWC SKU: OWC2666R1M192

$515.88
Only
$429.99
Add to Cart
384.0GB (12 x 32GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

384.0GB (12 x 32GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

For Mac Pro (2019) 8-Core models and other systems that utilize PC4-21300 RDIMM. Lifetime OWC Limited Warranty.

Be the first
In Stock: Ships Same Day!

Mfr P/N: 2666R3M384
OWC SKU: OWC2666R3M384

$1,019.88
Only
$899.99
Add to Cart
128.0GB (8 x 16GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

128.0GB (8 x 16GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

For Mac Pro (2019) 8-Core models and other systems that utilize PC4-21300 RDIMM. Lifetime OWC Limited Warranty.

Be the first
In Stock: Ships Same Day!

Mfr P/N: 2666R1M128
OWC SKU: OWC2666R1M128

$343.92
Only
$299.99
Add to Cart
256.0GB (8 x 32GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

256.0GB (8 x 32GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

For Mac Pro (2019) 8-Core models and other systems that utilize PC4-21300 RDIMM. Lifetime OWC Limited Warranty.

Be the first
In Stock: Ships Same Day!

Mfr P/N: 2666R3M256
OWC SKU: OWC2666R3M256

 
Only
$629.99
Add to Cart
192.0GB (6 x 32GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

192.0GB (6 x 32GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

For Mac Pro (2019) 8-Core models and other systems that utilize PC4-21300 RDIMM. Lifetime OWC Limited Warranty.

Be the first
In Stock: Ships Same Day!

Mfr P/N: 2666R3M192
OWC SKU: OWC2666R3M192

 
Only
$479.99
Add to Cart
96.0GB (6 x 16GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

96.0GB (6 x 16GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

For Mac Pro (2019) 8-Core models and other systems that utilize PC4-21300 RDIMM. Lifetime OWC Limited Warranty.

Be the first
In Stock: Ships Same Day!

Mfr P/N: 2666R1M96
OWC SKU: OWC2666R1M96

$257.94
Only
$229.99
Add to Cart
64.0GB (2 x 32GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

64.0GB (2 x 32GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

For Mac Pro (2019) 8-Core models and other systems that utilize PC4-21300 RDIMM. Lifetime OWC Limited Warranty.

Be the first
In Stock: Ships Same Day!

Mfr P/N: 2666R3M64
OWC SKU: OWC2666R3M64

 
Only
$168.99
Add to Cart
64.0GB (8 x 8GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

64.0GB (8 x 8GB) OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin RDIMM Memory Upgrade Kit

For Mac Pro (2019) 8-Core models and other systems that utilize PC4-21300 RDIMM. Lifetime OWC Limited Warranty.

Be the first
In Stock: Ships Same Day!

Mfr P/N: 2666R8M64
OWC SKU: OWC2666R8M64

$199.92
Only
$159.99
Add to Cart
Limited Quantity
64.0GB OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin LRDIMM Memory Module

64.0GB OWC 2666MHz DDR4 PC4-21300 ECC 288-Pin LRDIMM Memory Module

For Mac Pro (2019) 8-core models and other systems that utilize PC4-21300 LRDIMM. Lifetime OWC Limited Warranty.

Limited Quantity, Only 15 Left!
Be the first
In Stock: Ships Same Day!

Mfr P/N: 2666D4LRE64G
OWC SKU: OWC2666D4LRE64G

$679.99
Only
$429.99
Add to Cart
128.0GB (4 x 32GB) OWC 2666MHz DDR4 RDIMM PC4-21300 288-Pin CL19 Memory Upgrade Kit for iMac Pro (2017)

128.0GB (4 x 32GB) OWC 2666MHz DDR4 RDIMM PC4-21300 288-Pin CL19 Memory Upgrade Kit for iMac Pro (2017)

Memory upgrade kit for iMac Pro (2017). Includes screen adhesive. **Requires Professional Installation** Lifetime OWC Limited Warranty.

Be the first
In Stock: Ships Same Day!

Mfr P/N: DID2627DS128
OWC SKU: OWCDID2627DS128

$2,000.00
Only
$369.99
Add to Cart
64.0GB (4 x 16GB) OWC 2666MHz DDR4 RDIMM PC4-21300 288-Pin CL19 Memory Upgrade Kit for iMac Pro (2017)

64.0GB (4 x 16GB) OWC 2666MHz DDR4 RDIMM PC4-21300 288-Pin CL19 Memory Upgrade Kit for iMac Pro (2017)

Memory upgrade kit for iMac Pro (2017). Includes screen adhesive. **Requires Professional Installation** Lifetime OWC Limited Warranty.

Be the first
In Stock: Ships Same Day!

Mfr P/N: DID2627DS64T
OWC SKU: OWCDID2627DS64T

$400.00
Only
$188.99
Add to Cart

Showing 1 - 23 of 23 items