--- product_id: 121986965 title: "OWC 128GB (4 x 32GB) PC21300 DDR4 2666MHz 260pin SO-DIMMs Memory Ram Upgrade Compatible with 27 iMac w/Retina 5K (Early 2019 and up) and Compatible PCs (OWC2666DR4S128S)" brand: "owc" price: "VT450229" currency: VUV in_stock: true url: https://www.desertcart.vu/products/121986965-owc-128gb-4-x-32gb-pc21300-ddr4-2666mhz-260pin-dimms store_origin: VU region: Vanuatu --- # 128GB RAM 2666MHz speed Lifetime warranty OWC 128GB (4 x 32GB) PC21300 DDR4 2666MHz 260pin SO-DIMMs Memory Ram Upgrade Compatible with 27 iMac w/Retina 5K (Early 2019 and up) and Compatible PCs (OWC2666DR4S128S) **Brand:** owc **Price:** VT450229 **Availability:** ✅ In Stock ## Summary > 🚀 Elevate Your Tech Game with OWC RAM! ## Quick Answers - **What is this?** OWC 128GB (4 x 32GB) PC21300 DDR4 2666MHz 260pin SO-DIMMs Memory Ram Upgrade Compatible with 27 iMac w/Retina 5K (Early 2019 and up) and Compatible PCs (OWC2666DR4S128S) by owc - **How much does it cost?** VT450229 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/121986965-owc-128gb-4-x-32gb-pc21300-ddr4-2666mhz-260pin-dimms) ## Best For - owc enthusiasts ## Why This Product - Trusted owc brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Eco-Friendly Choice:** ROHS compliant, ensuring a greener upgrade for your tech. - • **Seamless Compatibility:** Perfectly fits 27" iMac Retina 5K (2019+) and a range of PCs. - • **Speed Meets Efficiency:** Experience lightning-fast 2666MHz speeds for all your multitasking needs. - • **Future-Proof Your Setup:** Stay ahead with industry-leading tech support and lifetime warranty. - • **Upgrade Your Performance:** Transform your iMac or PC with a massive 128GB DDR4 RAM boost! ## Overview The OWC 128GB (4 x 32GB) PC21300 DDR4 2666MHz SO-DIMMs Memory RAM Upgrade is designed for 27" iMacs with Retina 5K displays (2019 and later) and compatible PCs. This upgrade offers a significant performance boost with its high-speed DDR4 technology, ensuring seamless multitasking and enhanced productivity. Backed by a lifetime warranty and advanced replacement program, this memory upgrade is both reliable and eco-friendly. ## Description OWC 128GB (4 x 32GB) PC21300 DDR4 2666MHz 260pin SO-DIMMs Memory Ram Upgrade Compatible with 27 iMac w/Retina 5K (Early 2019 and up) and Compatible PCs (OWC2666DR4S128S) ## Features - OWC 256.0GB UPGRADE: Consists of Four 32GB DDR4 2666MHz PC4-21300 CL19 SO-DIMMs 1.2V 260-pin Memory Module Fully compliant with JEDEC specifications, ROHS compliant, warranty safe upgrade; Backed by OWC Memory Lifetime Limited Warranty including the OWC Lifetime Advanced Replacement Program - COMPATIBLE WITH: 2020 iMac: iMac w/Retina 5K display (27 inch mid 2020) Model ID: iMac20,1 and iMac20,2 (3.1GHz i5, 3.3GHz i5, 3.8GHz i7, 3.6GHz i9) - 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) Models: MRQY2LL/A, MRR02LL/A, MRR12LL/A - PC COMPATIBLE WITH: works with compatible gaming laptops and PC desktops: Dell, HP , Toshiba, ASUS, Acer, Supermicro, Fujitsu, Gigabyte, Intel, Lenovo, LG, Samsung, Sony, Supermicro - COMPATIBLE PART NUMBERS: CT2K32G4S266M, CT32G4S266M, KCP426SD8/32, CT32G4SFD8266, HMAA4GS6AJR8N-VK, M471A4G43MB1‐CTD, MUQQ2G/A - INDUSTRY LEADING: Consumer Friendly Advanced Replacement Program and Limited Lifetime Warranty, which Includes Free Tech Support by Other World Computing ## Technical Specifications | Specification | Value | |---------------|-------| | RAM | 128 GB DDR4 | | Brand | OWC | | Series | OWC2666DR4S128S | | Item model number | 2666DR4S128S | | Item Weight | 2.08 ounces | | Product Dimensions | 6.26 x 4.25 x 0.28 inches | | Item Dimensions LxWxH | 6.26 x 4.25 x 0.28 inches | | Color | 4 x 32GB | | Computer Memory Type | DDR4 SDRAM | | Voltage | 1.2 Volts | | Manufacturer | Other World Computing | | ASIN | B07QD13Y17 | | Country of Origin | Taiwan | | Date First Available | April 3, 2019 | ## Product Details - **Brand:** OWC - **Computer Memory Size:** 128 GB - **RAM Memory Technology:** DDR4 - **Memory Speed:** 1333 MHz - **Compatible Devices:** Desktop ## Images ![OWC 128GB (4 x 32GB) PC21300 DDR4 2666MHz 260pin SO-DIMMs Memory Ram Upgrade Compatible with 27 iMac w/Retina 5K (Early 2019 and up) and Compatible PCs (OWC2666DR4S128S) - Image 1](https://m.media-amazon.com/images/I/611Wxtwj6fL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: Will this work on the 2019 imac 3.6ghz 8-core 9th gen intel core i9?** A: I see a lot of bad info on mixing the ram. Yes you can mix it, BUT you need to put the new ram in slots 1&2 OR 3&4 if you want to keep it running at 2666mhz. Easy to confirm by just going to your System Information app, then under "Hardware" is "Memory" it will show you which slot each stick is in AND its clock speed. If you alternate like many people say, it still works, but is slowed to 2133mhz. I've tried it all 3 ways on my 2020 iMac and currently left the 16gb sticks in 3 & 4 with the original Mac 4Gb sticks in 1 & 2. **Q: Will it work on 2020 imac 27 inch retina 5k display with 3.6 ghz 10 core 10th generation intel i9 processor?** A: Hi, I have the same mac 10-core intel core i9 Did it work on you? Mine says 2667 Mhz DDR4 Is this one ok even its only 2666 Mhz? **Q: Will this memory work in the 2019 iMac w/Retina 5k?** A: Hello. This will work in the 2019 iMac model. **Q: es compatible con acer predator 17** A: Look it up on google to be sure. ## Frequently Bought Together - OWC 128GB (4 x 32GB) PC21300 DDR4 2666MHz 260pin SO-DIMMs Memory Ram Upgrade Compatible with 27" iMac w/Retina 5K (Early 2019 and up) and Compatible PCs (OWC2666DR4S128S) - 2020 Apple iMac with Retina 5K Display (27-inch, 8GB RAM, 512GB SSD Storage) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vu/products/121986965-owc-128gb-4-x-32gb-pc21300-ddr4-2666mhz-260pin-dimms](https://www.desertcart.vu/products/121986965-owc-128gb-4-x-32gb-pc21300-ddr4-2666mhz-260pin-dimms) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-07*