This article covers Timetec 16GB KIT(2x8GB) Apple DDR4 2666MHz 2020年中期 iMac (20.

Overview

Timetec's 16GB KIT (2x8GB) DDR4 memory is designed specifically for certain Apple machines: 2020 mid iMac 27-inch Retina 5K, 2019 early iMac 27-inch Retina 5K, and 2018 late Mac Mini. Running at 2666MHz with CL19 latency at 1.2V, these modules meet the PC4-21300/PC4-21333 standard and use a 260-pin SO-DIMM form factor. This kit offers a cost-effective way to boost multitasking performance in older Apple systems.
For users experiencing slowdowns with 8GB of RAM, upgrading to 16GB can dramatically reduce swapping and application lag. The kit is particularly attractive because it costs roughly half the price of Apple's own memory upgrade while delivering identical specifications. Timetec backs it with a limited lifetime warranty, adding peace of mind.
Market positioning is firmly in the budget-friendly compatible RAM segment. It's not for bleeding-edge performance, but for extending the useful life of well-maintained Apple desktop hardware.

Compatibility Guide

This memory is strictly compatible with the following Apple models:

  • iMac 27-inch Retina 5K (Mid 2020): Model ID iMac20,1 / iMac20,2 (Core i5 3.1GHz, i5 3.3GHz, i7 3.8GHz, i9 3.6GHz)
  • iMac 27-inch Retina 5K (Early 2019): Model ID iMac19,1 (Core i5 3.0GHz, i5 3.1GHz, i5 3.7GHz, i9 3.6GHz)
  • Mac Mini (Late 2018): Model ID Macmini8,1 (Core i3 3.6GHz, i5 3.0GHz, i7 3.2GHz)
    Form factor is 260-pin SO-DIMM, DDR4-2666 (PC4-21300/PC4-21333). Each machine has two memory slots; you can either fill empty slots or replace existing modules. Note that iMac 27-inch requires opening the display panel (difficult for novices), while Mac Mini 2018 allows easy access by removing the bottom cover. For best performance, always install matched pairs in dual-channel configuration.

Product Info

This kit has been available since around 2019 and continues to sell through online retailers. Price is approximately ¥24,698 as of September 2025, significantly undercutting Apple's official upgrade cost. A lifetime warranty from the manufacturer is included.
Market positioning: entry-to-mid-tier compatible RAM. Ideal for DIY-conscious users who want to breathe new life into aging Apple desktop hardware without spending a fortune.

Best Use Cases

  • Creative professionals using older iMacs: Photo editing (Lightroom, Photoshop) and video editing (Final Cut Pro) benefit greatly from more than 16GB. Adding this 16GB kit (if starting from 8GB) or using it to replace smaller modules can smooth out timeline scrubbing and reduce export times.
  • Home users with iMac or Mac Mini: Heavy browser tab usage, office suites, and basic multitasking sees significant improvement going from 8GB to 16GB. This product offers the best price-to-performance upgrade for those scenarios.
  • Mac Mini 2018 owners upgrading from 8GB: The 2018 Mac Mini is easy to upgrade, and doubling memory from 8GB to 16GB is one of the most impactful changes. This kit is a fraction of the cost of Apple's BTO option.
    Who should NOT buy this:
  • Users with M1/M2 Apple Silicon Macs (incompatible).
  • Users who need 32GB or more — consider a 32GB (2×16GB) kit instead.

Things to Consider

This memory is Apple-specific; do not attempt to use it in a Windows PC or other non-Apple devices. For iMac 27-inch, installation requires disassembling the display, which is not for the faint-hearted. If you're not comfortable performing the upgrade yourself, seek professional help. On the Mac Mini 2018, the process is straightforward.
Competitors like Crucial and Kingston offer similar Apple-compatible RAM, but Timetec is often priced lower. However, Timetec's primary sales channel in Japan is online retailers, so physical retail availability is limited. Warranty support is direct from the manufacturer and may involve English communication. While user reviews are generally positive, the absolute reliability of a third-party module may not match Apple's own parts.

FAQ

Q: Can I use this memory in a Windows PC?
A: No, this kit is designed exclusively for the listed Apple models. While it uses standard 260-pin SO-DIMM, firmware compatibility is not guaranteed on non-Apple hardware.
Q: Can I install two of these 16GB kits to get 32GB?
A: No — each machine has only two slots, so a single 16GB kit (2×8GB) fills both slots for a total of 16GB. To get 32GB, you need a kit of 2×16GB modules (different SKU).
Q: What if the Mac doesn't recognize the new memory?
A: First ensure the modules are fully seated. For iMac, power off and wait 30 seconds before restarting — sometimes the system needs a cold boot to detect new RAM. If it still doesn't work, double-check compatibility with your exact model ID and consider updating the system firmware. If all else fails, contact Timetec support (English).

Product Disclosure (Amazon)

  • Manufacturer: Timetec
  • Seller: Glob AK Connect
  • Fulfilled by: Glob AK Connect
  • ASIN: B07MH3L5MB
  • Note: This article covers a manufacturer-made product based on Amazon listing details.