6 Best Alternatives to the OWC Memory 16GB (2026)
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The OWC Memory 16GB is a reliable DDR4 2400MHz SO-DIMM kit designed for 2017 iMac upgrades. It offers a straightforward 2x8GB configuration that meets JEDEC specifications for stable, everyday performance. You might seek owc memory 16gb alternatives if your system requires different form factors, such as standard desktop UDIMM modules, or if you need single-stick SODIMMs for laptops with limited slots. Some users may also prefer higher clock speeds or specific latency ratings that this base model does not provide.
We selected these alternatives because their published specifications overlap with the original product’s core attributes. All listed options maintain 16GB capacity and DDR4 technology, ensuring basic compatibility with systems that support this memory type. You will find variations in voltage, CAS latency, and physical dimensions across these picks. This list helps you compare specs like speed and form factor to find the right fit for your specific hardware constraints.
Our top pick: OWC 16GB DDR4 2400MHz SO-DIMM.
Comparing Alternatives to OWC 16GB
Corsair LPX 16GB 2400MHz DDR4 RAM
Corsair LPX uses standard DIMM slots, making it incompatible with the OWC SO-DIMM form factor required for your iMac. It offers tighter CL14 latency compared to the OWC kit’s unspecified timing, which benefits desktop builds where space is tight. The Corsair module is also shorter, measuring 0.39 inches high versus the OWC’s 1.02 inches. You should choose this only if you are building a desktop PC rather than upgrading a laptop or iMac. The red color adds visual flair that the plain OWC kit lacks.
Timetec 16GB DDR4 2400MHz UDIMM RAM
Timetec provides a standard UDIMM format, which does not fit the SO-DIMM slots in your iMac or most laptops. It matches the OWC’s 2400MHz speed and 1.2V voltage but specifies CL17 latency. This kit is designed for desktop towers, not compact systems. It includes Non-ECC support, similar to the OWC option. You would select this alternative only if you are upgrading a standard desktop computer. The black color and larger physical dimensions distinguish it from the smaller, portable OWC memory sticks intended for space-constrained devices.
A-Tech 16GB DDR4 2400MHz Laptop SODIMM
A-Tech offers a single 16GB stick, whereas the OWC kit contains two 8GB modules. This single-stick design saves a slot in laptops but may prevent dual-channel performance benefits available with the OWC pair. Both run at 2400MHz with CL17 latency and 1.2V. The A-Tech module is physically smaller, measuring 2.74 inches in length compared to the OWC’s 7.01 inches. Choose this if you have only one free memory slot in your laptop. The OWC kit is better if you have two slots and want balanced dual-channel speeds.
OLOy 16GB DDR4 2400MHz SODIMM
OLOy provides a single 16GB SODIMM, unlike the OWC’s two 8GB sticks. It matches the 2400MHz speed and 1.2V voltage but uses CL17 latency. The OLOy module is thinner at 0.05 inches compared to the OWC’s 1.02 inches. This single-stick approach is ideal for laptops with limited slots. However, you lose the dual-channel performance potential of the OWC kit. Select OLOy if you need a simple, single-slot upgrade for an Intel laptop. The OWC kit remains superior for systems that support dual-channel memory configurations.
A-Tech 16GB DDR4 2400MHz ECC UDIMM
This A-Tech kit includes ECC support, which the OWC kit lacks. ECC memory corrects data errors, making it suitable for servers rather than consumer iMacs or laptops. It uses standard UDIMM form factor, so it will not fit your SO-DIMM slots. Both run at 2400MHz. You should only consider this if you are building or upgrading a server environment. The OWC kit is the correct choice for consumer desktops and laptops where ECC is not supported. The server-focused design makes this option incompatible with your current hardware.
G.SKILL Trident Z RGB 16GB DDR4 RAM Kit
G.SKILL offers 3000MHz speed, significantly faster than the OWC’s 2400MHz. It also features tighter CL16 latency and runs at 1.35V. This kit uses standard UDIMM form factor, so it does not fit iMac or laptop SO-DIMM slots. It is designed for desktop PCs that support overclocking. Choose this if you are building a high-performance desktop and want faster memory. The OWC kit is the only option here compatible with 2017 iMacs. The G.SKILL module is larger and heavier, reflecting its desktop-oriented design.
Quick picks
Our 7 picks
OWC 16GB DDR4 2400MHz SO-DIMM
Best for: 2017 iMac upgrades with warranty peace of mind
- Total Capacity
- 16GB
- Memory Speed
- 2400MHz
- Voltage
- 1.2 Volts
- Module Configuration
- 2X 8GB
- Form Factor
- SO-DIMM
- ECC Support
- Non-ECC
View on Amazon: OWC 16GB DDR4 2400MHz SO-DIMM Affiliate link
This OWC kit includes two 8GB DDR4 SO-DIMM modules running at 2400MHz. It operates at 1.2 volts and meets JEDEC specifications. The design targets 2017 iMac models, including the 21.5-inch and 27-inch Retina displays. You get a lifetime limited warranty with advanced replacement support. This upgrade boosts performance for compatible Macs and select PCs.
Pros
- Two 8GB modules for 16GB total capacity
- 2400MHz DDR4 speed on 260-pin SO-DIMMs
- 1.2V low voltage operation
- Lifetime limited warranty with advanced replacement
Cons
- Limited to 2400MHz speed, lower than 3000MHz options
- Specific compatibility with 2017 iMac models
- Non-ECC memory not suitable for servers
Good fit if
- You own a 2017 iMac needing a direct upgrade
- You want a lifetime warranty with advanced replacement
- You need JEDEC-compliant memory for stability
Skip if
- You require speeds faster than 2400MHz
- You are upgrading a desktop PC with UDIMMs
- You need ECC memory for server reliability
Verdict: OWC 16GB DDR4 2400MHz SO-DIMM is the safe, compatible choice for 2017 iMac owners who prioritize warranty coverage over higher speeds. It delivers reliable performance for everyday Mac tasks without requiring complex configuration.
Corsair LPX 16GB 2400MHz DDR4 RAM
Best for: compact cases and low-latency performance
- Total Capacity
- 16GB
- Memory Speed
- 2400 MHz
- CAS Latency
- CL14
- Dimensions
- 6.1 × 3.54 × 0.39 inches
- Weight
- 3.2 ounces
View on Amazon: Corsair LPX 16GB 2400MHz DDR4 RAM Affiliate link
This Corsair LPX kit offers 16GB of DDR4 memory running at 2400MHz. It features a tight CAS latency of C14, which helps with responsiveness. The low-profile heat spreader ensures it fits in compact cases. You get a 2x8GB configuration in a red color option. This kit is designed for high-performance overclocking and broad system compatibility. It suits users who prioritize speed and fit over flashy lighting.
Pros
- Low CAS latency of C14 for faster data access
- Low-profile heat spreader fits in small form factor cases
- Designed for high-performance overclocking capabilities
- 2x8GB configuration provides balanced dual-channel performance
Cons
- No RGB lighting or aesthetic customization options
- Lower clock speed than the 3000MHz competitor
- Basic heat spreader design lacks premium cooling features
Good fit if
- You need memory that fits in a small case
- You want low latency for responsive performance
- You prefer a clean look without RGB lights
Skip if
- You require RGB lighting for your build
- You need higher clock speeds for maximum speed
- You are building a system with limited RAM slots
Verdict: Corsair LPX 16GB DDR4 2400MHz C14 is a compact, high-speed option for users who value low latency and case compatibility over visual flair. It fits best in builds where space is tight and performance is key.
Timetec 16GB DDR4 2400MHz UDIMM RAM
Best for: standard desktop PC memory upgrades
- Total Capacity
- 16GB
- Memory Speed
- 2400MHz
- CAS Latency
- CL17
- Voltage
- 1.2V
- Module Configuration
- 1x16GB
- Form Factor
- UDIMM
View on Amazon: Timetec 16GB DDR4 2400MHz UDIMM RAM Affiliate link
This Timetec module offers 16GB of DDR4 memory running at 2400MHz. It uses a standard 288-pin UDIMM form factor with a 1.2V voltage and CL17 latency. The kit is designed for desktop PCs and workstations supporting this specific memory type. It features a black PCB and dual-rank configuration. You get a plug-and-play upgrade experience backed by a limited lifetime warranty from the manufacturer.
Pros
- 16GB capacity in a single module
- 2400MHz speed with CL17 latency
- Standard 288-pin UDIMM form factor
- 1.2V operating voltage
- Limited lifetime warranty included
Cons
- Not compatible with laptop SODIMM slots
- Non-ECC memory without error correction
- Lower 2400MHz speed compared to 3000MHz alternatives
Good fit if
- You need a single 16GB stick for a desktop PC
- You require a standard UDIMM for compatibility
- You want a budget-friendly upgrade with warranty support
Skip if
- You are upgrading a laptop with SODIMM slots
- You need ECC memory for server stability
- You want speeds higher than 2400MHz
Verdict: Timetec 16GB DDR4 2400MHz Desktop RAM fits users needing a straightforward desktop upgrade with standard specifications and warranty coverage.
A-Tech 16GB DDR4 2400MHz Laptop SODIMM
Best for: laptop memory upgrades
- Total Capacity
- 16GB
- Memory Speed
- 2400 MHz
- CAS Latency
- CL17
- Voltage
- 1.2V
- Module Configuration
- 1x16GB
- Form Factor
- SODIMM
View on Amazon: A-Tech 16GB DDR4 2400MHz Laptop SODIMM Affiliate link
This A-Tech module is a single 16GB DDR4 SO-DIMM designed for laptops. It runs at 2400 MHz with CL17 latency and 1.2V voltage. The 260-pin form factor fits standard notebook slots. You get a non-ECC, unbuffered stick that boosts multitasking. It is a practical upgrade for users needing more memory in a portable device without the bulk of desktop kits.
Pros
- Single 16GB capacity simplifies installation
- 2400 MHz speed meets standard DDR4 requirements
- Low 1.2V voltage for efficiency
- Lifetime warranty included
Cons
- Single stick limits dual-channel performance
- CL17 latency is slower than some kits
- No RGB lighting or heatsink
Good fit if
- You need a single stick upgrade for a laptop
- You want a straightforward 16GB capacity
- You prefer a non-ECC memory module
Skip if
- You require dual-channel performance from two sticks
- You need higher speeds than 2400 MHz
- You are building a desktop computer
Verdict: A-Tech 16GB DDR4 2400MHz SODIMM offers a simple, single-stick upgrade for laptops. It fits users who need basic capacity expansion without complex installation or high-speed gaming performance.
OLOy 16GB DDR4 2400MHz SODIMM
Best for: Single-slot laptop memory upgrades
- Total Capacity
- 16GB
- Memory Speed
- 2400 MHz
- CAS Latency
- CL17
- Voltage
- 1.2V
- Module Configuration
- 1x16GB
- Form Factor
- SODIMM
View on Amazon: OLOy 16GB DDR4 2400MHz SODIMM Affiliate link
This is a single 16GB SODIMM stick designed for laptops. It runs at 2400MHz with CL17 latency and 1.2V voltage. The kit is compatible with Intel systems. You get a single high-capacity module rather than a dual-channel pair. It fits in standard laptop slots. This option suits users who need a simple upgrade for one slot.
Pros
- Single 16GB capacity
- 2400MHz speed
- 1.2V low voltage
- CL17 latency
- Intel compatible
Cons
- Single stick limits dual-channel performance
- 2400MHz is slower than 3000MHz options
- Only one module included
Good fit if
- You need to fill a single empty laptop slot
- You want maximum capacity in one stick
- Your laptop supports 2400MHz DDR4
Skip if
- You need dual-channel performance for gaming
- You want faster 3000MHz speeds
- Your laptop requires a specific dual-kit
Verdict: OLOy 16GB DDR4 2400MHz Laptop RAM is a solid single-stick upgrade for Intel laptops. It fits users who just need more memory in one slot without buying a pair.
A-Tech 16GB DDR4 2400MHz ECC UDIMM
Best for: Server error correction needs
- Total Capacity
- 16GB
- Memory Speed
- 2400MHz
- Module Configuration
- 1x16GB
- ECC Support
- ECC Unbuffered
- Compatible Device
- Server
- Form Factor
- UDIMM
View on Amazon: A-Tech 16GB DDR4 2400MHz ECC UDIMM Affiliate link
This is a single 16GB DDR4 module designed for server environments. It operates at 2400MHz with ECC unbuffered memory to correct data errors. The 288-pin UDIMM form factor fits standard server slots. You get reliable error correction for critical tasks. It replaces specific Hynix modules. This kit suits users who need stability over speed in a single-channel configuration.
Pros
- ECC unbuffered memory for error correction
- 2400MHz speed rating
- 288-pin UDIMM form factor
- Single 16GB module capacity
Cons
- Single stick limits bandwidth compared to dual-channel kits
- 2400MHz speed is slower than gaming options
- No XMP support for overclocking
Good fit if
- You need ECC error correction for server stability
- You are upgrading a single DIMM slot
- You require 2400MHz DDR4 compatibility
Skip if
- You need dual-channel performance for gaming
- You want speeds above 2400MHz
- You prefer RGB lighting aesthetics
Verdict: A-Tech 16GB ECC DDR4 Server RAM provides essential error correction for single-slot server upgrades. It fits users prioritizing data integrity over high-speed gaming performance.
G.SKILL Trident Z RGB 16GB DDR4 RAM Kit
Best for: Desktop users wanting 3000MHz performance
- Total Capacity
- 16GB
- Memory Speed
- 3000MT/s
- CAS Latency
- CL16
- Voltage
- 1.35V
- Module Configuration
- 2x8GB
- Form Factor
- U-DIMM
View on Amazon: G.SKILL Trident Z RGB 16GB DDR4 RAM Kit Affiliate link
This G.SKILL kit offers 16GB of DDR4 memory in a 2x8GB configuration. It runs at 3000MHz with a CL16 latency. The module requires 1.35V and supports Intel XMP for overclocking. It is a U-DIMM for desktop PCs. You get faster speeds than the 2400MHz kits on this list. The RGB lighting adds visual appeal. It suits desktop users who want higher performance than standard speeds.
Pros
- 3000MHz speed exceeds the 2400MHz alternatives
- CL16 latency for faster response times
- Intel XMP support for easy overclocking
- 1.35V operating voltage
- 2x8GB kit configuration
Cons
- Requires BIOS adjustments to reach 3000MHz
- Higher voltage than standard 1.2V modules
- No ECC support for error correction
Good fit if
- You want faster memory than 2400MHz
- You have a desktop PC with XMP support
- You prefer RGB lighting on your components
Skip if
- You need laptop SODIMM memory
- You require ECC memory for stability
- You want plug-and-play without BIOS changes
Verdict: G.SKILL Trident Z RGB 16GB DDR4-3000 delivers higher speeds and tighter latency than the other options. It fits desktop users who want to overclock for better performance.
Specifications side by side
| Spec | OWC 16GB DDR4 2400MHz SO-DIMM | Corsair LPX 16GB 2400MHz DDR4 RAM | Timetec 16GB DDR4 2400MHz UDIMM RAM | A-Tech 16GB DDR4 2400MHz Laptop SODIMM | OLOy 16GB DDR4 2400MHz SODIMM | A-Tech 16GB DDR4 2400MHz ECC UDIMM | G.SKILL Trident Z RGB 16GB DDR4 RAM Kit |
|---|---|---|---|---|---|---|---|
| Total Capacity | 16GB | 16GB | 16GB | 16GB | 16GB | 16GB | 16GB |
| Memory Speed | 2400MHz | 2400 MHz | 2400MHz | 2400 MHz | 2400 MHz | 2400MHz | 3000MT/s |
| CAS Latency | not stated | CL14 | CL17 | CL17 | CL17 | not stated | CL16 |
| Voltage | 1.2 Volts | not stated | 1.2V | 1.2V | 1.2V | not stated | 1.35V |
| Module Configuration | 2X 8GB | not stated | 1x16GB | 1x16GB | 1x16GB | 1x16GB | 2x8GB |
| Form Factor | SO-DIMM | not stated | UDIMM | SODIMM | SODIMM | not stated | U-DIMM |
| ECC Support | Non-ECC | not stated | Non-ECC | Non-ECC | not stated | ECC Unbuffered | Non-ECC |
| Height | not stated | not stated | 1.2 inches | not stated | 0.05 inches | not stated | 1.7 inches |
| Compatible Device | Mac | not stated | Desktop | Laptop | Laptop | Server | Desktop, PC |
| Size | 16GB | 16GB | 16GB | 16GB | 16GB | 16GB | 16GB |
| Dimensions | 7.01 × 5 × 1.02 inches | 6.1 × 3.54 × 0.39 inches | 5.3 × 0.2 × 1.2 inches | 2.74 × 1.18 × 0.15 inches | 5.25 × 1.22 × 0.05 inches | not stated | 5.2 × 0.67 × 1.7 inches |
| Weight | 0.81 ounces | 3.2 ounces | 1 pounds | not stated | 0.35 ounces | not stated | 4.8 ounces |
| Color | 2 x 8GB | Red | black | Multicolor | Blister | not stated | Multicolor |
| Model | OWC2400DDR4S16P | CMK16GX4M2A2400C14R | 75TT24NU2R8-8G | AT16G1D4S2400ND8N12V | MD4S162417IZSC | HMA82GU7AFR8N-UH-ATC | F4-3000C16D-16GTZR |
Frequently asked questions
Can I use the Corsair LPX 16GB in my 2017 iMac?
No, you cannot. The Corsair LPX uses standard DIMM form factors, which are physically incompatible with the SO-DIMM slots in your iMac. The OWC kit is specifically designed for that compact laptop-style slot. You need a SO-DIMM module to ensure proper fit and electrical connection in Apple desktops.
What is the difference between SODIMM and UDIMM?
SODIMM stands for Small Outline DIMM and is the smaller form factor used in laptops and compact desktops like the iMac. UDIMM is the standard, larger DIMM used in typical desktop towers. The OWC and A-Tech laptop options are SODIMMs, while the Timetec and G.SKILL kits are UDIMMs for desktops.
Is ECC memory necessary for my home computer?
ECC, or Error Correction Code, is primarily for servers and workstations that require data integrity. The A-Tech server kit includes this feature for single-slot server upgrades. Most home users do not need ECC. Standard non-ECC modules, like the Timetec or OWC options, are sufficient for everyday computing tasks.
Which RAM kit offers the highest speed for desktops?
The G.SKILL Trident Z RGB offers the highest speed at 3000MHz. It also features tighter CL16 latency and runs at 1.35V. This kit is designed for desktop users who want to overclock for better performance. All other listed options run at the standard 2400MHz JEDEC speed.
Do I need to buy two sticks of RAM for my laptop?
Not necessarily. The A-Tech and OLOy kits are single 16GB SODIMM sticks. They allow for a simple single-slot upgrade in laptops. This is useful if you only have one available memory slot or just need to double your capacity without replacing an existing stick. The OWC kit, however, is a 2x8GB pair.
What does CAS Latency (CL) indicate?
CAS Latency measures the delay in clock cycles before data is accessed. Lower numbers mean faster response times. The Corsair LPX has CL14, which is tighter than the CL17 found in the Timetec and OLOy kits. The G.SKILL kit sits in the middle with CL16. The OWC timing is unspecified.