Updated July 14, 2026 · 902 modules
A-Tech leads on segment $/GB; A-Tech leads on ratings. Buy live Amazon kits below — brand pages for the full catalogs.
A-Tech
$14.52/GB
DDR5 32GB $/GB
OWC
$34.27/GB
DDR5 32GB $/GB
Premium today
OWC +136%
vs A-Tech
Best buyable DDR4 and DDR5 kits by $/GB (dual-stick preferred)
A-Tech
A-Tech 256GB Kit (2x128GB) DDR5 5600MHz PC5-44800 ECC RDIMM 4Rx4 2S2Rx4 (EC8 10x4) Quad Rank 1.1V ECC Registered DIMM 288-Pin Server RAM Memory Upgrade Modules (A-Tech Enterprise Series)$795.00
Verify on Amazon.com before purchasing — checkout price applies.OWC
OWC 128GB (8x16GB) DDR5 5600 PC5-44800 CL46 1Rx8 288-pin 1.1V ECC Registered RDIMM Memory RAM Module Upgrade Kit for Select Workstations or Servers$395.00
Verify on Amazon.com before purchasing — checkout price applies.A-Tech
A-Tech 128GB Kit (2x64GB) RAM for ASRock Rack ROMED8-2T | DDR4 2133MHz PC4-17000 ECC LRDIMM 4Rx4 Load Reduced Server Memory Upgrade$420.33
Verify on Amazon.com before purchasing — checkout price applies.OWC
OWC 128GB (4 x 32GB) DDR4 ECC Registerd CL21 PC4-21300 2666MHz SDRAM Memory Ram Upgrade Module Compatible with 2019 Mac Pro 7,1 and 2017 iMac Pro 1,1 (OWC2666R3M128)$262.22
Verify on Amazon.com before purchasing — checkout price applies.Disclosure: As an Amazon Associate I earn from qualifying purchases. Rankings use price and spec data only — not paid placement. How we rank products
A-Tech leads today on both segment $/GB and ratings across 714 modules.
Segment medians preferred for $/GB (not raw catalog averages). Updated July 14, 2026.
Highest rating × review volume — for buyers comparing reliability, not just lowest price
A-Tech
A-Tech 8GB (2x4GB) DDR4 2666 MHz UDIMM PC4-21300 (PC4-2666V) CL19 DIMM Non-ECC Desktop RAM Memory Modules
$77.20
OWC
OWC 32GB (4 x 8GB) PC12800 DDR3L 1600MHz SO-DIMMs Memory Compatible with 2011-2015 iMac Models (OWC1600DDR3S32S)
$148.39
Choose A-Tech if…
Choose OWC if…
Price per GB by capacity
Apples-to-apples at each capacity tier
| Capacity | A-Tech | OWC |
|---|---|---|
| 8GB | $8.53/GB | $7.89/GB |
| 16GB | $10.07/GB | $11.38/GB |
| 32GB | $12.00/GB | $14.47/GB |
| 64GB | $12.33/GB | $15.90/GB |
| 128GB | $9.63/GB | $14.04/GB |
Capacity coverage
How many SKUs at each capacity
| Capacity | A-Tech | OWC |
|---|---|---|
| 2GB | 4 | — |
| 4GB | 32 | 3 |
| 8GB | 148 | 10 |
| 16GB | 157 | 37 |
| 32GB | 176 | 39 |
| 48GB | 1 | — |
| 64GB | 88 | 36 |
| 96GB | 11 | — |
| 128GB | 64 | 35 |
| 256GB | 31 | 23 |
| 512GB | 2 | 5 |
Speed mix & form factors
Where each brand concentrates its lineup
A-Tech speeds
OWC speeds
A-Tech DDR / form
OWC DDR / form
Answers use live segment pricing and catalog counts — updated July 14, 2026.
A-Tech leads on DDR5 32GB $/GB at $14.52/GB vs OWC at $34.27/GB (updated July 14, 2026).
A-Tech averages 4.6★ across 714 tracked modules (176 rated 4.7★+). For most buyers, prioritise dual-stick kits with the right speed for your platform — see the Amazon picks and A-Tech brand page.
OWC averages 4.4★ across 188 tracked modules (43 rated 4.7★+). Compare the most-trusted picks below and browse the OWC brand page for the full lineup.
For value, start with A-Tech on segment $/GB today. For reliability, compare average ratings (A-Tech 4.6★ vs OWC 4.4★) and the most-trusted kits on this page. Buy the Amazon kit that matches your capacity and platform.
A-Tech averages 4.6★ vs OWC's 4.4★ across their product ranges.
A-Tech offers more variety with 714 tracked modules vs OWC's 188.
Both brands offer DDR4 and DDR5 modules in DIMM and SO-DIMM form factors. Compatibility depends on memory type and speed — not the brand. Check your motherboard QVL before buying.
For gaming, prioritise DDR5-6000 CL30 (AMD AM5) or DDR5-5600–6400 (Intel). A-Tech currently leads on segment $/GB — buy a dual-stick kit from the Amazon picks above.
A-Tech has 240 SO-DIMM modules tracked; OWC has 55. Browse A-Tech or OWC brand pages, or use the RAM Finder for laptop upgrades.