Updated July 14, 2026 · 817 modules
SK Hynix 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
SK Hynix
$5.15/GB
DDR4 32GB $/GB
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A-Tech +182%
vs SK Hynix
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.SK Hynix
KLEVV CRAS V RGB DDR5 64GB (2x32GB) 6000MHz CL30 SK Hynix A-Die 1.35V Gaming Desktop Ram Memory XMP 3.0 / AMD Expo Ready - Black (KD5BGUA80-60A300G)$872.99
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.SK Hynix
SK HYNIX 16GB 2X8GB DDR4 PC4-19200 2400MHZ 1RX8 CL17 Memory KIT HMA81GS6MFR8N-UH$125.72
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
SK Hynix is the budget pick on segment $/GB; A-Tech may win on ratings or selection.
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
SK Hynix
Hynix 8GB PC4-21300 DDR4-2666MHz 260-Pin SODIMM 1.2V Single Rank Memory Module HMA81GS6CJR8N-VK
$56.90
Choose A-Tech if…
Choose SK Hynix if…
Price per GB by capacity
Apples-to-apples at each capacity tier
| Capacity | A-Tech | SK Hynix |
|---|---|---|
| 8GB | $8.53/GB | $6.35/GB |
| 16GB | $10.07/GB | $6.76/GB |
| 32GB | $12.00/GB | $5.83/GB |
| 64GB | $12.33/GB | $7.50/GB |
| 128GB | $9.63/GB | — |
Capacity coverage
How many SKUs at each capacity
| Capacity | A-Tech | SK Hynix |
|---|---|---|
| 1GB | — | 1 |
| 2GB | 4 | 4 |
| 4GB | 32 | 16 |
| 8GB | 148 | 27 |
| 16GB | 157 | 34 |
| 32GB | 176 | 16 |
| 48GB | 1 | — |
| 64GB | 88 | 5 |
| 96GB | 11 | — |
| 128GB | 64 | — |
| 256GB | 31 | — |
| 512GB | 2 | — |
Speed mix & form factors
Where each brand concentrates its lineup
A-Tech speeds
SK Hynix speeds
A-Tech DDR / form
SK Hynix DDR / form
Answers use live segment pricing and catalog counts — updated July 14, 2026.
SK Hynix leads on DDR4 32GB $/GB at $5.15/GB vs A-Tech at $14.52/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.
SK Hynix averages 4.4★ across 103 tracked modules (36 rated 4.7★+). Compare the most-trusted picks below and browse the SK Hynix brand page for the full lineup.
For value, start with SK Hynix on segment $/GB today. For reliability, compare average ratings (A-Tech 4.6★ vs SK Hynix 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 SK Hynix's 4.4★ across their product ranges.
A-Tech offers more variety with 714 tracked modules vs SK Hynix's 103.
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). SK Hynix currently leads on segment $/GB — buy a dual-stick kit from the Amazon picks above.
A-Tech has 240 SO-DIMM modules tracked; SK Hynix has 35. Browse A-Tech or SK Hynix brand pages, or use the RAM Finder for laptop upgrades.