A-Tech 4GB
A single 4GB DDR4 2666MHz SODIMM module provides a direct, validated replacement for Synology NAS systems like the DS920+ and RS820RP+. Its unbuffered, non-ECC design and standard 1.2V operation ensure drop-in compatibility without configuration, backed by a lifetime warranty. This module is best for Synology NAS owners needing an exact, low-cost memory swap to restore a failed unit or maintain a basic 4GB configuration.
Capacity 4GB
Kit 1 x 4GB
Memory DDR4
Speed 2666 MT/s
CAS Latency CL19
Form Factor SODIMM
34 Overall Score
No current retailer price
Snapshot
Pros & Cons
Pros
- Strong social proof (75th percentile) 75th
Cons
- Below average capacity (9th percentile)
- Below average feature (18th percentile)
The proof
Performance
Specifications
Full Specifications
Memory
| Type | DDR4 |
| Form Factor | SODIMM |
| Total Capacity | 4096 |
| Modules | 1 |
| Per Module | 4096 |
| Pins | 260 |
| Rank | 1Rx16 |
Performance
| Speed | 2666 |
| CAS Latency | 19 |
| Voltage | 1.2 |
Class
| ECC | No |
| Registered | No |
Features
| Heat Spreader | No |
vs Competition
| Spec | A-Tech 4GB | Kingston FURY Beast KF564C32BWEAK2-64 | G.Skill Trident Z5 Royal Series F5-6000J2636H32GX2-TR5NG | Corsair Vengeance CMK64GX5M2B6000Z30 | Crucial Pro Overclocking CP2K16G64C32U5B | KLEVV CRAS V RGB KD5BGUA80-60A300J |
|---|---|---|---|---|---|---|
| Capacity | 4GB | 64GB | 64GB | 64GB | 32GB | 64GB |
| Kit | 1 x 4GB | 2 x 32GB | 2 x 32GB | 2 x 32GB | 2 x 16GB | 2 x 32GB |
| Memory Type | DDR4 | DDR5 | DDR5 | DDR5 | DDR5 | DDR5 |
| Speed Mts | 2666 | 6400 | 6000 | 6000 | 6400 | 6000 |
| Cas Latency | CL19 | CL32 | CL26 | CL30 | CL32 | CL30 |
| Form Factor | SODIMM | UDIMM | UDIMM | UDIMM | UDIMM | UDIMM |
| Ecc | false | false | false | false | false | false |
| Compare | Compare | Compare | Compare | Compare |
| Product | Speed | Feature | Latency | Capacity | Social Proof |
|---|---|---|---|---|---|
| A-Tech 4GB | 37.5 | 17.9 | 35.9 | 8.9 | 74.8 |
| Kingston FURY Beast KF564C32BWEAK2-64 Compare | 94.7 | 87 | 87.5 | 89.9 | 93.4 |
| G.Skill Trident Z5 Royal Series F5-6000J2636H32GX2-TR5NG Compare | 87.4 | 87 | 99.1 | 89.9 | 78.1 |
| Corsair Vengeance CMK64GX5M2B6000Z30 Compare | 87.4 | 72.9 | 87.5 | 89.9 | 93.4 |
| Crucial Pro Overclocking CP2K16G64C32U5B Compare | 94.7 | 72.9 | 87.5 | 70.9 | 87.7 |
| KLEVV CRAS V RGB KD5BGUA80-60A300J Compare | 87.4 | 87 | 87.5 | 89.9 | 87.7 |
Price
Value & Pricing
We started tracking prices for this product on Jun 20, 2026. The chart appears once we have more data.
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
