Crucial Classic 8 GB (1 x 8 GB) DDR5-5600 CL46 Memory vs Crucial CT25664AA667 2 GB (1 x 2 GB) DDR2-667 CL5 Memory
Side-by-side memory specifications, price freshness, and neutral decision guidance to help you carry the right part into your PC build.
Specification profile
Each spec is scaled as a % of the leader in your selection - so even the runner-up stays visible on the chart.
Key specs at a glance
Top 4 specs that matter most. Full spec-by-spec breakdown is in the table below.
Performance
Memory
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| Component | $29.99 Continue with this part Keep it selected while you complete the rest of the PC. | $15.49 Checked 8/24/2026, 12:08:15 PM Continue with this part Keep it selected while you complete the rest of the PC. |
|---|---|---|
| Performance | ||
| Speed | 5600 MHz | 667 MHz |
| CAS Latency | 46 cycles | 5 cycles |
| First Word Latency | 16.429 ns | 14.993 ns |
| Memory | ||
| Capacity | 8 GB | 2 GB |
| Power | ||
| Voltage | 1.1 V | 1.8 V |
| Physical | ||
| Form Factor | DDR5 | DDR2 |
| Build | ||
| Color | Black | Green |
| Other | ||
| Price Updated At | - | 2026-08-24T12:08:15.836+00:00 |
Common questions
How should I choose between these memorys?v
Start with the specifications that matter for your workload, then review power, physical fit, platform, and connectivity tradeoffs. PC Launchpad highlights only direct, verifiable specification differences and does not declare a universal winner.
Can I mix any of these memorys with the rest of my parts?v
PC Launchpad's Guided Builder checks compatibility across every component automatically. Click "Use in Build" on any option above and the builder will flag socket, form-factor, wattage, or clearance issues before you check out.
Where are the prices from?v
Prices come from Amazon availability, which PC Launchpad updates regularly. If a component is out of stock or prices change, the comparison may not reflect the latest number - always confirm on the retailer page before you buy.
Is the Crucial Classic 8 GB (1 x 8 GB) DDR5-5600 CL46 Memory better than the Crucial CT25664AA667 2 GB (1 x 2 GB) DDR2-667 CL5 Memory?v
It depends on the workload. Use the chart summary above for the quick read, then look at the spec-by-spec breakdown to see which individual metrics favor which part. Verifiable numeric winners are emphasized only when the data has a clear direction, such as higher capacity or lower latency.
Which one is better value - the Crucial Classic 8 GB (1 x 8 GB) DDR5-5600 CL46 Memory or the Crucial CT25664AA667 2 GB (1 x 2 GB) DDR2-667 CL5 Memory?v
Value depends on your workload and the rest of the build. Compare the specifications you will actually use, then confirm the current retailer price before purchasing; PC Launchpad does not infer benchmark performance from catalog specifications.