Key Features
High Capacity — 48 GB provides ample memory for heavy multitasking, virtual machines, and content work.
Fast Speed — Runs at 5600 MT/s (PC5-44800), offering high bandwidth for modern DDR5-capable laptops.
Low Voltage — Operates at 1.1 V (plus external 5 V), making it more power-efficient than older memory generations.
On-Die ECC (ODECC) — Built-in error correction at the DRAM chip level for improved data integrity, though this is not full system ECC
Voltage Regulation via PMIC — Uses an on-module power management IC for cleaner power delivery, improving stability and signal quality.
Optimized for Multitasking — DDR5 architecture has two independent 32-bit channels per module, improving parallelism and multitasking performance.
Lifetime Warranty — Comes with Crucial’s limited lifetime warranty (Micron-backed).
Technical Specification
| Specification | CT48G56C46S5 |
|---|---|
| Model Number | CT48G56C46S5 |
| Type | DDR5 SO-DIMM |
| Capacity | 48 GB |
| Speed / Data Rate | 5600 MT/s (PC5-44800) |
| CAS Latency (JEDEC) | 46-45-45 |
| Voltage | 1.1 V (module) / 5 V external |
| Pins | 262-pin SO-DIMM |
| Error Checking | On-Die ECC (Non-ECC |
Pros
Very High Capacity
48 GB in a single SO-DIMM gives a lot of memory for laptops, ideal for multitasking, VMs, and memory-intensive workloads.
Fast Speed
Runs at 5600 MT/s (PC5-44800), providing strong memory bandwidth.
Efficient Power Usage
Operates at 1.1 V using on-module voltage regulation (PMIC), giving cleaner power and better efficiency.
On-Die ECC (ODECC)
Helps improve data integrity by detecting/correcting single-bit errors within the DRAM chips.
Good for Hefty Workloads
Useful for power users: large spreadsheets, video editing, programming, virtualization, etc. Several sources mention its use-cases for “demanding software” and “heavy workloads.”
Lifetime Warranty
Backed by Crucial’s limited lifetime warranty, which provides long-term peace of mind.
Considerations
High CAS Latency
CL46-45-45 is not the lowest latency; for highly latency-sensitive tasks, this may be a trade-off.
Compatibility Risk
Not all laptops / motherboards support such a high-density SO-DIMM. Some users have reported boot issues when installing very large DDR5 modules.
Non-ECC
While it has on-die ECC, it is not a fully ECC-registered module — so for server or mission-critical use, you may want true ECC memory.
No Heat Spreader / Cooling
It has no integrated heat spreader, so in laptops with tight thermal constraints, performance under sustained load could be impacted.
Single-Module Only
As a single 48 GB stick, you may not be able to run in dual-channel mode depending on your system — check your laptop’s memory architecture.
BIOS / Firmware Requirements
Large DDR5 SO-DIMMs may require a compatible BIOS version. Some users report needing to update BIOS or tweak settings to avoid compatibility issues.
Reviews
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