CL19 or CL22 DDR4 RAMS? Compared by Specs
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You are comparing CL19 vs CL22 ddr4 RAM options for different system needs. Both kits use 1.2V voltage, but they serve distinct hardware categories. Product A is a server-grade RDIMM with lower latency, while Product B is a laptop SODIMM with higher speed ratings. You need to match the form factor and capacity to your device before judging the timing differences.
Key differences
| Aspect | Crucial 64GB (2x32GB) 2666MHz DDR4 RDIMM | G.SKILL Ripjaws 16GB DDR4 3200MHz SODIMM Laptop RAM |
|---|---|---|
| Form Factor | 288-Pin RDIMM | 260-Pin SO-DIMM |
| Capacity | 64GB (2x32GB) | 16GB (2x8GB) |
| Memory Speed | 2666 MT/s | 3200 MT/s |
| CAS Latency | CL19 | CL22 |
| ECC Support | ECC, Registered | Non-ECC |
| Compatible Device | Desktop/Server | Laptop/Notebook |
Which one should you choose?
Choose Crucial 64GB (2x32GB) 2666MHz DDR4 RDIMM if
- You need high capacity for server or workstation tasks.
- You require ECC registered memory for data integrity.
- You prefer lower CAS latency on a compatible platform.
Choose G.SKILL Ripjaws 16GB DDR4 3200MHz SODIMM Laptop RAM if
- You are upgrading a laptop or notebook.
- You need smaller SO-DIMM modules that fit portable devices.
- You want higher rated transfer speeds for mobile use.
Verdict: These kits target completely different devices, so direct performance comparison is limited by hardware compatibility. Choose the Crucial kit for desktop server applications requiring large memory and error correction. Choose the G.SKILL kit if you are building or upgrading a laptop where physical form factor is the deciding constraint.
CL19 vs CL22 DDR4 RAM Specs
cas latency
Product A features a CAS Latency of CL19, while Product B operates at CL22. Lower latency numbers indicate faster response times for data retrieval from the memory modules. This means Product A can access stored information slightly quicker than Product B when the system requests specific data. For tasks sensitive to timing delays, such as certain database operations or high-frequency trading applications, the lower CL19 rating provides a tangible performance benefit. Product B's CL22 is standard for its class, but it does not match the snappier response of the Crucial kit in this specific timing metric.
memory speed
Product B offers a higher memory speed rating of 3200 MT/s compared to Product A's 2666 MT/s. This difference indicates that Product B can transfer data between the memory and the processor at a faster rate. For users prioritizing raw bandwidth, such as those running large datasets or high-resolution video editing in compatible laptops, the 3200 MT/s speed is advantageous. Product A is limited to 2666 MT/s, which is sufficient for many server workloads but slower in terms of pure data throughput. If your system supports the higher speed and you need maximum bandwidth, Product B is the better choice.
form factor
The two kits use entirely different physical forms. Product A is a 288-pin RDIMM, designed for desktop servers and workstations. It is larger and requires specific motherboard slots. Product B is a 260-pin SO-DIMM, intended for laptops and small form-factor computers. You cannot install Product A in a laptop, nor Product B in a standard desktop server. Your choice depends entirely on your hardware. If you have a laptop, you must choose Product B. If you are building or upgrading a server, Product A is the only viable option. They are not interchangeable.
ecc support
Product A includes ECC and Registered memory support, which detects and corrects data corruption in real-time. This feature is critical for servers and workstations where data integrity is paramount and system crashes must be avoided. Product B is Non-ECC and Unbuffered, meaning it lacks this error-correction capability. For laptop users, Non-ECC is standard and sufficient for general computing, gaming, and content creation. However, for mission-critical applications or heavy computational tasks where a single bit flip could cause a failure, Product A's ECC support provides essential reliability that Product B cannot offer.
capacity
Product A provides a total capacity of 64GB, configured as two 32GB modules. Product B offers 16GB, configured as two 8GB modules. The 64GB capacity of Product A allows you to run more virtual machines, handle larger datasets, or keep more applications open simultaneously without swapping to disk. Product B's 16GB is adequate for most laptop users, including those doing light gaming or office work, but it will limit you if you run memory-intensive software. If you need more space for your data, Product A is the clear winner. If 16GB is sufficient, Product B meets your needs.
voltage
Both Product A and Product B operate at 1.2V. This is the standard voltage for DDR4 memory, balancing performance with power efficiency. Since both kits use the same voltage, there is no difference in power consumption or heat generation based on this spec alone. This consistency simplifies compatibility with standard DDR4 power delivery systems. You do not need to worry about voltage mismatch when selecting between these two options. The choice between them will depend on other factors like speed, capacity, and form factor, rather than electrical requirements.
Choose the right ram for your system
Desktop server or workstation users needing high capacity
This Crucial kit offers 64GB total capacity in a 2x32GB configuration, ideal for demanding workloads. It uses RDIMM form factor with ECC support, ensuring data integrity for professional applications. The CL19 latency provides efficient processing, while the 2666 MT/s speed meets standard server requirements reliably.
Laptop owners seeking plug-and-play upgrade compatibility
This G.SKILL kit is designed specifically for laptops using the 260-pin SO-DIMM form factor. It delivers 16GB capacity with a 3200 MT/s speed rating, suitable for mobile computing. The non-ECC, unbuffered design ensures compatibility with standard notebook motherboards without requiring specialized server hardware support.
Users prioritizing lowest latency for data access
With a CAS Latency of CL19, this module responds faster to memory requests than CL22 alternatives. This lower latency number translates to quicker data retrieval times. If your system supports RDIMMs, this spec advantage provides a tangible performance benefit for tasks sensitive to memory access delays.
Quick picks
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | Crucial 64GB (2x32GB) 2666MHz DDR4 RDIMM | servers requiring 64GB ECC memory | Check price of Crucial 64GB (2x32GB) 2666MHz DDR4 RDIMM on Amazon |
| 2 | G.SKILL Ripjaws 16GB DDR4 3200MHz SODIMM Laptop RAM | laptop upgrades needing 16GB standard DDR4 | Check price of G.SKILL Ripjaws 16GB DDR4 3200MHz SODIMM Laptop RAM on Amazon |
The products compared
Crucial 64GB (2x32GB) 2666MHz DDR4 RDIMM
Best for: servers requiring 64GB ECC memory
- CAS Latency
- CL19 (what this guide is about)
- Total Capacity
- 64GB
- Memory Speed
- 2666 MT/S
- Voltage
- 1.2V
- Module Configuration
- 2X 32GB
- ECC Support
- ECC
View on Amazon: Crucial 64GB (2x32GB) 2666MHz DDR4 RDIMM Affiliate link
This Crucial kit gives you 64GB of DDR4 memory in a registered DIMM form factor. It runs at 2666 MT/S with a CL19 latency. The modules use 1.2V voltage and support ECC. This configuration is designed for servers and workstations that require high capacity and error correction. You get two 32GB sticks for a total of 64GB.
Pros
- 64GB total capacity via two 32GB modules
- CL19 CAS latency for responsive timing
- ECC and Registered support for data integrity
- Runs at 2666 MT/S speed
Cons
- RDIMM form factor is not compatible with standard desktop motherboards
- Lower speed than 3200 MT/S options
- Limited to server or workstation platforms
Good fit if
- You need 64GB of RAM for a server
- You require ECC memory for data safety
- Your motherboard supports RDIMM modules
Skip if
- You are building a standard desktop PC
- You need SO-DIMM memory for a laptop
- You want speeds above 2666 MT/S
Verdict: Crucial 64GB DDR4 RDIMM Kit is a solid choice for servers needing high capacity and error correction. It fits users who prioritize ECC support and registered memory over desktop compatibility.
G.SKILL Ripjaws 16GB DDR4 3200MHz SODIMM Laptop RAM
Best for: laptop upgrades needing 16GB standard DDR4
- CAS Latency
- CL22 (what this guide is about)
- Total Capacity
- 16GB
- Memory Speed
- 3200MT/s
- Voltage
- 1.20V
- Module Configuration
- 2x8GB
- Form Factor
- SO-DIMM
View on Amazon: G.SKILL Ripjaws 16GB DDR4 3200MHz SODIMM Laptop RAM Affiliate link
This is a 16GB kit of G.SKILL Ripjaws DDR4 SO-DIMM memory. It runs at 3200MT/s with a CAS Latency of CL22. The kit uses two 8GB modules in a 260-pin form factor. It operates at 1.20V and is Non-ECC. You should use this for laptop upgrades where you need standard speed and reliable compatibility with notebook systems.
Pros
- 16GB capacity split into 2x8GB modules
- 3200MT/s memory speed for efficient data transfer
- CL22 CAS Latency for responsive performance
- 1.20V operating voltage for energy efficiency
Cons
- Lower CL22 latency compared to CL19 options in this guide
- Smaller 16GB total capacity compared to 64GB alternatives
- Non-ECC support limits use in server-grade applications
Good fit if
- You are upgrading a laptop with 260-pin SO-DIMM slots
- You need a standard 16GB configuration for everyday tasks
- You prefer widely compatible Non-ECC memory for notebooks
Skip if
- You require server-grade ECC memory for data integrity
- You need high-capacity 64GB kits for heavy workloads
- You want lower CL19 latency for maximum speed
Verdict: G.SKILL Ripjaws 16GB DDR4 3200MHz is a solid choice for laptop owners who need reliable 16GB of standard-speed memory. It fits users who prioritize compatibility and voltage efficiency over maximum capacity or the lowest latency found in other options.
Specifications side by side
| Spec | Crucial 64GB (2x32GB) 2666MHz DDR4 RDIMM | G.SKILL Ripjaws 16GB DDR4 3200MHz SODIMM Laptop RAM |
|---|---|---|
| Total Capacity | 64GB | 16GB |
| Memory Speed | 2666 MT/S | 3200MT/s |
| CAS Latency | CL19 | CL22 |
| Voltage | 1.2V | 1.20V |
| Module Configuration | 2X 32GB | 2x8GB |
| Form Factor | not stated | SO-DIMM |
| ECC Support | ECC | Non-ECC |
| Compatible Device | not stated | Laptop |
| Size | not stated | 16GB |
| Dimensions | 1.97 × 0.98 × 0.39 inches | 1.1 × 9.7 × 6.5 inches |
| Weight | 0.8 ounces | 1.76 ounces |
| Model | CT2K32G4RFD4266 | F4-3200C22D-16GRS |
| Color | not stated | black |
Frequently asked questions
Is CL19 better than CL22 for latency?
Yes, CL19 offers lower latency than CL22. A lower CAS Latency number means the memory module can access stored data faster. This results in quicker response times for tasks that rely heavily on rapid data retrieval from the RAM sticks.
Can I use CL19 RDIMM in a laptop?
No, you cannot use RDIMM in a standard laptop. The CL19 option uses Registered DIMM form factor, which is designed for servers. Laptops require SODIMM form factor modules. Mixing these form factors will prevent the memory from fitting or functioning in your device.
Does CL22 RAM support error correction?
No, the CL22 SODIMM option does not support error correction. It is labeled as Non-ECC. If you need data integrity for professional workloads, you should look for ECC-supported memory. The CL19 RDIMM option includes ECC support for error checking.
What is the voltage difference between CL19 and CL22?
There is no voltage difference between these specific kits. Both the CL19 RDIMM and the CL22 SODIMM operate at 1.2V. This standard voltage helps maintain power efficiency across different DDR4 memory types, regardless of their latency or form factor specifications.
Which RAM is better for server workloads?
The CL19 RDIMM is better for server workloads. It provides 64GB of total capacity and includes ECC support for data integrity. The CL22 option is a 16GB SODIMM designed for laptops, making it unsuitable for high-capacity server requirements or registered memory needs.
Does higher MHz mean lower latency?
Not necessarily, as seen in these examples. The CL22 kit runs at 3200MHz, while the CL19 kit runs at 2666MHz. Higher speed ratings do not automatically guarantee lower latency numbers. You must check the CAS Latency spec separately to determine access speed.