CT2K8G48C40U5 Crucial 16GB Memory
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CT2K8G48C40U5 Crucial 16GB 4800MHz PC4-38400 Cl40 ECC New

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Part Number#: CT2K8G48C40U5
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Short Description:
CT2K8G48C40U5 Crucial 16GB 4800MHz PC4-38400 Cl40 ECC Registered 1.1v DDR5 288-Pin Udimm Unbuffered Module Memory | Brand New 3 Years Warranty
Brand Warranty:
3 Years from the Manufacturer
Product Condition:
New Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days

Product Information

CT2K8G48C40U5 is a memory module manufactured by Crucial Technology, a leading producer of computer hardware components. This specific module is a DDR5 16GB memory that operates at 4800MHz with CL40 latency. In this article, we will explain what each of these terms means, how they affect the performance of the memory module, and why they are important.

Memory Capacity

The CT2K8G48C40U5 is a memory module with a capacity of 16GB. This means that it has 16 billion bytes of memory that can be accessed by the computer's processor. The more memory a computer has, the more applications it can run simultaneously without experiencing a slowdown. The memory capacity of a computer determines how much data it can store and access at any given time.

Memory Speed

The speed of the memory module determines how quickly data can be read and written from it. The CT2K8G48C40U5 memory module operates at a speed of 4800MHz, which is extremely fast. The speed of the memory module is measured in megahertz (MHz) and determines how many data transfers can be made per second. The faster the memory module, the faster data can be processed by the computer.


Latency refers to the delay that occurs between the time when the computer requests data from the memory module and the time when the data is delivered. The CL40 latency of the CT2K8G48C40U5 memory module means that there is a delay of 40 clock cycles between the time when the computer requests data and the time when it is delivered. The lower the latency of a memory module, the faster data can be accessed by the computer. CL40 latency is considered to be a high latency, which means that the memory module may not be as fast as other modules with lower latencies.

ECC Registered

ECC stands for Error Correcting Code, and it is a feature that helps to detect and correct errors that occur in the memory module. The ECC feature is important in servers and other mission-critical systems where data accuracy is essential. The CT2K8G48C40U5 memory module is ECC registered, which means that it has a built-in mechanism for detecting and correcting errors that occur during data transfers.

1.1v Power Consumption

The CT2K8G48C40U5 memory module has a power consumption of 1.1 volts (v). This means that it consumes less power compared to other memory modules, which can help to reduce the overall power consumption of the computer. Lower power consumption also means that the memory module generates less heat, which can help to keep the computer cool.

288-Pin UDIMM

UDIMM stands for Unbuffered Dual In-Line Memory Module, and it is a type of memory module that is commonly used in desktop computers. The CT2K8G48C40U5 memory module is a 288-pin UDIMM, which means that it has 288 pins that connect it to the motherboard. UDIMMs are easy to install and are generally less expensive compared to other types of memory modules.


Unbuffered memory modules are those that do not have a buffer chip that sits between the memory module and the motherboard. This means that the memory module communicates directly with the processor, which can result in lower latency and better performance. The CT2K8G48C40U5 memory module is unbuffered, which means that it can communicate directly with the processor.

General Information about the Crucial CT2K8G48C40U5

  • Manufacturer: Crucial
  • Part Number or SKU# CT2K8G48C40U5
  • Product Type: Memory (RAM)
  • Product RAM Type: 16GB PC4-38400

Technical Information

  • Storage Capacity: 16GB
  • Memory Type: DDR5 -udimm 288-pin
  • Number of Modules: 2 X 8gb
  • Memory Speed: 4800MHz (pc4-38400)
  • Features: Unbuffered
  • Error Checking: Ecc
  • Latency Timings: Cl40
  • Device Supported: Desktop Pc

Physical Characteristics

  • Dimensions (W X D X H): 8.89 X 19.81 X 1.91 Cm (3.5 X 7.8 X 0.75 In)
  • Weight: 0.45 Kg (1 Lb)

Contact us or ask for live chat/help if you have any questions about the compatibility of this item to ensure the model's matching features with your current system.

RAM is probably the most important organ of your PC or server. Because if we define a processor as the heart of a computer system, RAM is its brain.

RAM in a server system is one of the components that are directly responsible for the performance of the system. Officially it is called RAM (Rapid Storage Device), which can temporarily store the output, input, and intermediate data of the operating system and programs. RAM is a power-dependent device because data storage in such a system requires a constant power supply, or if there is no power supply, all memory cells are cleared.

The main characteristic of high-quality RAM is its speed in the first place. At the same time, installing 2 or more memory modules in a computer system must necessarily choose modules that will work at the same speed, because the system chooses the slowest speed from the available memory modules.

Focusing on the tasks assigned to the server device, you can choose the memory by volume. It will be sufficient to buy RAM up to 2 GB to solve every day not complicated tasks, and when upgrading the computer system and for more complex purposes - the memory capacity of at least 4 GB will suffice. There are two most popular RAM types on the market today, namely DDR2 and DDR3. And at the same time, it is important to remember that they are absolutely incompatible with each other.

We recommend installing DDR (double-data-rate) memory modules of modern 3rd generation (namely DDR3). This type of memory has higher clock frequencies (up to 2,400 MHz), and lower power consumption (30-40% lower compared to DDR2), and, consequently, reduced heat emission.

What other characteristics of RAM you should pay attention to when choosing it:

  • Form factor, i.e. the type of design of the memory module itself;

This is essentially the memory board construction. It includes the memory module size, number, and location of contacts. Keep in mind that different form factors are incompatible with each other.

  • Bus frequency and data transfer rate.

Bus bandwidth and frequency depend on each other. When choosing the required frequency, you need to rely on the capabilities offered by the system. We recommend choosing a frequency that matches the one supported by your CPU and motherboard.

  • The amount of memory that has already been mentioned;

A bigger RAM is required when running administrative software like spam prevention or antivirus checking, which takes up a lot of space. Choosing the right memory RAM is highly prioritized to ensure the computer's 100% performance. Many options of RAM are available online with different storage space for every server's needs.

  • Timings.

That is latency or time delays of your RAM. The bandwidth, and therefore the speed of the whole system, will directly depend on them.

ALLHDD provides a unique opportunity to buy RAM produced by world brands with a warranty, affordable price, and Free Ground Shipping on all orders placed within the 48 States in US. All our customers receive expert advice and information support.


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ALLHDD guarantees that the products will not have defects in material that will affect the product's functionality during the Standard Warranty Period. The warranty period starts when the merchandise/items from our warehouse.

What does ALLHDD.Com warranty cover?

30-days to 3 years warranty:

Replacement or refund. In the case of material defects, we will try to replace the product first. The product will be replaced before the expiration of the original warranty. For any failure of hardware, if we cannot process the replacement of the product(s)/model(s), we will refund the original selling/invoiced price. The shipping costs and sales tax, if any, are non-refundable. ALLHDD retains the right to decide whether the item(s) will process for replacement or refund.

What is not covered by our warranty?

The reason why our warranty does not cover any problem caused by the following conditions:

(a) misuse of hardware; accidental damage; carelessness product(s) damage; shock; temperature beyond the specification of any product; faulty installation; operation; modification of goods;

(b) any misuse outside the instructions in the user manual for any specific product;

(c) damaged caused by other hardware or equipment. The warranty will void if the item is returned with physical damage, damage to the retail box, removed from the box, counterfeit labels/labelled by them, or any modifications of internal and external covers. Data loss or damages to any other equipment we do not cover by our offered warranty.

What is the Manufacturer/Brand Warranty?

In general, a manufacturer's warranty service/support is a written guarantee to the buyer of a product. Its terms assure the replacement or repair of the product, if necessary, within a specified period after the purchase (2-5 years depending on the brand/manufacturer). It is typically included in the price of the product. Products are brand new and sealed and the original manufacturer box is complete with the Manufacturer's genuine warranty. For most of the brand new/retail products that come with the manual and box, exceptions may apply (i.e., Cisco, Juniper Networks).

For the server parts (i.e., Dell, HPE) to get Full coverage of the warranty server must have a full 3- 5 years warranty. However, ALLHDD.COM will cover the warranty duration if any Manufacturer doesn't support the advertised warranty and there is no refund for those.
Final Sale items are non-returnable/refundable in any situation. Any question? please ask our team before the shipment.

Important notes:

We can provide additional warranty service/support for any product you purchase from us if you need additional warranty coverage before finalizing the order from ALLHDD.Com. You need to ask in live chat/help or call us for more information.

Individual product warranty mentioned on each item product description page/detail page.

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Shipping Options and Estimated Delivery Time

UPS Shipping Options:

FREE UPS® Ground (Free shipping to all orders for 48 states!)
Estimated delivery time: 4-7 business days

UPS 3 Day Select®
Estimated delivery time: 3 business days

UPS 2nd Day Air®
Estimated delivery time: 1-2 business days, Delivery by 10:30 AM or 2:00 PM

UPS Next Day Air® Standard Overnight
Estimated delivery time: Overnight 2-5 PM, Standard Overnight Delivery.

UPS Next Day Air® - Priority Overnight
Estimated delivery time: Overnight Delivery (Next Business Day) Delivery by 10:30 AM or 12:00 PM

UPS Next Day Air® First Overnight - Early A.M
Estimated delivery time: Overnight 8:00 AM, Early morning, overnight delivery for your time-critical shipments.

UPS® First Overnight - Saturday
Estimated delivery time: Overnight 8:30 AM – Saturday

FedEx Shipping Options:

FedEx Ground®
Estimated delivery time: (4–7 business days in the contiguous 48 states)
*For residential delivery via FedEx Ground use FedEx Home Delivery®
Estimated delivery time: 4−7 business days, based on the distance to the destination.

FedEx Express Saver®
Estimated delivery time: 3 business days (by 4:30 PM to U.S. businesses; by 8:00 PM to residences)
Available throughout all 50 states (except Hawaii and Alaska)

FedEx 2Day®
Estimated delivery time: 2 business days (by 4:30 PM to U.S. businesses; by 8:00 PM to residences)
Available throughout all 50 states

FedEx Standard Overnight®
Estimated delivery time: Next-business-day (by 4:30 PM to U.S. businesses and by 8:00 PM to residences)
Available throughout all 50 states (Hawaii is outbound only)

FedEx Priority Overnight®
Estimated delivery time: Next-business-day (by 10:30 PM to U.S. businesses, noon to most residences)
Available throughout all 50 states

FedEx First Overnight®
Estimated delivery time: Next-business-day (by 8:30 or 9 AM to most areas)
Available throughout all 50 states

Worldwide Shipping Options:

UPS®/FedEx® International Economy

Estimated delivery time: 4-7 business days

UPS®/FedEx® International Priority

Estimated delivery time: 2-4 business days

UPS®/FedEx® Ground Shipping Canada

Estimated delivery time: 5-8 business days

Important notes:

  • The processing of orders with Ground Shipping can take up to 24-48 hours. But we try to process all orders the same day.
  • We are not responsible for weather problems that may affect the delivery of goods by carriers. We cannot guarantee the exact delivery time, regardless of the carriers' claims.
  • If you have any specific delivery time requirements, please contact our customer support and someone from our customer service team will be able to help you.
  • You can estimate the shipping cost from the products detail page, also available on the checkout page
  • The shipping cost depends on box dimensions, weight, and zip/postal code
  • To get a FedEx® delivery service you need to mention it on the checkout page notebox.
  • For urgent shipments, please contact our customer service.
  • Shipping cut off 4:00 PM (Monday-Friday) and available blind drop shipment.