Unbuffered and buffered DDR4 RAM are two types of memory modules that are used in modern computer systems. The key difference between the two is the presence of a buffer, which is an additional chip located on the memory module.
Unbuffered DDR4 RAM, also known as unregistered RAM, is a simpler and more affordable option. It has no buffer chip and operates directly between the memory controller and the memory chips. Unbuffered RAM is typically used in personal computers, laptops, and workstations, where it can provide high-speed access to data and applications.
Buffered DDR4 RAM, also known as registered RAM, contains an additional buffer chip on the memory module. This chip helps to reduce the load on the memory controller by acting as a middleman between the controller and the memory chips. Buffered RAM is often used in servers, where large amounts of memory are required to handle heavy workloads.
The buffer chip in registered RAM can help to improve stability and reliability by reducing electrical noise and signal delays. It also enables the use of higher-capacity memory modules, as the buffer can help to prevent data loss and corruption when handling large amounts of data.
DDR4 SDRAM technology and its advantagesDDR4 SDRAM (Double Data Rate 4 Synchronous Dynamic Random Access Memory) is the latest generation of memory technology used in modern computer systems. It offers several advantages over its predecessor, DDR3 SDRAM, including:
- Increased memory speed: DDR4 SDRAM operates at a higher clock speed than DDR3, resulting in faster data transfer rates and improved system performance.
- Improved power efficiency: DDR4 SDRAM uses less power than DDR3, making it a more energy-efficient choice for modern computer systems.
- Higher memory density: DDR4 SDRAM supports higher memory densities than DDR3, allowing for the use of larger memory modules and higher total memory capacity in a system.
- Improved reliability: DDR4 SDRAM includes a number of features designed to improve reliability, such as improved error correction and detection capabilities.
- Increased bandwidth: DDR4 SDRAM offers increased bandwidth compared to DDR3, enabling faster data transfer between the memory and processor.
- Backward compatibility: While DDR4 is not backward compatible with DDR3 or earlier generations of RAM, some DDR4 motherboards support both DDR3 and DDR4 memory modules, allowing for a smooth transition to DDR4 technology.
The 288-pin design is a feature of DDR4 SDRAM memory modules, including the AA281953 Dell 16GB 2666MHz PC4-21300 unbuffered DDR4 SDRAM module. This design specifies the number and arrangement of the electrical contacts (or pins) on the module that connect it to the motherboard.
Each DDR4 SDRAM module has 288 pins arranged in a specific pattern. The pins are arranged in a grid, with 144 pins on each side of the module. The pins are spaced at a pitch of 0.75 mm, which is slightly tighter than the pitch used in earlier generations of DDR SDRAM.
The 288-pin design is necessary to support the increased data transfer rates and improved performance offered by DDR4 SDRAM. The extra pins enable more data to be transferred simultaneously between the memory module and the processor, which helps to increase system performance.
When installing a DDR4 SDRAM module with a 288-pin design, it is important to ensure that the module is installed correctly and securely in the appropriate memory slot on the motherboard. The pins must be aligned with the corresponding slots on the motherboard and the module must be firmly seated to ensure proper electrical contact.
General Information
- Brand Name: Dell
- MPN: AA281953
- Type: Memory (RAM)
- RAM Type: PC4-21300
- Product Name: 16GB DDR4 SDRAM Memory Module
- SKU: AA281953
Technical Information
- Storage Capacity: 16GB
- Memory Technology: DDR4 SDRAM
- Number Of Modules: 1 X 16GB
- Bus Speed: 2666MHz DDR4-21300/PC4-21300
- Data Integrity Check: Non Ecc
- Signal Processing: Unbuffered
- Cas Latency Timings: Cl19
- Rank Features: 2rx8
- Form Factor: 288-Pin Udimm
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)
Compatibility
- This Product Is Compatible With The Following Systems:
- Alienware Aurora R6
Warranty
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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Delivery
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®
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UPS® First Overnight - Saturday
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FedEx Shipping Options:
FedEx Ground®
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*For residential delivery via FedEx Ground use FedEx Home Delivery®
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FedEx Express Saver®
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Available throughout all 50 states (except Hawaii and Alaska)
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Available throughout all 50 states
FedEx Standard Overnight®
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Available throughout all 50 states (Hawaii is outbound only)
FedEx Priority Overnight®
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Available throughout all 50 states
FedEx First Overnight®
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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.
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- You can estimate the shipping cost from the products detail page, also available on the checkout page
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