Kingston KF556C40BBK4-128

Overview

The Kingston KF556C40BBK4-128 is a 128GB DDR5 memory kit designed to enhance desktop performance with faster data handling and increased multitasking capacity. Comprising four 32GB modules, it operates at speeds up to 5600 MT/s with a CL40 latency, making it well suited for creators, gamers, and power users who demand responsive and reliable memory for intensive workloads.

This kit supports Intel XMP 3.0 profiles, allowing users to easily enable the rated speed and timings through compatible BIOS settings. Additionally, the Plug N Play feature enables most modern systems to automatically configure the modules at their highest supported settings, simplifying installation and setup.

Key features

• High-capacity 128GB kit composed of four 32GB DDR5 modules to support heavy multitasking and memory-intensive applications
• Memory speed of 5600 MT/s delivers rapid data throughput for smoother performance in demanding tasks
• CL40 latency balances speed and responsiveness for efficient processing
• Intel XMP 3.0 certification enables quick and easy profile loading for optimized performance without manual tuning
• Plug N Play support allows automatic configuration on compatible systems, reducing setup complexity
• Non-ECC and unbuffered design ensures compatibility with mainstream desktop motherboards while keeping power consumption low
• 288-pin layout fits current DDR5 motherboards, making it a straightforward upgrade or build option

Key specs

• Memory type: DDR5
• Capacity: 128GB (4 x 32GB modules)
• Speed: 5600 MT/s
• Latency: CL40
• Pin configuration: 288-pin
• Compatibility: Non-ECC, unbuffered for mainstream desktops
• Intel XMP version: 3.0

Compatibility and usage

This memory kit is compatible with current DDR5 motherboards that support 288-pin modules and Intel XMP 3.0 profiles. It fits well in high-performance desktop builds aimed at video editing, 3D rendering, large-scale simulations, and gaming setups that require high frame rates and fast data access. The Plug N Play feature also makes it a convenient choice for users who want a hassle-free upgrade without manual BIOS adjustments.

Its non-ECC, unbuffered design means it is intended for consumer and prosumer desktops rather than servers, ensuring stable operation with lower power consumption. This kit is a strong choice for users preparing for future software demands that benefit from large memory capacity and high speed.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, and include all tags, manuals, accessories, and original, unaltered packaging. To start a return, please email us for approval. Items sent back without approval may be refused or returned to the sender. If any item is kept, its value will be deducted from the refund.

Non-returnable items include opened TVs, combos, or monitors 37″ or larger, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method. Please allow 5–7 business days for the credit to post. Shipping and handling are nonrefundable. If an item is used, incomplete, or not in its original condition, a 30% restocking fee may apply. Direct exchanges are not offered. To exchange an item, please purchase the replacement separately and return the original for a refund.

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We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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