Hydro X Series iCUE LINK XH405i Custom Cooling Kit - Hardline Loop

In this review of the Hydro X Series iCUE LINK XH405i Custom Cooling Kit the bottom line is simple: this kit is for PC builders who want the visual impact of a hardline water loop with fewer integration headaches. It combines a full complement of premium parts into a single package, and the standout reason to buy is how the iCUE LINK system consolidates power and data into one hub port, making RGB and pump control far easier than typical custom loops.

Key Features

• Complete loop in one box: Includes a CPU water block, D5 pump/reservoir, 360mm radiator, three QX120 RGB fans, clear coolant, tubing tools, and fittings so builders can complete a hardline loop without sourcing separate components.
• iCUE LINK integration: The single-port data and power connection via the System Hub reduces cable clutter and simplifies synchronizing lighting and pump control through iCUE.
• High-performance pump: The XD5 Elite D5 pump/reservoir provides intelligent control and a temperature sensor for automatic adjustments to cooling output and noise levels.
• Dynamic RGB: 148 individually addressable LEDs across the CPU block, pump/reservoir, and fans deliver highly tunable lighting effects for a striking system appearance.
• Hardline support and tools: The kit supplies tube bending and cutting tools plus extra fittings for future GPU expansion, making the physical build process more approachable for first-time hardline builders.

Who It's For

This kit is aimed at enthusiasts building a high-performance desktop who want the aesthetics and thermal advantages of a hardline custom loop but prefer fewer compatibility and wiring hassles. It suits users planning a CPU-focused loop out of the box and those who value integrated RGB and automatic pump control through a single software ecosystem.

Users who need a complete GPU cooling solution included should look elsewhere or plan to purchase a GPU block separately, and extreme customizers who require nonstandard fittings or radiator sizes may still prefer sourcing parts individually.

Pros & Cons

Pros

• Included tube bending tools and fittings make hardline assembly more approachable for builders.
• iCUE LINK single-port connectivity simplifies RGB and pump control and reduces cabling.
• Strong cooling performance from the XC7 Elite block and XR5 360mm radiator with quiet QX120 fans.
• High build quality and premium components that feel durable and well matched.

Cons

• Does not include a GPU block, so GPU cooling expansion requires additional purchase.
• Hardline loops still require time and care to bend and fit tubes correctly despite included tools.

Specifications

Our Verdict

The iCUE LINK XH405i kit is a strong value for builders who want a polished hardline look and reliable CPU cooling without assembling dozens of separate parts. Its integrated control, quality components, and included tools make it a practical choice for enthusiasts willing to buy a GPU block later if needed.

Frequently Asked Questions

Does the kit include a GPU block?
No, the kit includes extra fittings for GPU expansion but a GPU water block is not included and must be purchased separately.

How does iCUE LINK simplify installation?
iCUE LINK routes power and RGB/data through a single System Hub connection, reducing cable runs and centralizing control in iCUE software.

Are tools for hardline tubing included?
Yes, tube bending and cutting tools are included so builders can form hardline tubing without buying separate tools.