Hydro X Series iCUE XH303i RGB Custom Cooling Kit

$479.99 USD

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SKU CX-9070004-WW
Hydro X Series iCUE XH303i RGB Custom Cooling Kit

$479.99 USD

The CORSAIR Hydro X Series iCUE XH303i RGB Custom Cooling Kit contains all the essentials you need to build your very own compact custom cooling loop, turning your PC into a masterpiece while improving its performance.

Compatible with CORSAIR iCUE

Custom Cooling Kit Config


Custom Cooling Kit

A Complete Custom Cooling Solution for Your PC

XC7 RGB CPU Water Block

The XC7 RGB CPU Water Block combines premium nickel-plated copper construction and extreme cooling performance, compatible with Intel® LGA 1200 and AMD AM4 sockets.

XD3 RGB Pump/Reservoir Combo

The XD3 RGB Pump/Reservoir Combo features a high-performance DDC PWM pump, integrated RGB lighting, and in-loop temperature sensor to drive even the most compact custom cooling systems.


Eight RGB LEDs per fan create vibrant lighting and visual effects to go along with powerful cooling.

Intelligently Controlled, Low-Noise Custom Cooling

Push your system further with superior cooling performance coupled with remarkably quiet operation, intelligently controlled with an included iCUE Commander PRO Smart RGB Lighting and Fan Speed Controller and in-loop temperature sensor.

XR5 360mm Radiator

Delivers extreme custom cooling performance, with a 30mm radiator thickness and premium copper core.

The Tools You Need

An included Hacksaw, Tube Reamer, Silicone Rod, Tube Bending Mandrel and Sawing Clamp make it easy to cut, bend, and finish the tubing for those clean perfect tubing runs.

XT Hardline Tubing

Create stunning loops with crystal-clear PMMA tubing, easily cut and bent to your needs using the included saw and silicone insert and installed with the included black XF Hardline Fittings and Adapters.

XL5 Performance Coolant

Includes one liter of clear XL5 Performance Coolant to keep your loop running clean and cool, pre-mixed with anti-corrosion and anti-bacterial inhibitors.


CORSAIR iCUE software enables complete control over your custom cooling loop. Create automated fan curves that adjust fan speeds based on your system’s thermals, and customize dynamic RGB lighting effects for the XC7 RGB CPU Water Block, XD3 RGB Pump/Reservoir Combo, and SP120 PRO RGB fans.

Product Type
Custom Cooling Kit
2 year
Port Thread
G1/4'' BSPP
Thermal Paste
Pre-applied thermal paste
Cold Plate Material
Fluid Chamber Material
Pump Type
Xylem DDC 3.2 PWM9
Operating Temperature
60°C coolant temperature
Compatibility - Material
Only mix with other copper / brass products
Radiator Dimensions
396mm x 120mm x 30mm
Radiator Thickness
Fan Quantity
CPU Socket Compatibility
Intel 1200 | Intel 115x | AMD AM4

CORSAIR Hydro X Series products are compatible with the following coolants:

Coolant Brand Coolant Model Recommendation
CORSAIR XL5 Performance Coolant Preferred
Aquacomputer Double Protect Ultra Compatible
Coolaboratory Liquid Coolant Pro Compatible
EK Cryofuel Compatible
Jingway Iceland X Compatible
Koolance LIQ-702 Compatible
Liquid.Cool CFX Opaque Compatible
Mayhems IDC Compatible
Mayhems Pastel Compatible
Mayhems X1 Compatible
Mayhems XT-1 Nuke Compatible
Mayhems XT-1 Compatible
Nanoxia Cooling Fluid Pro Compatible
Nanoxia Cooling Fluid Pro Opaque Compatible
Primochill TRUE. Compatible
Thermaltake C1000 Compatible
XSPC EC6 Compatible
XSPC ECX Compatible
Alphacool Eiswasser Not compatible
Alphacool Eiswasser Pastel Not compatible
Alphacool Cape Kelvin Catcher (CKC) Not compatible
Aquatuning AT-Protect Not compatible
EK Cryofuel Solid Not compatible
Jingway Galaxy Not compatible
Mayhems SFX Aurora Not compatible
Phobya ZuperZero Xtreme Not compatible
Primochill VUE Not compatible
Swiftech HydrX Not compatible
Thermaltake C1000 Opaque Not compatible
Thermaltake Coolant 1000 Not compatible
UFO Technologies Cryo-Chillz Not compatible

Warranty FAQ

How do I make a warranty claim?

Prior to submitting your warranty claim, we recommend checking the Corsair knowledge base at https://support.corsair.com/ first, where you can find answers to commonly-asked questions. You can also receive troubleshooting assistance by clicking Ask a Question or proceed with product replacement by clicking Request an RMA.

Valid warranty claims should be processed through the retailer where the item was purchased during the first thirty (30) days after purchase. This period may vary depending on where you purchased your product; please verify the return policy with the retailer where you purchased your product. Any warranty claims that cannot be processed through your original point our purchased should be submitted to Corsair at https://support.corsair.com/ 

What are Corsairs replacement options?

Corsair offers the following Warranty fulfillment options:

Standard Replacement:

Through Corsairs Standard Replacement process, Corsair will issue an approved RMA number for the return and replacement of your defective product(s). Our Standard Replacement processing time from receipt of your product(s) to the replacement product(s) shipment is 1-3 business days plus transit time.

Express Replacement:

At Corsair, we understand the need to be up and running at all times! To minimize down time, we offer an Express Replacement RMA process. Through this process Corsair will ship your replacement product(s) prior to receiving your defective product(s). This process requires a valid Credit Card where a holding fee will be applied for the cost of the product until the returning product(s) are received by Corsair. To avoid being fully charged for the Express Replacement product(s), the defective product(s) must be received by Corsair within 10 business days from the date your Express Replacement order is shipped.

Accessory Product Request:

Experiencing a problem with a Corsair Component Product? Many of Corsair products have easy to install replacement accessories which will resolve the issue and prevent the need to return the entire product for replacement.

Where do I ship my items?

Corsair operates multiple RMA receiving locations worldwide. Your RMA confirmation will specify the specific return address you must use when sending your RMA package. This will be your standard return location and should not be changed without prior approval from Corsair. Any packages received at an unauthorized location may be refused and returned to the sender at the senders expense.

How to find your lot code


Lot codes for Corsair products can generally be found in the follow locations. For more specific information, please view the Corsair knowledge base Lot Code article for a particular product series.

Headsets: The code is located on the earcup's arm.

Speakers: The code is located on the back of the subwoofer.

Case: The code is located on the back panel.

Cooling: The code is located on the radiator.

Flash: The code is located on the unit's packaging, near UPC barcode.

SSD: The code is located on the label on top of the SSD.

Mice: The code is located on the label taped next to the USB connector.

Keyboard: The code is located on the packaging near the UPC barcode.

Memory: The code is on the memory module's label.

PSU: The code is on the PSU label, next to the serial number.

XC7 RGB (1200/AM4)
XR5 360
XD3 Pump/Reservoir Combo
3m XT Hardline 10/14mm
8 x Hardline 14mm fittings (BLACK)
2 x 90° Rotary Adapters (BLACK)
250 ml Filling Bottle
XT Hardline Bending Kit
3 x SP 120 RGB PRO Fans


Take out all the guesswork and create the custom cooling system of your dreams. With thousands of components and millions of hardware combinations, it’s easy to pick, tweak and personalize your custom cooling system, with a detailed render of how your future loop will look.