# Radiator Alphacool R27-S420 420mm 18 FPI for liquid cooling, 3x120mm fan mounts

**URL:** https://aio.lv/en/product--alphacool-r27-s420--11506540
**Data updated:** 2026-02-18 14:38 (EET)
**Category:** Computer Component Accessories
**Manufacturer:** Alphacool
**Manufacturer code:** R27-S420
**EAN:** 4049469346409
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 89.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 73.96 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--alphacool-r27-s420--11506540

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

Alphacool R27-S420 is a 420 mm liquid cooling radiator with a fin density of 18 FPI designed for PC water-cooling loops. It accepts three 120 mm fans and provides heat dissipation for CPUs and GPUs in custom cooling systems. The radiator is intended for integration into full-size cases or racks, improving thermal performance and enabling lower component temperatures and quieter fan operation.

## Long description

The Alphacool R27-S420 is a 420 mm liquid cooling radiator with 18 fins per inch (FPI) designed for custom PC water-cooling loops. It supports three 120 mm fans on standard mounts and offers enhanced surface area for heat transfer from coolant to ambient air. The radiator is intended for installation in full-size towers or rack systems where space allows a 420 mm unit, enabling improved thermal management for high-performance CPUs and GPUs while helping maintain lower fan speeds and reduced noise during operation.
Advantages
The R27-S420 combines a high fin density with a 420 mm length to deliver efficient heat dissipation in compact mounting configurations. Compatibility with three 120 mm fans lets users select fans for a balance of airflow and noise. Solid build quality and standard mounting spacing make integration into existing water loops and cases straightforward. The 18 FPI fin density provides a compromise between static pressure requirements and surface area, suitable for a wide range of fan types and cooling scenarios.
Suitable for
Custom PC water-cooling loops for gaming and workstation systems
Cooling high-performance CPUs and GPUs in full-size cases or racks
Systems where a 420 mm radiator fits front, top, or bottom mounts
Key specifications
Radiator length: 420 mm
Fan mounts: 3 × 120 mm
Fin density: 18 FPI (fins per inch)
Compatibility: standard 120 mm fan spacing and mounting holes
Use: liquid cooling heat exchanger for PC cooling loops
How to use
Install the radiator in a location within your case that accommodates a 420 mm unit, aligning the three 120 mm fan mounts to the chosen airflow direction. Secure fans to the radiator using the case or radiator mounting holes and connect the coolant tubing to the loop according to your cooling system layout. Fill and bleed the loop following the coolant and pump manufacturer instructions, then verify there are no leaks and that fans operate at intended speeds for the required static pressure and airflow characteristics.
Usage recommendations
Select fans that match the radiator’s 18 FPI fin density—fans with moderate to high static pressure perform best. When installing in tight spaces, prioritize higher static pressure fans to overcome resistance through fins. Regularly inspect and clean the radiator fins to maintain airflow and thermal performance, and ensure secure fittings and proper coolant levels to prevent leaks and maintain long-term reliability.

## FAQ

### How much does the Radiator Alphacool R27-S420 420mm 18 FPI cost, and is it available for purchase?

The price is 89.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 08.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Radiator Alphacool R27-S420 420mm 18 FPI be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Alphacool products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Alphacool service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11506540/68514110_large.webp