Alphacool has introduced the ES Chiller 700, a new compressor-based cooling system for server and workstation applications. The unit cools and circulates the coolant in a single process, delivering up to 700 watts of cooling capacity, and costs 749.99 euros. The Chiller is now available in the Alphacool online store.
The Braunschweig-based manufacturer has been in the PC water cooling business for over 20 years and is further expanding its Enterprise Solutions portfolio with the ES Chiller 700. Accordingly, the target audience isn’t sitting at a home gaming PC, but rather in a server room or at a workstation, where processors and graphics cards are under constant load and traditional air cooling or an AIO cooler eventually reach their limits.
Pump, expansion tank, and connectors all in one housing
What makes the ES Chiller 700 special is that it comes with its own pump. The integrated pump achieves a head of up to 10 meters and a maximum flow rate of 10 liters per minute, allowing the chiller to be integrated directly into an existing cooling loop without the need to install a separate pump. This not only saves space in the case or rack but also eliminates a potential source of failure.
In addition, it features a built-in expansion tank with a 2-liter capacity, which ensures sufficient buffer in the circuit. Connections are made via standard G1/4″ female threads, allowing the chiller to be integrated into existing water-cooling systems without the need for adapters.
Technical Specifications at a Glance
| Specifications | Value |
|---|---|
| Maximum cooling capacity | 700 watts |
| Compressor power | 460 watts |
| Refrigerant | R1234YF (130 g charge) |
| Pump power | 28 watts |
| Max. head | 10 m |
| Max. flow rate | 10 l/min |
| Expansion tank | 2 liters |
| Temperature control | in 0.3 °C increments |
| Connections | G1/4″ female thread |
| Dimensions (W x D x H) | 380 x 260 x 235 mm |
| Weight | 16 kg |
| Protection class | IP44 |
| Power supply | 220 V, 50 Hz |
| Price | 749.99 euros |
The temperature can be adjusted in 0.3 °C increments via an integrated display, which is quite precise for water cooling systems in this price range. Anyone who’s ever struggled to get a clean setpoint with a coarse thermostat will appreciate this level of precision.
Safety Features: Overvoltage Protection and Alarms
Since the ES Chiller 700 operates in server environments where a cooling failure can quickly become costly, Alphacool has built in a few safety measures. The compressor is protected against overvoltage, and the unit also issues an alarm if the flow rate is too low or the temperature rises too high. Such alarm functions are more commonly found in significantly more expensive industrial chillers, not in the consumer water-cooling segment from which Alphacool originally hails.
Despite its stationary design, Alphacool has included a carrying handle. Weighing 16 kg, the chiller is no lightweight, but it can still be carried reasonably comfortably from one place to another when needed—for example, when reconfiguring the rack.
Positioning: Where the ES Chiller 700 Fits into the Portfolio
Alphacool already offers a larger model, the ES Chiller 1000, for even more demanding cooling loads, including a 5U server rack variant. The ES Chiller 700 is positioned below it as a more compact and affordable entry-level option for anyone who needs compressor-based cooling but doesn’t necessarily want the large rack model right away.
For readers who are otherwise more familiar with traditional AIO and custom water cooling systems for gaming PCs: The main difference from the well-known Raijintek EOS 240 RBW or similar all-in-one cooling systems lies primarily in the compressor. While AIO coolers simply dissipate heat into the ambient air, a compressor chiller can actively lower the coolant temperature below room temperature—which makes all the difference under continuous load in servers. Recalls such as those involving the MSI CoreLiquid 240R and 360R from the consumer market demonstrate that built-in safety features—such as flow and temperature alarms—are by no means a luxury.
Price and Availability
The Alphacool ES Chiller 700 costs 749.99 euros plus shipping and is available for immediate order directly from the Alphacool online store.
Conclusion
With the ES Chiller 700, Alphacool introduces a compact compressor-based cooling solution that comes with everything needed for integration into an existing water-cooling loop: its own pump, expansion tank, precise temperature control, and the safety alarms essential for server operation. For admins and system builders looking for 700 watts of cooling capacity—just below that of the larger ES Chiller 1000—this is an interesting new option from Braunschweig.
