The Alphacool ES 2U Reservoir is a versatile reservoir optimized for use in 2U server cases. The quick-release fasteners on the front ensure quick and easy maintenance. The cooling system can be continuously monitored using the integrated flow and temperature sensors. The illuminated window makes the fill level easy to read at any time.
Optimized for servers
The Alphacool All-in-One reservoir has been specially developed for 2U server cases. The device has a compact design to take up as little space as possible in the server case. Due to the quick-release fasteners on the front, the cooling system can be filled and vented quickly and easily. The illuminated window makes it possible to check the fill level in the system at any time. The Alphacool ES 2U reservoir is compatible with pumps using D5 format such as the Alphacool VPP Apex.
Integrated sensors
The reservoir has a temperature sensor that covers a measuring range of -40 to 125°C and is connected to the mainboard via a 2-pin connector. In addition, a flow sensor, which is connected via a 3-pin connector, enables continuous monitoring of the water flow in the cooling system.
| Technical data | |
| Dimensions (L x W x H) (without pump) | 99.66 x 146.00 x 83.90mm |
| Material | Metal, acetal |
| Weight | 1500g |
| Threads (front side) | 2x quick-release fastener G1/4” |
| Threads (rear side) | 1x G1/4" In | 1x G1/4" Out |
| Connection flow sensor | 3Pin |
| Connection temperature sensor | 2Pin |
| Connection aRGB | 3-Pin 5V |
| Pump compatibility | D5/VPP |
| Max working temperature | 60 °C |
| Pressure tested | 0.8 bar |
| Color | black |
The EK-Pro CPU WB 4677 Rack Ni + Acetal is a dedicated enterprise-grade water block with 1U chassis compatibility specifically developed for LGA 4677 Intel® Xeon processors. The core of the new CPU water block was refined to manage the growing heat dissipation of new processors and to upgrade connectivity options for server rack requirements. The new server/workstation-grade CPU water block is compatible with 1U chassis type and suitable for use in server racks.

The EK-Pro CPU WB 4677 Rack Ni + Acetal water block features a total of 4 G1/8" threaded side ports for low-profile usage.
This enterprise cooling solution is built with performance, reliability, serviceability, and no compromises in mind. This water block meets these demands with top thermal performance and unparalleled connectivity, making it the perfect choice for liquid cooling high-density computing systems.
The EK-Pro CPU WB 4677 Rack Ni + Acetal water block features a precisely machined copper base (coldplate) made from the purest copper available on the market and is treated with nickel electroplating. The top is CNC machined from durable black POM Acetal, and the hold-down bracket is made of laser-cut stainless steel.
Intel® CPU socket compatibility:
- LGA 4677

Enclosed:
- EK-Pro CPU WB 4677 Rack Ni + Acetal Water Block
- 2x EK plug G 1/8”
- EK-Loop Multi Allen Key (6mm, 8mm, 9mm)
- 1x Torx T30 Key - 1x 5mm Allen Key
- Thermal grease (1g)


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