Details
This GPU water block fits two Nvidia cards, the RTX PRO 6000 Blackwell Workstation-Edition and the GeForce RTX 5090 Founders Edition. It is a compact 1.5-slot cooler for server and workstation builds, with both G1/4 ports on the rear terminal, and its active backplate is in the box and part of the loop.
Properties
- Fits
- RTX PRO 6000 Blackwell Workstation-Edition, GeForce RTX 5090 Founders Edition
- Cold plate
- Chrome-plated copper (Cu-HCP)
- Top
- Carbon
- Ports
- 2 x G1/4, on the rear
- Slots
- 1.5
- Backplate
- Active, chrome-plated copper and carbon (CFRP), included
Compatibility
Alphacool lists these cards for this block:
- Nvidia GeForce RTX 5090 Founders Edition, 32GB GDDR7, HDMI, 3x DP
- Nvidia RTX PRO 6000 Blackwell Workstation-Edition, 96 GB GDDR7
The cooler was designed for one specific PCB layout, and Alphacool's manual warns that design revisions may affect compatibility. Before ordering, compare your card with the pictures in Alphacool's GPU configurator, or look it up in its Compatibility List for Nvidia cards, and verify the PCB number if needed.
Made for servers and workstations
Alphacool designed this ES GPU water cooler specifically for professional use in performance-optimized server and workstation environments. Thanks to its compact 1.5-slot design and intelligently placed fittings, Alphacool says it meets the highest demands for cooling performance, operational reliability and ease of installation. That holds especially in densely populated server systems with limited space. Alphacool therefore calls it the ideal solution for enterprise applications where maximum performance, high reliability and efficient space management are the focus.
Carbon top and chrome-plated copper
The cooler's top surface is carbon fiber, a lightweight yet extremely durable material, and Alphacool credits it with reducing the overall weight significantly compared to conventional solutions. The matte carbon finish further emphasizes what it describes as a high-quality, understated look, combining functionality with an elegant appearance. The actual heatsink is made entirely of chrome-plated copper.
Alphacool says chrome plating is significantly harder and more durable than traditional nickel plating and that it offers reliable protection against corrosion, scratches and mechanical stress. It calls that ideal for continuous 24/7 operation, and says the durable plating reliably prevents peeling or damage, even under high thermal loads.
Active backplate
An active backplate is used for additional cooling of the card. Like the main cooling block, this component consists of a chrome-plated copper base and a carbon backplate. The two are connected via an internal double-nipple system that Alphacool calls unique. As is typical for Alphacool ES GPU coolers, this design places the inlet and outlet terminals on the back of the cooler, saving space. Alphacool describes it as a well-thought-out connection architecture that facilitates integration into existing cooling loops and simplifies tubing routing, even in very compact server cases.
Coolant flow
An optimized internal cooling channel structure takes the heat from the GPU, the VRAM and the voltage regulators, and Alphacool says it ensures particularly efficient heat dissipation. In Alphacool's words, the targeted coolant flow guarantees a uniform distribution across all thermally relevant components. The solid copper base, combined with the active backplate, enables what it calls excellent heat absorption and conduction.
What the loop needs
The cooler has two G1/4 connections with brass threads on its rear terminal. Each takes one of the compression fittings for your tube size, which are not in the box. The backplate needs no fittings of its own: coolant reaches it through the internal double-nipple link. Alphacool's specifications give 1.00 Nm as the maximum torque for the G1/4 thread. Thermal pads, thermal grease, a putty tool, screws, washers, nuts and the PCIe bracket come with the cooler.
Technical data cooler
| Dimensions (L x W x H) (in mm) | 231.10 x 119.40 x 13.40 mm |
| Slot size | 1.5 |
| Material cooler | Chrome-plated copper (Cu-HCP) |
| Material cooler top | Carbon |
| Threads | 2 x G1/4 |
| Material Connection thread | Brass (CuZn39Pb3) |
| Maximum torque G1/4 thread (in Nm) | 1.00 |
| Maximum torque M2 thread (in Nm) | 0.13 |
| Maximum torque M4 thread (in Nm) | 1.12 |
| Maximum operating temperature (in °C) | 60 |
| Recommended working temperature (in °C) | 20 |
| Minimum operating temperature (in °C) | -20 |
| Maximum tested pressure (in bar) | 4.00 |
| Recommended working pressure (in bar) | 0.00 - 2.00 |
| Thickness of the cooling plate | 3.30 |
| Thickness of cooling fins (in mm) | 0.40 |
| Distance between cooling fins (in mm) | 0.40 |
| Cooling technology | Jet Engine |
Technical data active backplate
| Dimensions (L x W x H) (in mm) | 208.97 x 120.90 x 10.93 mm |
| Material cooler | Chrome-plated copper (Cu-HCP) |
| Material backplate top | Carbon (CFRP) |
| Maximum torque M2 thread (in Nm) | 0.13 |
| Maximum torque M4 thread (in Nm) | 1.12 |
| Maximum operating temperature (in °C) | 60 |
| Recommended working temperature (in °C) | 20 |
| Minimum operating temperature (in °C) | -20 |
| Maximum tested pressure (in bar) | 4.00 |
| Recommended working pressure (in bar) | 0.00 - 2.00 |
| Thickness of the cooling plate | 2.5 |
| Cooling technology | Flow-through cooler |
Technical data thermal pads
| Thermal conductivity of thermal pads (in W/mK) | 7 |
| Thermal pads Hardness ASTM 2240 | 35 Shore 00 |
Technical data thermal paste
| Evaporation rate (volatility, 24@200 °C, in %) | Less than 0.5 |
| Density (g/cm3) | 3.2 (Test method ASTM D2196) |
| Viscosity (mPa·s) | 150~200*10³ (Test method ASTM D2196) |
| Operating temperature (°C) | -40 °C to 120 °C |
| Breakdown voltage (V/mil) | 250 (Test method ASTM D149) |
| Thermal impedance (°C in 2/W) | 0.1 +/- 0.01 (Test method ASTM D5470) |
| Maximum operating pressure (psi) | 40 |
| Quantity (in grams) | 1 |
| Color | Gray |
Notes
- Use only clear, transparent water cooling fluids. Alphacool warns that the particles and additives in pastel liquids can clog and permanently damage radiators, pumps, coolers and hoses, which can void the manufacturer's warranty.
- Take the original cooler off on an antistatic surface, unscrewing it from the back and disconnecting any fan or lighting cables, and work slowly if thermal adhesive is used. Clean the GPU, memory and contact areas of paste and pad residue, for example with isopropyl alcohol.
- Remove the plastic transport spacers before fitting the thermal pads, and make sure all components have sufficient clearance during installation.
- On the backplate, install the PCIe PCB first, then the I/O bracket and the I/O PCB. Align the backplate with the cooler and connect the I/O cable before fastening it with the screws.
In the box
- 1x ES RTX 6000 Pro Workstation/RTX 5090 Founders Edition Cooler
- 1x Active Backplate
- 2x 54x15x1mm Pad
- 4x 67.5x15x1mm Pad
- 4x 12x15x1mm Pad
- 5x 12x8x1mm Pad
- 1x 61.5x8x1mm Pad
- 1x 45x8x1mm Pad
- 9x 8x8x1mm Pad
- 5x 8x8x3mm Pad
- 1x Thermal Grease
- 1x Putty tool
- 6x M2x18mm Screw
- 6x M2x4mm Screw
- 2x Washer
- 2x M4 Nut
- 1x PCIe Bracket
Alphacool's manual and data sheet are both PDFs.
