Details
A full-cover water block for the ASUS TUF Gaming GeForce RTX 5090 and its OC Edition. The Watercool HEATKILLER V ULTRA for RTX 5090 ASUS TUF ACRYL Ni aRGB pairs a nickel-plated electrolytic copper base (100 x 0.15 mm fins) with an acrylic cover and natural anodized aluminum trim. The aRGB lighting comes pre-assembled. It cools the GPU, the memory and the voltage converter, and the backplate is in the box.
Properties
- Cards
- ASUS TUF Gaming GeForce RTX 5090 and OC Edition
- Base
- Nickel-plated electrolytic copper, 100 x 0.15 mm fins
- Cover
- PLEXIGLAS GS with natural anodized aluminum
- Ports
- 6x G1/4 (DIN ISO 228-1)
- Lighting
- aRGB board, plug-in
- Size
- 259.5 x 130 x 27.5 mm with backplate
Made for one card
According to Watercool, the new HEATKILLER V graphics card coolers for the ASUS RTX 5090 TUF graphics cards represent a consistent further development of its already successful RTX 4090 coolers, optimized for maximum performance. The entire unit was designed specifically around the ASUS RTX 5090 TUF board to achieve maximum performance. These are the key features of the HK V ULTRA series:
- Modular ULTRA-Performance base plate with 100 x 0.15 mm fins
- Dual layer inflow as well as a symmetrical cooling design
- Design-integrated connection threads in a connection module that is screwed to the copper base plate
- A screwless front thanks to a magnetic holding system
- An aRGB board with an improved connector system
Modular ultra-performance base plate
Watercool says its current Ultra-Performance base plate, with 100 fins of 0.15 mm, sets the standard for water-cooled graphics card coolers. In its words, the plate is currently considered the benchmark in the water cooling field. The ULTRA version has a larger cooling surface than the PRO version, ensuring better temperatures.
All gaps to heat-sensitive components have been minimized, giving optimal heat dissipation from thermally sensitive areas such as the RAM and the voltage converter. Precisely fitting spacers ensure perfect stability and an optimal force distribution between the cooler, the graphics card and the backplate.
Dual layer inflow and symmetrical cooling design
Both are found in the current version of the HEATKILLER V GPU cooler. The increased inflow is particularly important for the ultra-performance base plate. Dividing the water into two levels gives a better flow through the cooler. The symmetrical flow paths, which were implemented through extensive flow simulations, optimize the flow and thus the overall performance of the block.
Screwless front, easy maintenance
A newly developed magnetic mounting system enables a screwless front design. It also gives quick access for maintenance or for the installation of an aRGB board.
High-performance thermal pads for GDDR7 RAM
Watercool's development department invested a lot of time in finding the ideal thermal pads for graphics card memory. Watercool says the pad it found lowers the temperatures around the memory compared to the very good standard pads.
Design-integrated side connection module
For optimal flow and compact dimensions the connection module is part of the design, and it is screwed to the cooler's copper base plate for increased stability. Together with the screwless cover and the included backplate, the cooler appears to be a single unit. Watercool shaped the cooler so that the electronic components of the circuit board are not visible.
Backplate and aRGB in the package
Watercool has completely redesigned the cooler's mounting system. Unlike previous versions, the entire cooling unit now screws to the backplate. That not only simplifies installation but also distributes the contact forces optimally, further increasing cooling performance. In addition to its impressive appearance, the design also achieves better temperatures.
The aRGB board now features a modular design with a compact plug-in system, and implementing it as a printed circuit board ensures greater durability. Thanks to the high compatibility of Watercool's LEDs, the Heatkiller V cooler can be integrated into any lighting concept. The plug-in system also allows the cooler to be used easily without lighting.
Optional accessories
A connection module with side connection threads is also available: the HEATKILLER V Sideport Terminal for ASUS RTX 5090 TUF is a connection terminal with side inputs/outputs. Each port in use takes one G1/4 fitting; see our fittings.
Made in Germany
Production is carried out with the utmost care on Watercool's state-of-the-art CNC machinery in Waren an der Müritz. Many steps are performed by hand, and each product is finished according to the four-eyes principle: Made in Germany, as you would expect.
Compatibility
Watercool lists two boards for this block. With the Pro-Performance base plate instead, the same card takes the HEATKILLER V PRO in nickel.
- ASUS TUF Gaming GeForce RTX 5090
- ASUS TUF Gaming GeForce RTX 5090 OC Edition
Technical specifications
| Base plate material | Electrolytic copper, nickel-plated |
| Cover material | PLEXIGLAS® GS |
| Cover material | Aluminum, natural anodized |
| Connection terminal material | Acetal |
| Dimensions (LxWxH) | 259.5 x 130 (incl. terminal) x 27.5 mm (incl. backplate) |
| Dimensions with optional connection module | 249.5 x 130 (incl. terminal) x 27.5 mm (incl. backplate) |
| Connection | 6x G1/4 inch (DIN ISO 228-1) |
| Pressure | Approved up to 1 bar |
Notes
- Take off the pre-mounted backplate first; its red plastic washers are only transport protection and must be removed.
- Watercool recommends demineralized or deionized (distilled) water with a suitable corrosion inhibitor as coolant.
- Removing the original air cooler may affect or void the graphics card warranty.
In the box
- 1 x HEATKILLER® V ULTRA aRGB
- 1 x HEATKILLER® V ULTRA backplate
- 1 x mounting material
Watercool's assembly instructions show the thermal pad placement, the mounting steps, the aRGB module and the optional sideport terminal.






