Alphacool ES Geforce RTX 4090 Reference 1-slot design full-cover GPU-waterkoeler 13869

The Alphacool ES Geforce RTX 4090 Reference 1-Slot-Design is a full-cover GPU water block engineered for NVIDIA GeForce RTX 4090 reference design graphics cards. Its nickel-plated copper base delivers exceptional heat transfer directly from the GPU die, memory, and VRM, while the parallel flow design ensures low hydraulic restriction and efficient cooling across all critical components.

Advantages

This water block transforms a bulky 3-slot graphics card into a sleek 1-slot solution, freeing up valuable PCIe space for multi-GPU setups or compact builds. The acetal top provides durability and electrical isolation, while the stainless steel terminal with four G1/4" threads offers flexible tubing routing. Included thermal pads and paste guarantee proper contact for all components, and the block is pressure-tested to 0.8 bar for leak-free operation.

Suitable for

• NVIDIA GeForce RTX 4090 reference design graphics cards
• High-performance gaming and workstation PCs
• Custom liquid cooling loops with standard G1/4" fittings
• Compact builds requiring single-slot GPU clearance

Key specifications

• Compatible with RTX 4090 reference PCB
• 1-slot design for space-saving installation
• Nickel-plated copper base for optimal thermal conductivity
• Acetal top for durability and low weight
• Stainless steel terminal with 4x G1/4" threads
• Parallel flow for balanced cooling
• Thermal pads and paste included
• Pressure tested at 0.8 bar

Recommendations

For best results, pair this block with a high-quality D5 or DDC pump and a radiator of at least 360mm. Use clear or colored coolants that are compatible with nickel and acetal. Ensure proper mounting pressure and use the included screws for a secure fit. A backplate is not included; consider Alphacool's optional backplate for added rigidity and aesthetics.