This Bykski SPD 4U Rackmount Server Liquid Cooling Unit (B-640TK100-SPD-X) is an 8-GPU optimized thermal solution engineered for high-density server deployments. The high-capacity reservoir/pump module delivers uniform cooling to multiple GPU blocks, ensuring consistent thermal performance across all cards (with manifold not included). By directly cooling each GPU’s core and associated components via dedicated blocks in your loop, you can achieve lower temperatures, improved stability under sustained workloads, and extended hardware lifespan.

A high-flow design supports multi-block series or parallel configurations, allowing you to tailor the loop for pressure balance and thermal efficiency in 4U rack environments. For multi-GPU setups, bridges or manifolds may be required depending on your chassis layout and block orientation.

Specifications

• Chassis Form Factor: 4U rackmount, server-grade
• Pump: High-flow D5-class pump (integrated)
• Reservoir: High-capacity, front-access for serviceability and monitoring
• Radiator: All-copper, 100mm thick radiator features high-temperature welding, five-layer water channel design
• Control/Monitoring: Fill/bleed ports and visual flow/level indication along with SPD LCD Unit

Parts Included

• SPD 4U Rackmount Liquid Cooling Unit (reservoir/manifold/pump/radiator fully assembled)
• Mounting hardware for 4U rack installation NOT INCLUDED
• Standard G1/4” port inlet/outlets

Warnings

This is a repair-or-replace item. Returns are not accepted on compatibility issues or if the unit has had water/fluid run through it.

The product does NOT include printed instructions. Please check the product gallery images for the installation illustration. The manufacturer reserves the right to alter the design to expand compatibility. The delivered item may not 100% match the pictured item.

This product is designed for self-installation. The manufacturer is not liable for any damages resulting from misuse, including, but not limited to, improper installation or the use of incompatible hardware or fluids. By using this product, you accept all related risks.

To view our comprehensive and detailed return policy, please kindly use the link provided below. This link will direct you to all the necessary information regarding our procedures, guidelines, and requirements for returns. You will find everything you need to know about the return process, including eligibility criteria, timelines, and any specific conditions that may apply. Thank you for your understanding and cooperation in this matter. We appreciate your attention to this important information.

Return/Refunds and Restock Fees

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Shipping and Delivery Policies