Liquid cold plate is a critical component in modern thermal management systems. ToneCooling specializes in custom liquid cold plate solutions for OEM and industrial applications. This article covers key aspects of liquid cold plate technology, design considerations, and manufacturing processes.
Liquid cold plate Overview
As a leading manufacturer of liquid cold plate products, ToneCooling offers comprehensive engineering support for liquid cold plate projects. Our liquid cold plate solutions are designed for maximum thermal performance, reliability, and cost-effectiveness in demanding applications.
The AMD SP5 liquid cooling kit delivers 1,100 W thermal dissipation with an ultra-low pressure drop of less than 3 kPa at 1.0 LPM — the lowest hydraulic impedance cold plate in ToneCooling’s AI server portfolio. Designed for AMD EPYC 9004/9005-series processors on the SP5 socket, this compact 118 × 92.4 × 25 mm Purple Copper T2 cold plate provides maximum thermal performance with minimal pump overhead for large-scale CPU deployments.
“AMD EPYC SP5 processors power the majority of cloud AI inference workloads, and these deployments scale to thousands of sockets per cluster,” says Dr. Kelvin Chen, Chief Thermal Engineer at ToneCooling. “At less than 3 kPa per node, our SP5 cold plate allows CDU systems to serve the largest clusters without oversized pump infrastructure — reducing both capital cost and cooling energy consumption.”
AMD SP5 Liquid Cooling Kit — Complete Specifications
| Parameter | Specification |
| Cooling Capacity | 1,100 W |
| Cold Plate Material | Purple Copper T2 (C1100, 391 W/m·K) |
| Cold Plate Dimensions | 118 × 92.4 × 25 mm |
| Internal Geometry | CNC micro-channel, optimized for low ΔP |
| Pressure Drop | <3 kPa @ 1.0 LPM |
| Nominal Flow Rate | 1.0 LPM |
| Coolant | 25% Ethylene Glycol-Water (EGW) |
| Maximum Operating Pressure | 0.6 MPa |
| Leak Testing | 100% helium leak test at 0.6 MPa |
| Socket Compatibility | AMD SP5 (EPYC 9004/9005 series) |
| Mounting | SP5 socket-matched bracket with spring-loaded fasteners |
AMD EPYC SP5 Platform — Thermal Requirements — Amd sp5 liquid cooling kit
AMD EPYC 9004-series (Genoa) and 9005-series (Turin) processors on the SP5 socket deliver up to 128 cores with TDP ratings reaching 1,100 W in high-performance configurations. These processors power a growing share of AI inference servers, cloud compute nodes, and HPC clusters where per-socket thermal management directly affects compute density and energy efficiency.
The SP5 socket’s IHS (integrated heat spreader) geometry of approximately 118 × 92 mm defines the cold plate contact area and mounting constraints. ToneCooling’s cold plate is precision-machined to maximize thermal interface coverage across the full IHS surface, ensuring uniform heat extraction from all chiplet positions on the multi-die EPYC package.
Ultra-Low Pressure Drop Design — Amd sp5 liquid cooling kit
The defining feature of ToneCooling’s SP5 cold plate is its sub-3 kPa pressure drop at 1.0 LPM flow rate. This ultra-low hydraulic impedance is achieved through:
- Wider channel geometry — Micro-channel widths optimized for the SP5’s moderate heat flux density (compared to GPU platforms), allowing wider channels that reduce flow resistance while maintaining adequate convective heat transfer.
- Short flow path length — The compact 118 mm cold plate dimension keeps the coolant path short, minimizing frictional pressure losses.
- Single-pass flow architecture — Coolant flows through the cold plate in a single pass from inlet to outlet, eliminating the U-turn losses present in multi-pass designs.
- Optimized header geometry — Inlet and outlet headers distribute flow uniformly across all micro-channels without creating localized high-velocity zones that increase pressure drop.
At scale, the pressure-drop advantage compounds: a 1,000-node cluster using ToneCooling SP5 cold plates at <3 kPa per node requires significantly smaller CDU pumps than competing solutions at 8–15 kPa, reducing cooling infrastructure CAPEX by 15–25%.
25% EGW Coolant — Freeze Protection for Versatile Deployment — Amd sp5 liquid cooling kit
Unlike GPU platforms that use pure water for maximum thermal performance, the SP5 kit uses 25% ethylene glycol-water (EGW) coolant. This choice reflects the deployment reality for CPU-heavy clusters:
Outdoor CDU compatibility: Many data center facilities use outdoor coolant distribution units where ambient temperatures can drop below freezing. The 25% EGW mixture provides freeze protection to approximately -12 °C, ensuring year-round operation without dedicated glycol injection systems.
Mixed-platform facilities: CPU-only zones within a data center often share CDU infrastructure with areas that require glycol protection. Using EGW throughout the CPU cooling loop simplifies facility coolant management.
Adequate thermal performance: At 1,100 W TDP, the thermal penalty of EGW versus pure water (approximately 15% lower thermal conductivity) is well within the cold plate’s design margin. The sub-3 kPa pressure drop confirms that the cold plate is not thermally constrained even with glycol-based coolant.
SP5 Socket Mounting System
The mounting system is designed for the SP5 socket’s specific bolt pattern and contact pressure requirements:
- Spring-loaded fasteners — Calibrated springs maintain consistent contact pressure across the IHS surface, compensating for manufacturing tolerances and thermal expansion during operation.
- Anti-rotation features — Mounting brackets include anti-rotation pins that prevent cold plate movement during server shipping and rack installation.
- Tool-free installation option — Captive thumb-screw variants available for applications requiring frequent CPU access without tools.
- Dual-socket compatibility — Hose routing optimized for dual-socket SP5 motherboard layouts, with flexible hose lengths that accommodate both CPU positions without kinking or excessive slack.
Quality Validation
- Helium leak testing — 100% production units at 0.6 MPa
- Thermal resistance verification — Validated at 1,100 W using calibrated heater test vehicle matching SP5 IHS geometry
- Pressure-drop confirmation — Flow-bench testing at 0.5, 1.0, and 1.5 LPM confirms <3 kPa at nominal flow
- Contact pressure mapping — Pressure-sensitive film verification ensures uniform TIM compression across full IHS area
- Thermal cycling endurance — 200+ hours, 25 °C to 80 °C, validating long-term reliability
Ordering and OEM Support
- Engineering samples: Available within 10 business days — the shortest lead time in our AI server portfolio
- Volume production: Monthly capacity supporting 10,000+ SP5 cold plate assemblies
- Custom variants: Modified hose lengths, alternative fitting types, and custom TIM options for OEM-specific requirements
Contact ToneCooling at tonecooling.com/contact to request SP5 cold plate samples or discuss volume pricing for your AMD EPYC deployment.
Frequently Asked Questions
What AMD processors does the SP5 liquid cooling kit support?
The kit supports all AMD EPYC processors on the SP5 socket, including 9004-series (Genoa), 9005-series (Turin), and future SP5-compatible SKUs up to 1,100 W TDP.
Why is the pressure drop so low compared to GPU cold plates?
The SP5 cold plate operates at 1.0 LPM (versus 2.5–8.0 LPM for GPU platforms) and has a shorter flow path due to its compact 118 mm dimension. The micro-channel geometry is specifically optimized for low hydraulic impedance at this moderate flow rate, achieving <3 kPa — enabling CDUs to serve very large CPU clusters without oversized pumps.
Can the SP5 kit be used in dual-socket server configurations?
Yes. The kit includes flexible hose lengths optimized for dual-socket SP5 motherboard layouts. Both CPU positions receive balanced coolant flow through the rack-level manifold system.
Why does the SP5 kit use glycol coolant instead of pure water?
CPU deployments frequently use outdoor CDU systems where freeze protection is necessary. The 25% EGW mixture provides protection to approximately -12 °C while delivering adequate thermal performance for the SP5’s 1,100 W TDP.
What is the lead time for volume orders?
Engineering samples ship within 10 business days. Volume production capacity supports 10,000+ assemblies per month with full lot traceability and quality documentation.
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This guide on Amd sp5 liquid cooling kit provides key insights for engineers and procurement teams. For industry standards and best practices, refer to ASHRAE thermal guidelines.
Why Choose ToneCooling for Liquid cold plate
ToneCooling provides professional liquid cold plate solutions with custom designs, fast prototyping, and competitive OEM pricing. Our liquid cold plate products serve data center, EV, industrial, and semiconductor applications worldwide.
Contact ToneCooling for custom liquid cold plate solutions. Visit tonecooling.com or email info@tonecooling.com. US: +1 (832) 720-7542. Response within 24 business hours.
Industry References & Standards
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Last Updated: 2026-04-08
