Single-Phase Immersion Cooling with Submer

GIGABYTE has joined forces with Submer to offer a Single-Phase Immersion Cooling solution, allowing customers to drastically reduce their data center energy consumption and improve PUE, radically reducing operating costs and environmental impact.
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Immersion cooling is a well proven technology in many industries today, especially in high-power transformers and EV battery packs. It is the most effective method for heat dissipation and electrical protection of thermally dense components. Computer hardware has been immersion cooled since the 1960's with some supercomputers that have been completely submerged in a dielectric fluid to dissipate heat. The main reason why this method has not become mainstream may be that we did not need to do it at the time.

Low-density IC dies can be cooled by air, but each new generation of chips on the market gradually meets Moore's Law. We are in a very different situation now due to some major trends that are aligning. The result of these trends poses a unique challenge for the data center industry and our connected world. Therefore, GIGABYTE and Submer teams intend to meet the challenge together.

Learn More:
Implement Immersion Cooling in Your IT Deployment Strategy
Helping Companies Deploy Digitalization and Achieve Net-Zero Goals
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Usage Scenarios
5G, Edge Computing
The era of 5G will require telcos to invest more in edge computing to reduce data transfer latency. Edge data centers are often located in urban areas and have a restricted amount of space. Single-phase immersion cooling allows for a much greater density of processing capabilities in a restricted space, making it ideal for an edge computing deployment.
AI, Machine Learning
Training algorithms for AI applications requires a large amount of parallel processing power, delivered by dense GPU deployments. A large number of high powered GPUs produce a lot of heat, requiring high electricity bills for air cooling and air conditioning. Single-phase immersion cooling is a much more cost efficient and environmentally friendly solution.
Blockchain, Crypto
Blockchain and crypto rely on the verification of each endpoint in a peer-to-peer network to protect information. As more and more machines are connected to the network, authentication becomes frequent and mathematical calculations getting difficult, causing the computer to generate higher heat. Single-phase immersion cooling is a cost effective and environmentally friendly solution.
High Frequency Trading
High-frequency trading requires high-performance computing systems that can provide ultra-low latency to strive for timeliness. The transaction time difference of milliseconds may be profits or losses of millions of dollars. Single-phase immersion cooling can achieve higher overclocking possibilities for these extreme applications.
Advantages of Single-Phase Immersion Cooling
Higher Efficiency and Energy Savings
up to 95% reduction in cooling OPEX in the data centers compares to air cooling - including server power consumption and air conditioning costs.
Higher Computing Density
No need for heat sinks and cooling fans means computing parts can be placed closer, which can increase computing power by 10 times in the same space.
Improved Reliability
Components are not subject to temperature variations, reducing failure potential & no cooling fans required, eliminating degradation from vibration.
Lower Maintenance Requirement
Passive cooling system means no unnecessary parts to build or service, useful especially for remote locations such as edge computing stations.
Deployment Flexibility
Can be deployed without air conditioning and low maintenance requirements. Can be expanded or contracted in limited space through small tank design.
How Does Single-Phase Immersion Cooling Work?
Server or IT component is immersed in a thermally conductive dielectric coolant. The coolant will not change its state either boil or freeze, and always remain liquid. The coolant in the tank is pumped by cooling distribution unit (CDU) to the heat exchanger outside the tank, where the heat is transferred to secondary cooling circuit mostly the building cold water.
This combination with Submer's proprietary SmartCoolant coolant is sustainable, environmentally friendly and cost-effective, making GIGABYTE and Submer's solution the best when customers decide to use their equipment for immersion cooling.

Physical & Chemical Properties SmartCoolant
Fluid Type Synthetic
Fire Point 233°C
Pour point -50°C
Kinematic Viscosity at 40°C 5.1mm²/s (cSt)
Acidity ≦0.01mg KOH/g
Corrosive Sulphur Non-corrosive
Thermal Conductivity at 40°C 0.14W/m.K
Specific Heat at 40°C 2.26kJ/Kg.K
Dielectric Dissipation Factor at 90°C ≦0.005
Volume Resistivity 10 GΩm
Biodegradability (28 days) Readily Biodegradable
NSF food-grade Certification HT1
Global Warming Potential None

Immersion Cooling Infrastructure – Submer
Submer began in 2015, with the idea of challenging what it means to be a traditional data center. Today, Submer’s state-of-the-art solutions designed for data centers, cloud and edge computing are purpose built to future-proof their infrastructure, addressing challenges of heat-reuse, net-zero water and site selection.
Submer understands that it can be difficult to decide what solution can work best for customers as there are many elements that need to be considered: computing power, electricity, and capacity. So, Submer has done the hard work for customers with GIGABYTE’s assistance, and have created what we believe is the ultimate solution for the Edge, AI and HPC industry.

With multiple options available per industry, customers can choose a complete purpose-built solution to meet their challenges.
SmartPod: Immersion Cooling Made Practical
SmartPod is a commercial immersion cooling system designed based on OCP specifications, which can support 19” EIA standard servers and OCP computing nodes.

SmartPod installs servers differently than traditional cabinets with vertical installation, instead arranges servers in horizontally in a tank equipped with SmartCoolant. Due to its characteristics, SmartCoolant can quickly and effectively remove heat from hot spots. Since an immersion cooling server does not require cooling fans, it has direct advantages in computing density and power consumption.

Model SmartPodX SmartPodXL SmartPodXL+
Heat Dissipation Capacity 50kW 50kW (1 CDU) 100kW (2 CDUs)
IT Hardware Capacity 21U / 19OU 44U / 42OU 41U / 39OU
Dimensions 120 (L) x 90 (W) x 119 (H) cm 231 (L) x 93 (W) x 121 (H) cm 231 (L) x 93 (W) x 121 (H) cm
Weight Empty: 411kg
Full of SmartCoolant: 872kg
Empty: 671kg
Full of SmartCoolant: 1620.5kg
Empty: 767kg
Full of SmartCoolant: 1716.5kg
SmartCoolant Capacity 576L 1187L 1187L
Ambient Temperature -20°C~40°C -20°C~40°C -20°C~40°C

MicroPod: The Smartest Solution for Edge & Cloud Computing
MicroPod is an edge-ready, plug-and-play all-in-one data center solution that provides unprecedented high-density and efficient infrastructure anywhere. It merges primary and secondary cooling units together without the need for additional water distribution systems, such as facility water systems. Whether it is warehouses, office buildings, urban centers, or remote areas with harsh weather conditions and far from the grid, MicroPod will be suitable for the task.

Heat Dissipation Capacity Outdoor configuration: 5kW (in direct sunlight)
Indoor configuration: 6.7kW
IT Hardware Capacity 6U, 800mm max depth
Dimensions 150 (L) x 84 (W) x 122 (H) cm
Weight Empty: 290kg
Full of SmartCoolant: 433kg
SmartCoolant Capacity 180L
Ambient Temperature -5 °C - 40 °C

Immersion Cooling Servers with GIGABYTE
GIGABYTE is an industry leader in high-performance computing servers. Due to the high-power consumption and heat generated by high-performance processors or general-purpose computing accelerators, HPC servers and the derived applications are particularly suitable for immersion cooling.

By cooperating with Submer to provide standard products compatible with SmartPod, GIGABYTE's modular product design allows us to quickly respond to customer needs and modify other air-cooled servers to be fully compatible with submerged cooling systems or environments.
GIGABYTE Server & Submer Cooling Tank Compatibility
AI & HPC immersion cooling system
Compatible with SmartPod & MicroPod
Edge immersion cooling system
Compatible with SmartPod & MicroPod
Related Technologies
What is a data center? A data center is a facility that an organization uses for housing their IT equipment, including servers, storage, networking devices (such as switches, routers and firewalls), as well as the racks and cabling needed to organize and connect this equipment. This equipment also requires infrastructure to support it such as power distribution systems (including backup generators and uninterruptible power supplies) and ventilation and cooling systems (such as air conditioning systems or liquid cooling systems). A data center can range in size from a single room to a massive multi-warehouse complex. In 2005, the American National Standards Institute (ANSI) and the Telecommunications Industry Association (TIA) published standard ANSI/TIA-942, "Telecommunications Infrastructure Standard for Data Centers", which defines four tiers of data centers by various levels of reliability or resilience. For example, a Tier 1 data center is little more than a server room, while a Tier 4 data center offers redundant subsystems and high security.Learn more: 《How to Build Your Data Center with GIGABYTE? A Free Downloadable Tech Guide》
What is it? PUE (Power Usage Effectiveness) is the ratio of the total amount of power used by a data center compared to the power that's actually delivered to the computing equipment. An ideal PUE ratio would be 1.0: 100% of the power delivered to the data center is used for computing. However, data centers require cooling systems, lighting, and other equipment that will also consume some of this power. As such, the PUE for a conventional data center will always be greater than 1.0.
Immersion cooling is a type of liquid cooling method where the servers are directly immersed inside a bath of non-conductive, dielectric liquid. Heat given off by the servers' components is transferred to the surrounding liquid. Because of the temperature gradient in the liquid, the heated liquid that is less dense rises to the top. As this occurs, the liquid is removed from the top of the tank and replaced with cooler liquid from the bottom. This heat transfer process is called natural convection. Therefore, the immersion cooling system does not require additional active cooling components, such as fans, and so it can go a long way toward improving your data center's energy efficiency.There are two types of immersion cooling, which work in slightly different ways.●Single-Phase Immersion CoolingIn this process, the coolant will not change its state by evaporating, it always remains a liquid. The warm coolant in the tank is pumped out by the coolant distribution unit (CDU) and the heat is transferred to a heat exchanger, which is a secondary cooling circuit that transfers the heat to facility water or outside air. ●Two-Phase Immersion CoolingThe cooling method in two-phase is similar to single-phase in that the coolant absorbs the heat from the servers or IT components; however, in two-phase immersion cooling, the liquid changes state. As the coolant reaches its ultra-low boiling point, the vapor bubbles rise to the top and enter a gaseous state. After evaporating, the vapor comes in contact with a condenser that returns it back to its liquid state. The fluids flow back into the bath to renew the cycle.
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