EN
Green Nexcenter®
The Energy-Efficient Data Center for High-Density Servers
'Green Nexcenter®' is an ultra-energy-saving data center service suitable for the installation and cooling of high-density servers,
the use of which is expanding due to the increasingly high performance of CPUs and GPUs.
Challenges of server operation
when using generative AI/GPUs for business purposes
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Challenge Increased heat generation
High processing capacity dramatically increases the heat generation. Efficient operation is difficult with conventional air cooling methods.
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Challenge Soaring electricity prices
Electricity consumption increases sharply with processing capacity, resulting in higher electricity bills and CO₂ emissions.
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Challenge Flexibility of the installation environment
We want to start operating high-performance servers to meet our company's policies and needs, but we are unable to find a flexible installation environment.
Why Choose Green Nexcenter®
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First data center service in Japan*1 to be compatible
with direct liquid coolingSupports high-density servers for generative AI/GPUs. By using liquid, which has a higher thermal conductivity than air to cool the servers, efficient cooling is possible, creating an IT environment that can handle power consumption from 20kW to a maximum of 80kW per rack.
*1 In-house research based on interviews with domestic server equipment vendors as of October 2023
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Reduces power consumption by approximately 30%
(excellent power usage effectiveness of pPUE1.15*2)The direct liquid cooling, which uses liquid with high thermal conductivity to cool servers, reduces power consumption for cooling server equipment by approximately 30%*3 compared to conventional data centers. This results in a power usage effectiveness of pPUE 1.15 (target value) per room.
*2 Partial PUE (Power Usage Effectiveness). An index value indicating power usage effectiveness calculated by dividing the power consumption of the data center by the power consumption of IT equipment
*3 Compared to the actual measured pPUE of 1.35 for the air-cooling system provided by NTT Communications
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Available by rack
Like conventional air-cooling methods, our data center service can be provided on a rack-by-rack basis, allowing for flexible use according to the needs of your business, whether that be large-scale use, small-scale use, or as an add-on.
Examples of
Green Nexcenter®
Use
Using Green Nexcenter® in the Manufacturing Industry
- GPU servers that process a huge amount of data are being operated in laboratories and factories when using generative AI.
- Client company wants to switch to the latest, higher-performance GPU servers, but is unable to install and operate them at existing locations due to the excessive heat they generate.
- Latest high-performance GPU servers are operated within the ultra energy-saving data center service 'Green Nexcenter®'
- Operational workload is reduced by combining 'Green Nexcenter®' with NTT Communication's total solution that includes a network, cloud, and SI, etc.
We receive inquiries from customers in many different fields
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Manufacturing company (semiconductor manufacturer)
Using high-performance EDA with built-in generative AI
Automatically designs circuits by simply entering a few parameters at the theoretical design stage, etc.
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Pharmaceutical company
Utilizing AI to analyze genetic information and causes of diseases
Analyzing target searches and inferred molecular arrangement of compounds
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Financial company
Utilizing AI and supercomputers to improve computation speed
Calculating high computational cost items such as interest rates, credit assessments, and derivative pricing
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Game developer
Supporting development processes such as motion learning, Bug detection and correction
Image resolution conversion through the use of generative AI
Customers considering the use of high-density for AI
GPUs, etc. have consulted with us about [lack of space for installation], [lack of cooling capabilities],
and [the difficulties they face in in creating an efficient environment].
About
Direct
Liquid Cooling
What is Direct Liquid Cooling?
Direct liquid cooling is a method of cooling that directly supplies liquid to heat sinks (components installed to dissipate heat from parts) in order to address the high heat generated from chips embedded in server equipment.
Why "Direct Liquid Cooling"?
GPU servers and HPC (High Performance Computing) equipped with high-spec GPUs are expected to become more widespread in the future as tools for generative AI. These systems offer a significant increase in the maximum power consumption and heat generation per unit.
Meaning we are now reaching a point where existing cooling methods can no longer manage the heat load effectively.
The direct liquid cooling server equipment works by circulating a coolant liquid through a cold plate (metal plate) placed on the CPU/GPU chip (heating element) to remove heat and cool the system.
By using a liquid with a higher thermal conductivity than air to cool the server, more efficient cooling is possible compared to conventional air cooling,enabling IT environments that can handle power consumption from 20kW to a maximum of 80kW per rack, which was previously difficult to achieve.
Environmental Considerations
Advancing Towards Carbon Neutrality
The NTT DOCOMO Group aims to achieve carbon neutrality for its data centers and mobile operations by fiscal 2030, and for its supply chain by fiscal 2040.
NTT Communications is proactively introducing highly efficient, energy-saving equipment and expanding its adoption of renewable energy to reach this goal.
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Energy-saving
Green Nexcenter® reduces power consumption by implementing energy-saving measures that utilize the latest technologies.
- By adopting wall-mounted air conditioning with aisle containment, the air conditioning unit's airflow power is reduced compared to standard floor-mounted systems. This improves air conditioning efficiency by stabilizing the supply of cool air through air intake rectification.
- Air conditioning control is optimized through the automatic measurement of temperature conditions and the use of machine learning (AI).
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Renewable energy
Green Nexcenter® is expanding its use of renewable energy to achieve carbon neutrality by 2030. In addition to providing a variety of renewable energy sources that customers can select based on their specific needs We provide "environmental value" that demonstrates virtually zero CO₂ emissions to support ESG management toward achieving carbon neutrality for our customers.
Visit us
Lab Environment Tours
We offer tours of our data center and laboratory environment to our customers. During the tour. Customers can see our automated operation robots and equipment related to our 'direct liquid cooling', as well as other cooling methods such as the 'rear door method', which circulates cooling liquid through rack doors, and the 'liquid immersion method', in which servers are immersed in cooling liquid.
The facility offersa proof-of-concept (PoC) environment that can support high density, allowing for verification and demonstration of new product development aimed at commercialization and service implementation.
Please feel free to contact us.
