Front I/O Expansion Module for Server Cooling
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Solution Overview
Problem
Existing servers in cloud service provider datacenters require effective cooling solutions for high-power smart network interface controllers (NICs), which are typically better supported when installed in the front of the server to take advantage of cooler ambient air.
Innovation Solution
A front I/O expansion module for computing devices that includes a substrate with expansion slots configured to be communicatively coupled to backplane slots, allowing for the installation of peripheral components like network cards and GPUs in a cooler environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If smart network interface controllers are installed in the back of the server, then the server structure is simple and rear access is sufficient, but the cooling effectiveness deteriorates due to pre-heated air from storage, CPUs, and memory
Solution Approach 1:
The patent introduces a front I/O expansion module that adds front accessibility to the server, effectively adding a new spatial dimension for I/O access. This allows network devices to be installed in the front where cooler ambient air is available, resolving the cooling issue without fundamentally redesigning the entire server architecture.
Solution Approach 2:
The front I/O expansion module acts as an intermediary between the backplane slots and the front I/O bays. It contains conversion modules that interface with backplane slots and provide I/O capabilities at the front of the server, enabling better cooling while maintaining compatibility with existing backplane architectures.
2Temperature
If smart network interface controllers are installed in the front of the server, then cooling effectiveness improves due to access to cooler ambient air, but physical access to the back of the server becomes necessary for some operations
Solution Approach 1:
The front I/O expansion module provides universal I/O capabilities at the front of the server, allowing network devices to be accessed and operated from the cold aisle. This multi-functional approach consolidates both installation and operational access at the front, eliminating the need for rear access while maintaining cooling effectiveness.
3Ease of operation
If front I/O capabilities are added to the server, then physical access from the cold aisle is maximized and cooling is improved, but the device complexity increases
Solution Approach 1:
The patent segments the I/O capabilities into a separate front I/O expansion module that can be independently managed. This module contains its own substrate, expansion slots, and conversion modules, allowing front I/O functionality to be added without complicating the core server architecture. The segmented design enables modular installation and maintenance.
Data Source
AI summary
An input/output (I/O) expansion module includes a first substrate, and an expansion slot disposed on the first substrate. The expansion slot is configured to be communicatively coupled to a backplane slot disposed on a backplane of a computing device. The computing device is external to the I/O expansion module.