PCI Express Network Card Thermal Management via Staggered Processors
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Solution Overview
Problem
Optical fiber network cards with limited heat dissipation mechanisms are prone to overheating due to increased heat generation from higher bandwidth and integrated circuits, restricting the number of ports and risking malfunction or damage.
Innovation Solution
A PCI Express network card design featuring a circuit board with five ports, two staggered high-power processors, and large heat sinks that provide effective heat dissipation by directing airflow and shading components without physical contact, allowing for efficient power sharing and heat management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of ports and integrated circuits on the network card is increased to meet higher bandwidth demands, then data transmission capability is improved, but heat generation increases causing overheating and potential malfunction
Solution Approach 1:
The network card is divided into multiple functional modules including five independent ports, two separate processors (first and second), and individual heat sinks for each processor. This segmentation allows heat to be dissipated from multiple localized sources rather than accumulating in a single area, enabling higher bandwidth operation without overheating
Solution Approach 2:
Heat sinks are introduced as intermediary components between the processors and the surrounding environment. These heat sinks act as thermal mediators that absorb heat from the processors and dissipate it through their larger surface area, preventing direct heat transfer to other components and maintaining operational temperatures
2Productivity
If more integrated circuits are added to increase processing power, then data processing capability is improved, but the device complexity and space requirements increase
Solution Approach 1:
The processing function is segmented into two separate processors rather than using a single complex processor. Each processor handles specific data streams independently, which simplifies the design of each individual processor while achieving higher overall processing capability through parallel operation
Solution Approach 2:
Each processor is designed to handle multiple port connections (first processor connects to first and second ports, second processor connects to third and fourth ports). This multi-functionality allows the system to achieve high processing capability with fewer, more versatile components rather than requiring dedicated processors for each port
3Area of stationary object
If processors are placed closer together to save space, then device compactness is improved, but heat from one processor interferes with the other causing performance degradation
Solution Approach 1:
Heat sinks are positioned between the first and second processors, acting as thermal barriers that prevent heat from one processor from directly affecting the other. Despite the compact arrangement where processors are adjacent on the circuit board, the heat sinks serve as intermediary thermal management components that isolate each processor's heat zone
Solution Approach 2:
The heat dissipation problem is solved by transitioning from a two-dimensional layout consideration to a three-dimensional thermal management approach. Heat sinks extend vertically from the circuit board surface, creating vertical thermal pathways that dissipate heat away from other components without requiring increased horizontal spacing between processors
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enables the network card to operate normally at high temperatures, ensuring reliable performance even at 50 degrees Celsius by effectively dissipating heat and preventing processor interference.
Implementation Method 1
The heat sinks abut against the first processor and the second processor, respectively
Implementation Method 2
effective heat dissipation could be achieved. Whereby, the heat generated by the first processor would not affect the performance of the second processor
Data Source
AI summary
A PCI Express network card is disclosed, including a circuit board, a plate, a plurality of integrated circuits, and two heat sinks. The circuit board has five ports. The plate is provided on the circuit board and near a front edge of the circuit board, wherein the plate has a plurality of openings. The integrated circuits are provided on the circuit board, including a first processor and a second processor, which consume the most power. The first processor and the second processor are arranged in a staggered way. Each of the heat sinks abuts against the first processor and the second processor, respectively. An area of each of the heat sinks is greater than an area of each one of the first processor and the second processor. Whereby, effective heat dissipation could be achieved.